Boron Nitride Revisited.

• Will G.

  Mineralogical Institute, Bonn University

• Nover G.

  Mineralogical Institute, Bonn University

• Gönna J. von der

  Mineralogical Institute, Bonn University

Abstract

The phase diagram published by Bundy & Wentorf [2] already shows cBN to be the stable fonn of boron nitride, in contrast to similar diagrams used today. This picture is supported by theoretical calculations by Maid et al. [5] and Solozhenko [6]. Results of compressibility measurements for cBN and hBN are presented . To clarify the picture of the phase diagram the transformation from hBN to cBN has been studied in a series of time dependent diffraction experiments using synchrotron radiation. The crystallization is found to go through the melt. In a second series of experiments the back-transformation of cBN to hBN was studied . Finally the experimental conditions for high pressure! high temperature synthesis of cBN could be lowered to 2. 5 GPa at 1800°C using amorphous boron nitride as starting material.

Journal

• The Review of High Pressure Science and Technology

  The Review of High Pressure Science and Technology 7 975-979, 1998

  The Japan Society of High Pressure Science and Technology

Keywords

• Condensed Matter Physics
• General Materials Science
• General Chemistry

Details

• CRID: 1390001204382475008
• NII Article ID: 10002692481
• NII Book ID: AN10452913
• DOI: 10.4131/jshpreview.7.975
• ISSN: 13481940
• ISSN: 0917639X
• NDL BIB ID: 4494118
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4494118
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed