Synthesis and characterization of nanocrystalline boron nitride

Citation
Jq. Hu et al., Synthesis and characterization of nanocrystalline boron nitride, J SOL ST CH, 148(2), 1999, pp. 325-328
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF SOLID STATE CHEMISTRY
ISSN journal
0022-4596 → ACNP
Volume
148
Issue
2
Year of publication
1999
Pages
325 - 328
Database
ISI
SICI code
0022-4596(199912)148:2<325:SACONB>2.0.ZU;2-L
Abstract
Nanocrystalline boron nitride (BN) with a whisker-like morphology has been synthesized from the reaction of KBH4 and NH4Cl at a temperature of 650 deg rees C 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 diffraction pattern indicated the coexistence of two structures of B N: hexagonal and cubic. Fourier transformation infrared spectroscopy was us ed to distinguish the sp(2)-bonded hexagonal and sp(3)-bonded cubic phase. X-ray photoelectron spectra analysis gave the average composition of B1.01N . (C) 1999 Academic Press.