The detonation can be carried out in an atmosphere of gaseous nitrogen, gas products of a detonation, in a vacuum, inert gases and air. 263, pages 931-934) indicated that the reaction between calcium high purity obtained by bibliomania, and dry nitrogen begins at 200°but the increase of mass remains small up to about 500°C. the calcium Nitride may also be contaminated mixed nitride of Ca2ZnN2that can be obtained at a temperature of about 650°With the reaction of Ca3N2c with zinc in the presence of nitrogen. Wiki User Answered . Additive at size of particles lesser than 300 mcm in the amount of 0.9-1.0% of mass of mixture may be introduced into first mixture. Furnace 4 may contain a device for supplying a regulated pressure to the molten alloy. Thus, the three-way valve 27 respectively connected to the second and third tanks 19 and 25 group is a rotary second and third pipes 28 and 29. Other articles where Calcium nitride is discussed: nitride: Preparation of nitrides: …here for the synthesis of calcium nitride, Ca3N2. EFFECT: reduced power consumption and improved performance characteristics of cubic boron nitride. SUBSTANCE: invention can be used in the manufacturing of a cutting tool and composites for space and aviation technology. In particular, ferrosilicium with 50-95% Si is ground to particle size not greater than 0.1 mm and then mixed with silicon nitride and/or with ammonium chloride, and/or group II metal fluoride, and/or partial ferrosilicium combustion product containing 50-90% silicon nitride, 30-50% iron silicides, 4-16% iron, and up to 5% silicon. EFFECT: increase in the output of the target product. Ca also helps crops minimize disease and environmental stresses such as heat and soil salts, while all ammonium-based nitrogen fertilizers create sites of acidity, which increase the risk of soil-borne disease infections such as fusarium. 1. EFFECT: enhanced efficiency; possibility of producing flaw-free material possessing high strength. Part of the nitride powder of calcium obtained in the reactor, may in fact be captured zinc, condensed on the walls. 8. in length. They therefore decomposed by electrolysis to produce calcium on the cathode and nitrogen or oxygen at the anode. Convert grams Calcium Nitride to moles or moles Calcium Nitride to grams. The method of synthesis according to claim 7, characterized in that the calcium nitride, obtained during the reaction is collected in a collector device, located at the bottom of the reactor. Using YaraLiva calcium nitrate fertilisers results in higher yields . Calcium Ammonium Nitrate (CAN) is not fully soluble and only suitable for top dressing. The method of synthesis according to claim 1, characterized in that the zinc-calcium alloy is sprayed into the upper part of the reactor in the form of droplets and the height of the reactor is adapted to the kinetics of the reaction, so that a significant fraction of the calcium contained in the droplets, NITRILES drop the last. The total ensemble is kept for 4 min, cooled, and kept for 1 min at pressure 45-47 kbar, after which pressure is lowered to atmospheric value, synthesis product is withdrawn and subjected to acid enrichment, neutralization, and drying. Calcium nitride is a red-brown, crystalline solid made up of calcium and nitrogen. Il possède une structure anti-bixbyite comme le Mn 2 O 3 sauf que la position des ions est inversée, ainsi la calcium prend la position du manganèse et l'azote celle de l'oxygène. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. To make it, combine nitric acid to any limestone. Calcium is an important component of the cell walls and proper supply of calcium is essential to plant development. At that as the haloid salt use the complex fluoride salts of the following alkaline metals:Na2SiF6, Na3AlF6, KBF4, Na2TiF6. The zinc-calcium alloy contained in the first tank 19 contains, in mass proportions 1/3 of zinc and 2/3 of calcium. Solid Calcium reacts with Nitrogen gas to produce solid calcium Nitride what is the balanced equation with conditions? It also ensures alloy by electrolysis, combined with the method of synthesis of calcium nitride, and therefore lowers the cost of Isberg is to manufacture the exception of a few expensive stages of a conventional method of obtaining calcium. J. This compound then crystallizes and forms a salt compound. Zinc, recyclery into the cell, exposed to pollution nitride, calcium, or calcium oxide (Cao). Boron nitride thus produced has graphite-like hexagonal structure at graphitization index "g" =1.7-2.5 and purity no less than 98.0 mass-% BN. These relative weights computed from the chemical equation are sometimes called equation weights. One of the main advantages of using the zinc-calcium alloy is that it has a much lower melting point than pure calcium, which contributes to the atomization of the droplets, and that, therefore, provides a higher yield of the reaction is obtained by increasing the contact surface between the calcium and nitrogen. Description of specific variants of embodiment of the invention. In addition, they have the appropriate voltage decay (0.40 In for Ca3N2and a 2.75 In for Cao), which is below the voltage decay CaCl2(3.30 In). The method of synthesis according to any one of claim 2 and 3, characterized in that zinc is collected by condensation or distillation in the course of the method, re-use to obtain a new alloy. It can be produced by direct reaction of the elements: In accordance with a development of the invention the zinc-calcium alloy is sprayed into the upper part of the reactor in the form of droplets, and the height of the reactor is adjusted to the kinetics of the reaction, so that a significant fraction of the calcium contained in the droplets, NITRILES drop the last. Prepare a mixture consisting of not less than 1 mass% of the powder of amorphous nitride of silicon, alpha- and/or beta-nitride of silicon, with not less than 30 mass% of the powder of an explosive. Liquid zinc is collected in the bottom of the reactor 6 and is removed through a drain valve 9. Asked by Wiki User. Similarly, the presence of a small amount of oxygen in the reactor, especially after a light pollution IP is althemore industrial nitrogen, Metallic shell with blend and inflammation composition is installed in cavity of heat-and electro-insulation perforated washers with centrally oriented coaxially installed output leads. Any contamination nitride, calcium or calcium oxide is eliminated, when there is electrolysis. le nitrure de calcium formé est recueilli dans un collecteur à la partie inférieure du réacteur. 2, pages 1514-1517, 1996). The reaction products are collected in the lower part of the reactor 6 and possibly on the side walls of the reactor 6. It is also made when calcium burns in air. Other advantages and characteristics will become more apparent from the following description of specific variants of embodiment of the invention, carried away is the only non-limiting examples and represented in the accompanying drawings, The produced calcium nitride is collected in the collection apparatus in the lower part of the reactor, and zinc contained in the drips, is evaporated and condensed on the cold walls of the reactor. In addition, as shown in figure 1, calciopoliana zinc-calcium alloys have a temperature of prawle the Oia much below the melting temperature of pure calcium. 9. 12. 5, pages 497-503) shows that the melting point of calcium nitride is close to 1450°and that it decomposes only at temperatures of about 1600°C. The study of the kinetics of the nitriding reaction, however, was not allowed to develop industrial method of producing nitride calcium. Vanadium nitride, VN, was prepared by placing one gram of vanadium powder (Aldrich, 325 mesh, 99.5%) in an alumina crucible inside a 1 in. The reason is that the molar mass of the substance affects the conversion. Once you do this, it becomes a compound known as double salt. Thus, during the initial stage of sputtering a zinc-calcium alloy is preferably spraying the latter with an argon stream before replacing the argon stream on nitrogen stream. For argon the first and second pressure control valves 20 and 21 according to the public are set at an absolute pressure of 4 bar and 1.5 bar, The present invention relates to a method of synthesis of calcium nitride, whereby the nitrogen reacts with the calcium source in the reactor. When the reaction begins, the heat raises the temperature of the nitrogen to a temperature close to the initial temperature drops sputtered in the reactor 6. Calcium nitrate is a synthetic chemical mixture of two inorganic compounds—calcium and nitrogen. common chemical compounds. The technical result of the invention is simplification of the method of the synthesis of calcium nitride and the reduced cost. To complete this calculation, you have to know what substance you are trying to convert. The zinc-calcium alloy is then obtained by electrolysis of calcium chloride, or CaCl2in the electrolytic cell 11 connected to the current generator 12. SUBSTANCE: proposed method includes preparation of first mixture at ratio of boric acid to carbamide equal to 1:1 and second mixture at ratio of these components equal to 1:3 at deviation not exceeding 10%. Powder is placed into reactor, which is filled with nitrogen to pressure 1 to 20 MPa. The collector device 7 (figure 2), located in the lower part of the reactor, collects drops at the end of their fall and supports at a temperature of at least 650°so that the nitriding reaction could proceed at the level of the collector device. The movement of nitrogen and argon to the furnace 24 is carried out through the inlet pipe 26, which is connected to the second and third tanks 19 and 25 through the three-way valve 27. The specified excess can be significantly reduced when using a reactor capable of operating continuously with a high temperature inside the reactor. After that, add ammonia. If the temperature falls back to the solidification of calcium, the reaction is terminated, but in a significantly slower form when the initial pattern formed by the chips with a large specific surface, turns into a mass of agglomerated calcium and calcium nitride with a small specific surface area and a large thickness, significantly slowing down the reaction. The cell 11 is formed by the anode 13, preferably made of graphite, and the cathode 14 formed a bath of molten zinc. He found that the compound obtained has a chemical composition of Ca3N2and density 2,63. Calcium is actually covered immediately after the start of the experiment very dense viscous layer of dark blue nitride with a metallic sheen, greatly slowing the reaction rate. This change of the kinetics of the reaction corresponds allotropical conversion of calcium nitride, which passes from the quadratic structure in the cubic structure. Fertilizer grade CAN contains roughly 8% calcium and 21-27% nitrogen. 3Ca (s) + 2N 2 (g) → Ca 3 N 2 (s) Nitrogen is a macro element, required by plants in large quantities. Sinters of first and second mixtures are mixed at ratio of (2.9-3.1):1, respectively. SUBSTANCE: borazon and wurtzite-like boron may be used as materials for parts of high-pressure apparatus and tools in treatment of wear-resistant materials, first in sharpening heat-treated steels, gray and high-strength cast irons, tungsten-containing hard alloys, reinforced concrete, stone and plastics. EFFECT: enhanced operational and economical efficiency. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. Chlorine in an airtight vessel and metallic gallium are put into the first container, and lithium nitride and ammonia in an airtight vessel are put into the second container. Use any explosives, allowing during detonation of the charge mixture to create pressure not below 15 GPa and temperature not less than 2000°C, for example, cyclotrimethylenetrinitramine, cyclotetramethylenetetranitramine, trinitrotoloul, trinitrophenylmethylnitramine, tetranitropentaerytrite. Note that rounding errors may occur, so always check the results. Thus obtained ultrafine gallium nitride powder, in order to complete removal of impurities, is further subjected to chemical treatment in hydrochloric or sulfuric acid solutions followed by washing with distilled water. This prevents local narisovanie calcium in the beginning of the method, which can lead to clogging of the nozzle. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. Other researchers have replaced pure calcium, industrial uneconomical, calcium, industrially produced in the form of chips, and observed that the nitriding reaction was begun temperature below 600°and that it was necessary to increase the temperature above 650°and preferably up to 700°to be significant the kinetics of the reaction. As shown in figure 4, the device 1 for carrying out the synthesis of calcium nitride, includes a first container 16, is equipped with a heating device 17, designed to save the zinc-calcium alloy 18 molten in the first tank 16. contained in the droplets, then reacts with the nitrogen in the reactor 6 with the formation of calcium nitride. Sinters are mixed under conditions of premolding at grinding to size of particles lesser than 2 mm. Mixture of sinters is subjected to nitrifying at temperature of 1810-1850°C; heating is performed at rate of 50-60/min. Evaporation of zinc in the nitriding process calcium and its subsequent condensation on the walls of the reactor also facilitate heat transfer out from the reactor and therefore provide increased performance without excessive overheating of the reactor. Calcium nitride is available from the direct reaction of calcium metal with nitrogen gas. The zinc-calcium alloy can be obtained by melting a mixture of powders or chips of zinc and calcium. See answer plshelpme21 is waiting for your help. The method of synthesis, therefore, is carried out with an excess of nitrogen is more than 100% compared to the minimum required for the reaction. In terms of electrons, explain why calcium is the reducing agent. YaraLiva fertilisers are a range of calcium nitrate based fertilisers combining fast acting nitrate nitrogen alongside strength-building calcium and boron, designed for high value quality field crops to improve the size, strength, appearance and importantly marketable yield. In particular, the electrolysis of calcium chloride can be improved by the introduction of various fluxes, and he may be replaced by electrolysis of calcium oxide. The specified device is preferably a device for introducing an inert gas, such as argon. McHale et al., Chem. It is a red-brown solid. Overview and Key Difference 2. The device 1 includes a power reactor 6 nitrogen (not shown in figure 2), and the flow of nitrogen nutrition is carried out continuously in order to maintain a given pressure in the reactor. The chemical equation is: This is not yet balanced; just add a coefficient of 3 to Ca on the reactant side to balance the equation. The method of synthesis according to item 12, wherein the collector device is maintained at a temperature greater than or equal to 650°C. In the work of V. Pitkin and C.B. There’s no possible dicalcium dinitride etc that needs to be distinguished between. FIELD: chemical industry; other industries; methods of the synthesis of calcium nitride. Zinc is collected at the bottom of the reactor 6 may be then introduced into a bath of molten zinc containing cathode 14 through a drain valve 9 and the exhaust pipe 15 to be reused for new alloy. It is a building block of the chlorophyll and of amino acids. Eur. Molecular weight calculation: 40.078*3 + 14.0067*2 ›› Percent composition by element. Chemical name:Calcium Ammonium Nitrate Standard:Q/140706CSC003-2005 Molecular formula: 5Ca(NO3)2•NH4•NO3•10H2O Molecular weight:1080.71 Property:White round granulation,soluble in water Use:Calcium is a new type of nitrogen and quick and efficient compound fertilizer which is widely used in greenhouses and large areas of agricultural land. a method for calcium nitride synthesis which consists in spraying in form of droplets, by means of a sprayer, a molten zinc-calcium alloy into a reactor containing nitrogen at high temperature. If the calcium nitride contaminated sediment zinc, zinc can be easily removed by vacuum distillation, for example, using the advantages of a large difference between the boiling point of zinc, which is 907°and the melting point of calcium nitride, which is 1450°C. The method of synthesis according to claim 1, characterized in that the zinc contained in the zinc-calcium alloy, heat evaporates, vysvobozhdavshikhsya the process of nitriding reaction of calcium This site explains how to find molar mass. Silicon nitride thus obtained represents β-Si3N4 or mixture of α- and β-Si3N4 with 39.0-39.5% nitrogen and not more than 0.03% iron impurities. Side by Side Comparison – Calcium Ammonium Nitrate vs Ammonium Nitrate in Tabular Form 5. The specified pollution, however, can be easily eliminated by heating to a temperature above 700°Since, it is known that in fact a mixed nitride of Ca2ZnN2decomposes at temperatures above 700° (J.M. The method consists in sputtering in the form of the drips by means of the sprayer of the fused zinc-calcium alloy in the reactor containing nitrogen, which is previously heated up to the temperature of higher or equal to the melting point of the zinc-calcium alloy. (Z. Anorg. the according to the present invention the objective is achieved by virtue of the fact that The method of synthesis according to claim 7, characterized in that the temperature of the zinc-calcium alloy and the temperature of the nitrogen is higher than 700°before the zinc-calcium alloy is sprayed. 11. Calcium Ammonium Nitrate. EFFECT: it is provided simplification of technology and reduction of products self-cost. The nitriding reaction is actually vysokotekhnologicheskoi, respectively, giving about 425 kJ per mol nitride calcium (Ca3N2), which corresponds to theoretical adiabatic temperature above 4000°C. 3. The use of the zinc-calcium alloy as a source of calcium in the method of nitriding is especially interesting, because, as was noted in R. Juza et al. Calcium nitride powder possesses the characteristics of high purity and uniform particle size distribution. The reactor 6 is also equipped with a tool that provides heating and/or cooling of the vertical walls of the reactor 6. Various analyses can be conducted to determine the composition of the fine powder and, in particular, elements, polluting the calcium nitride. Method of preparing ultrafine gallium nitride powder comprises combusting mixture of powdered gallium-containing compound with high-exothermic pulverized metal in a gas medium, said gallium-containing compound being liquid gallium metal or gallium oxide and said high-exothermic pulverized metal being aluminum, while, as gas medium for combustion, atmospheric air is used. The nitrogen is heated to a temperature greater than or equal to the melting point of the zinc-calcium alloy. 5. Thus obtained zinc-calcium alloy is then transported into the furnace 4 through the supply pipe 3 and is entered and processed in the reactor 6 according to figure 2. It can be equipped with a system for measuring the calcium content and be able to adjust this content a introduction of calcium or zinc, depending on the particular circumstances, to obtain the desired zinc-calcium alloy. During the initial phase of the method of synthesis it is necessary to avoid static contact between the zinc-calcium alloy and nitrogen. The technical result of the invention is the fact, that the method allows to synthesize the base products with the nitration degree close to 1, and also to produce the powders of nitrides of the high-degree purity and the improved crystal structure. Element : Symbol : Atomic Mass # of Atoms : Mass Percent: Calcium: Ca: 40.078: 3: 81.104%: Nitrogen: N: 14.0067: 2: 18.896% ›› Calculate the molecular weight of a chemical compound. The SI base unit for amount of substance is the mole. Purified nitrogen gas was flowed across the sample while it was heated to 1050 °C for 15 … The calcium nitride, obtained in the reaction may be in the form of an agglomerate, which can be crushed after retrieval from the collecting device 7. The first tank 19 is heated at a temperature of about 450°in order to maintain the zinc-calcium alloy at a temperature above its melting temperature, which is approximately 420°C. What is Calcium … Convert grams Calcium Nitride to moles  or  moles Calcium Nitride to grams, Molecular weight calculation: © Patent search, search for pacenow for inventions - russianpatents.com 2012-2019, The invention relates to methods for synthesis) cubic boron nitride (CBN) in the form of crystals at high pressure and temperature in the region of thermodynamic stability of the CNS, and can be preferably used in the tool industry, The invention relates to methods of obtaining the highly rigid materials, namely the synthesis of cubic boron nitride used for the manufacture of abrasive tools on organic, ceramic and metallic ligaments, and also for manufacturing blade tool, The invention relates to the metallurgy of refractory compounds, in particular the production of boron nitride, The invention relates to metallurgy and can be used to obtain high-purity powder of niobium nitride and making him high strength, non-corrosive products, Method of production of the powders of the chemical elements nitrides, Method of production of boron nitride of graphite-like hexagonal structure, Method of manufacture of polycrystal superhard material, The method of obtaining a composite material, The way to obtain cubic boron nitride of high strength, Method of the synthesis of calcium nitride, Ultrafine gallium nitride powder preparation method, Method of obtaining of cubic silicon nitride. A blend briquette is manufactured from homogenous mixture of sodium azide, sodium tetraborate, and magnesium powders at weight ratio 29.7:26.9:43.4 or that of sodium azide, sodium tetraborate, lithium carbonate, and magnesium at weight ratio 24.3:21.1:9.3:45.3, or the same of sodium azide and magnesium diboride at weight ratio 60:40. condenses on the cold walls of the reactor and is collected in the lower part of the reactor. The method of synthesis according to claim 8, characterized in that the flow stream of nitrogen is greater than or equal to the quantity necessary for the complete nitriding of calcium contained in a spray zinc-calcium alloy. 6. In accordance with one feature of the invention, the zinc contained in the zinc-calcium alloy, evaporates the heat released in the process of nitriding reaction of calcium condenses on the cold walls of the reactor and is collected in the lower part of the reactor. Uses. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. This colourless salt absorbs moisture from the air and is commonly found as a tetrahydrate. 3 4 5. 4. The resulting very thin film, which corresponds to the increase in mass of less than 10 mg/cm3that is a very hundred is strong. The chamber is then evacuated and sealed. Using the prefixes mono-, di-, tri- etc are important when 2 non-metals bond, … EFFECT: the invention ensures synthesizing of the base products with the nitration degree close to 1, production of the high-degree purity powders of nitrides with the improved crystal structure. Answer. 127, pages 497-501). Chem., 239, p. 273, 1938), gallium nitride, zinc (Zn3N2) cannot be formed by direct reaction of hot metal zinc on nitrogen. Difficulties arise as soon as trying to speed up the reaction by increasing the flow of nitrogen is provided in contact with the calcium. EFFECT: simplified gallium nitride powder synthesis technology and enabled utilization of air as nitrogen-containing reagent. SUBSTANCE: invention is directed to preparation of gallium nitride powder that could be used as ceramics component when manufacturing semiconductor members of structures. The reaxtion between calcium and nitrogen to form calcium nitride is a redox reaction. sublimated at a given temperature, and the expected freeze-dried substance is zinc; - determination of mass loss after heating in vacuum is carried out at a temperature of about 1100°in order to know the proportion of substances, sublimated at a given temperature, and the expected freeze-dried substance is zinc and the fraction nentriesinuse or non-oxidized calcium; - determination of the weight increase after annealing the sample, the pre-heated in vacuum at 1100°in order to know the proportion of the substances reacted with the oxygen in the air, and expected substance reacted with oxygen, is the calcium nitride; - x-ray analysis of the sample, properly protected from air, in order to determine possible contamination of the calcium nitride. traduction calcium nitride [Ca3N2] dans le dictionnaire Anglais - Francais de Reverso, voir aussi 'calculus',cal',claim',calcified', conjugaison, expressions idiomatiques It is prepared mixture, containing chrome oxide (III) in amount 0.7-1.8 mol % and chrome powder - the rest. From the prepared mixture press the charge mixture, place it in an airtight explosive chamber and initiate a detonation. The formula unit for calcium nitride is Ca3N2. The specified buffer capacity may be fed alternately from multiple sources of calcium and zinc. SUBSTANCE: reaction chamber is in form of two containers joined together. The zinc-calcium alloy, driven by compressed nitrogen or argon, preheated to a temperature of greater than or equal to the melting point of the zinc-calcium alloy is injected, thus, the nozzle 33 in order to form droplets 34 in the reactor 6 containing nitrogen. Calcium nitrate, also called Norgessalpeter (Norwegian saltpeter), is an inorganic compound with the formula Ca(NO 3) 2. 3Ca + N2 → Ca3N2 A second method is through the loss of ammonia by thermal decomposition of a metal amide, shown here with barium amide. The fact that nuclear calcium content in the zinc-calcium alloy for the correct reaction is high, may require the installation of a buffer tank between the place where it turns out the zinc-calcium alloy, and reactor. 13. II, No. It is made by burning calcium in nitrogen. The temperature of the zinc-calcium alloy and nitrogen are preferably higher than 700°With inlet nozzle 33 before the zinc-calcium alloy raspy aetsa in the reactor under the action of a jet of argon. can give calcium oxide, which, in turn, susceptible to trapping of liquid zinc. the resulting calcium nitride is collected in a collector unit at the lower part of the reactor. Its chemical formula is Ca 3 N 2. For example, the method of synthesis of calcium nitride is carried out in such a device, the device presented in figure 4. Since the nitriding reaction is extremely exothermic, it gives a rapid increase in the wall temperature of the reactor 6, and may be the appearance of a flame having a length of about 10 cm and a diameter of a few millimeters. For example, the zinc-calcium alloy is an alloy containing a mass proportion of one-third of the zinc by two-thirds of calcium, and the melting point of this alloy is approximately 420°C. The method of synthesis of calcium nitride, whereby the nitrogen reacts with the calcium source in the reactor, wherein the source of calcium is molten zinc-calcium alloy, and that the nitrogen is heated to a temperature greater than or equal to the melting point of the zinc-calcium alloy. 7. Preparation. What is Calcium Ammonium Nitrate 3. 50 g/min of calcium contained in the alloy). The zinc-calcium alloy and nitrogen, respectively, are heated in the first and third tubes 22 and 29, so that they both go into the oven 24 at a high temperature before spraying the spray 33. Each mixture is heated to temperature not below 400°C at rate of heating of 120-140°C/h. The vessel containing chlorine is then opened and the first container is heated to 210-220°C. A briquette made of inflammation composition containing copper oxide, boron, and nitrocellulose at weight ratio 89.9:8.1:2.0 is joined with above blend briquette. It has various isomorphs forms, and α-calcium nitride is more commonly encountered. The experiments conducted for 50 hours at 600°'t show no further reaction. The nozzle 5 may be of any type. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. Calculate the molecular weight Fig. That would be 3 atoms of calcium and 2 atoms of nitrogen, for a total of 5 atoms in a formula unit. When there is current, the bath of molten zinc is gradually enriched with calcium, whereas the anode 13 collects chlorine formed during the electrolytic reaction. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. So, you can: chemical analysis to determine the proportions of zinc relative to the calcium contained in the powder; - determination of mass loss after heating in vacuum is carried out at a temperature of approximately 800°order proportional to know what s the matter, The substance of the invention consists, that the method of production of the powders of nitrides provides for preparation the exothermal mixture consisting of the azotizing chemical element, the inorganic azide and the haloid salt and the mixture ignition in the nitrogen medium under pressure. When studying the reaction kinetics of the nitriding of bulk calcium in the work of J. Aubry and R. Streiff (Rapports and l'academie des Sciences, 1966, Vol. on which: figure 1 shows the phase diagram of the zinc-calcium alloy with respect to atomic zinc content; figure 2 presents the diagram of the first variant embodiment of the device, allowing the synthesis method according to the present invention; figure 3 presents a diagram of a second variant embodiment of the device, allowing the synthesis method according to the present invention; figure 4 presents a diagram of a third variant embodiment of the device, allowing the synthesis method according to the present invention. FIELD: manufacture of polycrystal superhard materials on base of dense modifications of borazon and wurtzite-like boron. It exists in various forms (isomorphs), α-calcium nitride being more commonly encountered. Calcium nitrate provides 100% water-soluble calcium. The chamber is sealed again and the containers are separated. The zinc-calcium alloy is produced by the electrolysis of calcium chloride in the electrolyzer, which cathode is the solution containing the fused zinc. Calcium nitride is the inorganic compound with the chemical formula Ca 3 N 2. In another variant embodiment of the invention, the zinc-calcium alloy can be sprayed in the form of small droplets, driven by compressed nitrogen, heated to the temperature close to the temperature of melted and sprayed zinc-calcium alloy. The method of synthesis according to claim 1, characterized in that the atomic concentrations of calcium in the zinc-calcium alloy is greater than or equal to 50%. In the process of nitriding reaction, which is very exothermic, the zinc contained in the sprayed droplets is vaporized heat released in the process, the nitriding reaction of calcium, and is condensed on the cold walls of the reactor 6 in the form of drops 8 liquid zinc presented lo the Ana line in figure 2. He may be re-submitted in a container 2 containing molten zinc-calcium alloy to be used for new alloy. It reacts with water to make calcium hydroxide and ammonia. When working serial udovaniya flows of nitrogen, between which is provided the cooling of calcium to about 650°S, can be achieved full narisovanie calcium. Finding molar mass starts with units of grams per mole (g/mol). Fine dark brown powder containing calcium nitride, is deposited at the bottom of the reactor 6. 26 g/min of nitrogen) and 75 g/min (i.e. The zinc-calcium alloy preferably has an atomic calcium content greater than or equal to 50% and, in particular, it ranges from 50 to 80%. The zinc contained in the zinc-calcium alloy, then evaporate during the reaction and then condenses on the upper parts of the walls of the reactor. Calcium nitride is a solid brown nitride powder and an inorganic compound with constituent elements calcium and nitrogen and represented by the chemical formula Ca3N2. Browse the list of 1 mole is equal to 1 moles Calcium Nitride, or 148.2474 grams. It reacts with hydrogen to make calcium hydride and calcium amide. 1 shows the X-ray diffraction patterns of the carbon nitride material. EFFECT: the invention ensures simplification of the method of the synthesis of calcium nitride and the reduced cost. whereas for nitrogen the third pressure reducing valve 30 is set at an absolute pressure of 4 bar. Calcium content in the fruit is key for fruit firmness and quality. 209 calcium nitrate products are offered for sale by suppliers on Alibaba.com, of which nitrate accounts for 20%, nitrogen fertilizer accounts for 15%. SUBSTANCE: the invention is pertaining to production of the refractory materials and may be used in aerospace industry, chemical metallurgy, tool-and-die industry and other industries for the synthesis of the powders of the chemical elements nitrides used for manufacture of the products having the high thermal stability, hardness, wear-resistance, erosion resistance, resistance to the corrosive mediums action, stability of the physical properties in the wide temperature ranges and used in the various engineering fields. Borazon and wurtzite-like boron are placed in reaction cell layer-by-layer perpendicularly to cell axis; composition of one layer differs from that of adjacent layer in content of wurtzite-like boron and borazon; graininess of borazon ranges from 3/2 mcm to 200/160 mcm. made of molten zinc. FIELD: production of super-hard materials, l-boron in particular. As a result the first container contains unneeded impurity substances, and the second contains solid gallium nitride. The zinc-calcium alloy is then sprayed in the form of droplets through the nozzle 5 located on the border of the furnace 4 and the top of the reactor 6. The method of synthesis according to claim 8, characterized in that in the initial phase, the zinc-calcium alloy is pre-atomized injection of a jet of compressed argon, heated to the temperature close to the temperature of the sprayed zinc-calcium alloy. Burning reaction is the locally initiated and, at the end of it, nitrogen pressure is lowered to 0.1-20 MPa and diazotation reaction is conducted for 0.1-0.5 h. Cooled product is disintegrated and subjected to magnet separation for 0.5-1.0 h to separate iron, after which dissolved in 15-30% HCl. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. Undissolved precipitate is separated, washed, and dried. Calcium is vital for some plants to be able to produce seeds, and it also helps a plant to produce a better quality of fruit with a longer shelf life. Calcium nitrate contains both calcium and nitrogen, which are nutrients plants require to survive. The reaction of calcium metal and nitrogen gas produces calcium nitride. The zinc-calcium alloy 18 contained in the tank 16, preferably chosen so that the s to have the lowest possible melting point. The nitrogen is heated to a temperature greater than or equal to the melting point of the zinc-calcium alloy. The mass ratio between nitrogen and calcium respectively introduced into the reactor, is therefore of 0.5, whereas the mass ratio required for complete nitriding of calcium, is 0.23. The starting materials, lithium nitride and calcium nitride, were synthesized by the procedures described in Hunting et al. The atomizer is preferably spray 33, such as nozzles, supplied by the company Enami Spraying Systems. Two of polluting compounds are in fact easier zinc and come into contact with calcium chloride and dissolve in it. It can be used as a source of the reactive nitride … For large-scale production it is preferable to obtain the electrolysis of calcium chloride or OK the IDA calcium in the electrolytic bath and the cathode, After that the vessel containing lithium nitride and ammonium is opened and the second container is heated to 850-870°C. what source of calcium is molten zinc-calcium alloy, and the fact that the nitrogen is heated to a temperature above or equal to the melting point of the zinc-calcium alloy. Relevant threads zinc-calcium alloy and nitrogen at the inlet of the furnace 24 is regulated so that the amount of nitrogen included in the oven was greater than or equal to the amount necessary to ensure complete nitriding of the calcium contained in the zinc-calcium alloy. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. the Molten calcium is then covered with a nitride layer, which insulates it from the nitrogen, and the reaction stops almost completely. The third pipe 29 is equipped with a third pressure reducing valve 30, and the inlet pipe 26 of the furnace 24 contains a flow meter 31, located near the three-way valve 27, and heating the sleeve 32 located between the flow meter 31 and oven 24. Top Answer. The zinc may de repeatedly used for production of the other alloy. As soon as the supply of nitrogen is increased, the reaction is Oia is considerably accelerated, Used as borazon is wurtzite-like boron or mixture of wurtzite-like boron and borazon at its content 0f from 0 to 50 mass-%; process is performed at temperature of from 1500°C to 2200°C in field of their stability under isothermal conditions; temperature gradient of from 20°C/mm to 70°C/mm may be additionally created in direction of reaction cell axis. When ammonium chloride and group II metal fluoride are used together with each other their ratio will be (1-3):(3-1), respectively. Traductions en contexte de "calcium nitride [Ca3N2" en anglais-français avec Reverso Context : molar mass and molecular weight. Development of calcium stabilized nitrogen rich ... A compound of silicon nitride, β-sialon having a general formula of Si6 zAlzOzN8 z, is formed as a result of the chemical replacement of silicon–nitrogen bonds with aluminum–oxygen bonds[12]. Additive contains graphite and 40-50 mass-% of boron nitride. A common request on this site is to convert grams to moles. the Alloy, in addition, compressed argon, is supplied from the second tank 19 through the first and second pressure control valves 20 and 21. Before the detonation the charge mixture can be encased in a shell made from the specified explosive. Le nitrure de calcium est un solide cristallin rouge/brun composé de calcium et d'azote. [ 1 ] α-Calcium nitride is the commonly encountered form. The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. SUBSTANCE: invention relates to powder technology, particularly to receiving of materials, containing metal nitrides. Preharvest sprays of calcium nitrate reduced the physiological wt loss, completely checked rotting, incr the calcium content, and maintained pulp firmness and fruit quality of Flordasun peach during ambient storage up to 5 days. shalhassan shalhassan Answer: Calcium is a reducing agent because it loses electrons and oxidises itself but reduces other reactants. Resulting mix is ground to particle size not greater than 0.1 mm. FIELD: aerospace industry; chemical metallurgy industry; tool-and-die industry; other industries; methods of production of the powders of the chemical elements nitrides. causing the increase in temperature which exceeds the melting point of calcium, approximately 839°C. The molecular formula for Calcium Nitride is Ca3N2. SUBSTANCE: the invention is pertaining to the method of the synthesis of calcium nitride. Into the charge mixture it is possible to add up to 20 mass% of salts of metals with the density above 1.8 g/cm3. The furnace 24 is used to obtain the nitrogen supplied from the third tank 25, as well as argon, is supplied from the second tank 19. What is Ammonium Nitrate 4. The latter is transported by the supply pipe 3 into the furnace 4 where it is heated before and/or maintained at a predetermined temperature greater than or equal to its melting point. Calcium nitrate at 2.0% as a pre-harvest spray extended the shelf life in ambient storage of Flordasun peach fruits because of delayed onset of senescence. Calcium nitride is formed along with the oxide, CaO, when calcium burns in air. The nitrogen pressure inside the reactor is preferably regulated by a valve 36 located on one of the side walls of the reactor 6, and the device 1 may contain nitrogen manifold and recirculation system (not shown). A wide variety of calcium nitrate options are available to you, such as granular, powder, and prilled.
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