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Synthesis and Characterization of Nanocrystalline Boron Nitride

✍ Scribed by Jun-Qing Hu; Qing-Yi Lu; Kai-Bin Tang; Shu-Hong Yu; Yi-Tai Qian; Gui-En Zhou; Xian-Ming Liu; Jian-Xin Wu

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
132 KB
Volume
148
Category
Article
ISSN
0022-4596

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✦ Synopsis

Nanocrystalline boron nitride (BN) with a whisker-like morphology has been synthesized from the reaction of KBH 4 and NH 4 Cl at a temperature of 6503C and a pressure of about 22 MPa. The pressure is much lower than that of previous routes and the yield of nanocrystalline BN reached 70%. X-ray powder di4raction pattern indicated the coexistence of two structures of BN: hexagonal and cubic. Fourier transformation infrared spectroscopy was used to distinguish the sp 2 -bonded hexagonal and sp 3 -bonded cubic phase. X-ray photoelectron spectra analysis gave the average composition of B 1.01 N.

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