Boron oxide is obtained by melt spinning fibers of boron trioxide

Method boron nitride fibers: boron oxide is obtained by melt spinning fibers of boron trioxide, and at temperatures above 350 ℃ heating in synthetic diamond powder to form boron amine, ammonia, and then further at 1800 ℃ high temperature sintering pure fibers. To obtain composite fiber, you need to borane, grinding wheel, boron trichloride reaction gas in a hot tungsten filament chemical vapor deposition on the can. Boron or Polycrystalline diamond first synthesized polymer, and then at about 100 ℃ be melt-spun. After spinning in ammonia sintering, 1000 ℃ when the fiber was black, if ammonia is further sintering temperature at 1200 ℃ brown, 1400 ℃ to white.
Products made with this method, the residual small amount of unreacted starting material. In the laboratory in order to obtain a small amount of high-purity boron nitride, boron halide and ammonia can react to the system.