Boron Nitride and Silicon Nitride Systems
Final rept. Jun 90-Feb 91,
VIENNA UNIV (AUSTRIA)
Pagination or Media Count:
Information on phase equilibria and compound formation in the Li-B-N system all agree on the existence of a ternary compound Li3Bn2 with several pressure modifications. Heating powder compacts of Li3N BN in a Mo-boat in a stream of nitrogen between 650 to 700 C was claimed as optimal conditions to obtain Li3BN2 the reaction being strongly exothermic. Melting of Li3BN2 was reported at 870. Based on earlier preliminary data by the p-T diagram of Li3BN2 was investigated over the pressure and temperature range from 1.0 to 6.5 GPa and 300 to 1900 C employing optical and x-ray powder diffraction analysis.
- Physical Chemistry