Synthesis of boron nitride


There are many ways to prepare hexagonal boron nitrides, such as the boron method, boric acid method, borate method, boron halide method, etc... The basic principle is that boron compounds (such as boric acid, boron, boron halide, and other borates) and nitrogen compounds (such as ammonia, urea, ammonia chloride, melamine, etc.) together through heating reaction, manager treatment to obtain different purity hexagonal boron nitride. The main methods of synthesis of hexagonal boron nitride in China are borax-ammonia chloride, borax-urea, borax - melamine. Borax - ammonia chloride process. The dehydrated borax is mixed with ammonia chloride, and the reaction is heated in the ammonia gas flow. The product obtained from the response is broken, soaked with dilute hydrochloric acid, replaced with dilute hydrochloric acid, and washed, filtered, dried, and crushed by non-ionic water many times. The fineness of the product can be obtained. Borax and urea method. The dehydrated borax and urea will be mixed in an ammonia gas flow heating reaction; the reaction product, after crushing, will be soaked with dilute hydrochloric acid and then replaced with dilute hydrochloric acid, and then after several times of non-ionic water washing, filtration, drying, grinding value requirements fineness, can get finished hexagonal boron nitride. Borax - melamine process. The dehydrated borax is mixed with melamine, and the reaction is heated in ammonia flow. After the response, the product is treated with physical and chemical treatment (without washing or environmental protection). The finished product can be obtained from hexagonal boron nitride—coating materials and the lubricants industry. Hexagonal boron nitride has excellent lubrication properties, low friction coefficient, and excellent self-lubrication performance, especially at high temperatures still has excellent self-lubrication, so it is widely used in coating materials, release agents, and the lubricants industry. If you are looking for high quality, high purity and cost-effective boron nitride, or if you require the latest price of boron nitride, please feel free to email contact mis-asia.

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