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  • Calcium hexaboride, a chemical called calcium borate, is mainly synthesized through carbothermal reduction, self-propagation, and other means. A material research institute in China and some universities have certain synthesis research technologies. Calcium hexaboride is a black-gray powder or particle. The melting point is 2230 ℃, the relative density is 2.33 g/cm, and it is insoluble in water at 15 ℃. Silicon boride is a glossy black-gray powder with a relative thickness of 3.0g/cm and a melti A calcium hexaboride-reinforced aluminum matrix composite was prepared. The preparation method uses an aluminum boron master alloy and pure calcium as the sources of elemental boron and calcium. The preparation method is to first melt the aluminum boron master alloy in a melting furnace and raise the temperature to 900-1300 ℃, then add pure calcium, keep it warm, and mechanically stir it evenly before directly casting it into ingots. Using this method to prepare calcium hexaboride-reinforced alu A calcium borate ceramic powder comprising the following steps: uniformly mixing and drying calcium oxide and boron powder and placing them in a high-temperature reaction furnace; Conducting vacuum treatment before heating treatment in the high-temperature reaction furnace; Reacting calcium oxide and boron powder at high temperature under vacuum and inert gas protection; Separating and purifying calcium hexaboride ceramic powder; The separated and purified calcium hexaboride ceramic powder is su Mixing; Mix boron carbide and calcium-containing raw materials in proportion, and various conventional mixing equipment can be used for the mixing process. The mixing time is determined based on the number of raw materials, generally not less than 30-60 minutes. The boron carbide can be commercially available abrasive grade boron carbide. The calcium-containing raw material can be at least one of calcium oxide, calcium hydroxide, calcium carbonate, calcium bicarbonate, and calcium oxalate, with Calcium hexaboride is a black solid. Hardness 9. Relative density 2.33, melting point 2373-K. It is stable in the air at high temperatures. Insoluble in hydrochloric acid, hydrofluoric acid, and dilute sulfuric acid. Does not react with water. It can be eroded by strong oxidants such as chlorine, fluorine, nitric acid, and hydrogen peroxide, and reacts slowly with alkali. At room temperature, there can be three states, powder, single crystal, and polycrystalline. Due to the characteristics of hi

Background and overview of calcium hexaborate

Calcium hexaboride, a chemical called calcium borate, is mainly synthesized through carbothermal reduction, self-propagation, and other means. A material research institute in China and some universities have certain synthesis research technologies. Calcium hexaboride is a black-gray powder or particle. The melting point is 2230 ℃, the relative density is 2.33 g/cm, and it is insoluble in water at 15 ℃. Silicon boride is a glossy black-gray powder with a relative thickness of 3.0g/cm and a melti

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Calcium hexaborate reinforced aluminum matrix composites

A calcium hexaboride-reinforced aluminum matrix composite was prepared. The preparation method uses an aluminum boron master alloy and pure calcium as the sources of elemental boron and calcium. The preparation method is to first melt the aluminum boron master alloy in a melting furnace and raise the temperature to 900-1300 ℃, then add pure calcium, keep it warm, and mechanically stir it evenly before directly casting it into ingots. Using this method to prepare calcium hexaboride-reinforced alu

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Uses of calcium borate in various fields

A calcium borate ceramic powder comprising the following steps: uniformly mixing and drying calcium oxide and boron powder and placing them in a high-temperature reaction furnace; Conducting vacuum treatment before heating treatment in the high-temperature reaction furnace; Reacting calcium oxide and boron powder at high temperature under vacuum and inert gas protection; Separating and purifying calcium hexaboride ceramic powder; The separated and purified calcium hexaboride ceramic powder is su

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Preparation method of calcium borate

Mixing; Mix boron carbide and calcium-containing raw materials in proportion, and various conventional mixing equipment can be used for the mixing process. The mixing time is determined based on the number of raw materials, generally not less than 30-60 minutes. The boron carbide can be commercially available abrasive grade boron carbide. The calcium-containing raw material can be at least one of calcium oxide, calcium hydroxide, calcium carbonate, calcium bicarbonate, and calcium oxalate, with

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Application of calcium hexaborate

Calcium hexaboride is a black solid. Hardness 9. Relative density 2.33, melting point 2373-K. It is stable in the air at high temperatures. Insoluble in hydrochloric acid, hydrofluoric acid, and dilute sulfuric acid. Does not react with water. It can be eroded by strong oxidants such as chlorine, fluorine, nitric acid, and hydrogen peroxide, and reacts slowly with alkali. At room temperature, there can be three states, powder, single crystal, and polycrystalline. Due to the characteristics of hi

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