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Contact letter about the name change of Mudanjiang Qianjin Boron Carbide Co., Ltd.

Contact letter about the name change of Mudanjiang Qianjin Boron Carbide Co., Ltd.

Dear Partners: Thank you very much for your long-term trust and support to us! "Mudanjiang Qianjin Boron Carbide Co., Ltd." due to development needs, on August 15, 2020 has been moved to Sichuan asbestos county and officially changed its name to "asbestos berson technology abrasives Co., Ltd.", since August 15, 2020 officially opened, special contact to your company, the content is as follows: 1. Due to the overall relocation, your company will have doubts about the product quality, service attitude and price of "Asbestos Bosen Technology Abrasives Co., Ltd.". We have made a commitment to this. On the basis of ensuring the product quality, there will be certain price concessions. Please discuss the specific price concessions with Huang Qian (General Manager 13069799077) in detail; 2. The relevant information of Asbestos Berson Technology Abrasive Co., Ltd. is as follows: Company Name: Asbestos Bosen Technology Abrasive Co., Ltd. Unified Social Credit Code: 915118243144104086 Company address: Zhuma Industrial Park, Huilong Township, Shimian County Legal Representative: Huang Baisen Bank: Asbestos County Sub-branch of Agricultural Bank of China Account number: 22544101040016478 Line number: 103677554411 Tel: 0835-8885118

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Application of Boron Carbide

Application of Boron Carbide

Control of nuclear fission Boron carbide can absorb a large number of neutrons without forming any radioactive isotopes, so it is an ideal neutron absorber in nuclear power plants, and neutron absorbers mainly control the rate of nuclear fission. Boron carbide is mainly made into a controllable rod in the nuclear reactor field, but sometimes it is made into powder because of the need to increase the surface area. During the Chernobyl nuclear accident in 1986, a front-line aviation regiment stationed in Tozuk, Russia, was all transferred to the east of Chernobyl, and helicopters of various types from Mi-8 to Mi-26 were immediately put into airlift missions. After the boron carbide is exhausted, ordinary sand is put in again. As the launch progresses, flying becomes much easier. After the helicopter dropped nearly 2000 tons of boron carbide and sand, engineers finally announced that the chain reaction in the reactor had stopped, and the total capacity of the helicopter was 5000 tons. [1] abrasive material Since boron carbide is a harder solid than silicon carbide or tungsten carbide, it has been used as a coarse sand abrasive material for a long time. Because of its high melting point, it is not easy to cast into artificial products, but through high-temperature melting powder, it can be processed into simple shapes. Used for grinding, grinding, drilling and polishing of hard materials such as cemented carbide and precious stones. Coating Paint Boron carbide can also be used as a ceramic coating for warships and helicopters. It is light in weight and has the ability to resist armor-piercing projectiles penetrating the hot-pressed coating into an integral protective layer. Nozzle In the arms industry can be used for the manufacture of gun nozzles. Boron carbide, extremely hard and wear-resistant, does not react with acid and alkali, high/low temperature resistance, high pressure resistance, density ≥ 2.46g/cm3; Microhardness ≥ 3500kgf/mm2, bending strength ≥ 400Mpa, melting point of 2450 ℃. Because the boron carbide nozzle has the characteristics of the above wear resistance and high hardness, the boron carbide sandblasting nozzle will gradually replace the known hard alloy/tungsten steel and silicon carbide, silicon nitride, alumina, zirconia and other materials. Other Boron carbide is also used in the manufacture of metal borides and the smelting of sodium boron, boron alloys and special welding.

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2018

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Physical and Chemical Properties of Boron Carbide

Physical and Chemical Properties of Boron Carbide

It does not react with acid and alkali solution, and has high chemical degree, neutron absorption, wear resistance and semiconductor conductivity. It is one of the most stable substances to acids and is stable in all concentrated or dilute acid or alkali aqueous solutions. With sulfuric acid, hydrofluoric acid mixed acid treatment, in the air at 800 DEG C calcination 21h, can be completely decomposed and the formation of carbon trioxide and boron trioxide. When there are some transition metals and their carbides coexist, there is a special stability. Boron carbide reacts strongly with the boron carbide powder to form metal borides at 1000~1100 ℃. in the presence of nitric acid

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2018

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Properties of boron carbide

Properties of boron carbide

Hard black shiny crystals. The hardness is lower than that of industrial diamond, but higher than that of silicon carbide. It is less friable than most pottery. It has a large thermal neutron capture cross section. Strong chemical resistance. Not attacked by heated hydrogen fluoride and nitric acid. Soluble in molten alkali, insoluble in water and acid. Relative density (d204)2.508~2.512. Melting point 2350 ℃. Boiling point 3500 ℃.

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