Boron trichloride and hydrogen together with ammonia gas heated to a certain temperature, mixing

Boron trichloride, ammonia vapor deposition method obtained with boron trichloride with hydrogen and heated to a temperature of ammonia mixed in a predetermined reaction temperature required for abrasive grinding in the reactor, and then at a higher temperature, the heating was continued for an ammonia stream some time to prepare boron nitride products. The reaction equation is as follows:
Borax borax chloride method and pressure at 450 ℃ dehydrated ammonium chloride in 110 ~ 120 ℃ previously dried, crushed to 40 mesh respectively fineness. Anhydrous borax and ammonium chloride according to the mass ratio of the ingredients, mixing and compression molding. Then, give it away Polycrystalline diamond and pass into excess ammonia, carry out the reaction at 1050 ℃ generate coarse grain boron nitride, pulverized, sieved, washed with water, filtered and dried to obtain boron nitride products. The reaction equation is as follows: cubic boron nitride crystal abrasive grinding, can be used as raw material hexagonal crystal, adding magnesium, lithium hydride powder additive to participate in under high pressure high temperature reaction.