Synthesis of boron nitride by self-propagating reactions at high pressure

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb09056.x· OSTI ID:413333

Solozhenko, V L; Will, G ^[1]; Turkevich, V Z ^[2]

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1. Univ. of Bonn (Germany). Mineralogical Inst.
2. Ukrainian National Academy of Sciences, Kiev (Ukraine). V.N. Bakul Inst. for Superhard Materials

Peculiarities of the formation of BN in a self-propagating reaction between LiBF{sub 4} and Li{sub 3}N have been studied under a wide range of p,T conditions within the region of thermodynamic stability of cBN. Boron nitride crystallized mainly in the form of highly ordered hBN (1,700--2,100 K), of mesographitic BN (2,200--3,000 K), or of turbostratic BN (>3,000 K). Cubic boron nitride was obtained with a low yield (up to 14 vol%) as a result of precipitation from the metastable eutectic liquid in the BN-Li{sub 3}N system. These results give further evidence for an alternative metastable behavior in the BN phase formation under high pressures.

• Sponsoring Organization: Alexander von Humboldt-Stiftung, Bonn (Germany); Deutsche Forschungsgemeinschaft, Bonn (Germany)
• OSTI ID: 413333
• Journal Information: Journal of the American Ceramic Society, Vol. 79, Issue 10; Other Information: PBD: Oct 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORON NITRIDES
SYNTHESIS
LITHIUM FLUORIDES
BORON FLUORIDES
SODIUM NITRIDES
LITHIUM NITRIDES
CHEMICAL REACTIONS
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
THERMOCOUPLES
DIFFERENTIAL THERMAL ANALYSIS
X-RAY DIFFRACTION
OPTICAL MICROSCOPY
SCANNING ELECTRON MICROSCOPY
PHASE STUDIES