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 melting point of 2200 ℃. Its grinding efficiency is higher than that of boron carbide and even higher than that of silicon carbide. It has characteristics such as water insolubility, oxidation resistance, thermal shock resistance, and chemical erosion resistance. Especially under thermal shock, it has high strength and stability—a black cubic crystal of calcium borate. Relative density 2.3. Insoluble in water, slightly soluble in concentrated sulfuric acid. It can react with strong oxidants such as fluorine, chlorine, nitric acid, hydrogen peroxide, etc., but slowly with alkali but firmly with oxidants. Preparation method: At 800 ℃, boron anhydride is reduced with calcium aluminide, or it can be obtained by reacting with calcium carbide.
Usage: Used as a high-conductivity copper deoxidizer, electronic material, alloy, etc. High-purity calcium borate CaB6 is a new high-tech material that can be used as a neutron radiation shielding filler for nuclear reactors, an additive for oxygen and sulfur removal in superconducting copper smelting, a super lightweight refractory, and boron steel for advanced military and defense industries. In the past, this material and its production technology were only mastered by a few developed countries abroad (Germany, the United States, and Japan), resulting in a very serious monopoly on product sales and alarming prices. Currently, the chemical method of self-propagating combustion is used abroad to produce high-purity calcium borate. This method has considerable pollution and low safety factor, requiring advanced chemical production processes and advanced production equipment to ensure environmental protection requirements, which will undoubtedly significantly increase production costs. Moreover, the products obtained by this method have the disadvantages of unstable product quality and volatile oxidation. If you are looking for high quality, high purity and cost-effective copper oxide, or if you require the latest price of copper oxide, please feel free to email contact mis-asia.
