Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (10): 1101-1104.DOI: 10.3724/SP.J.1077.2011.01101

• Research Paper • Previous Articles     Next Articles

Synthesis of Boron Carbide Nano Powder by Solid State Reaction

ZENG Hong1,2, KAN Yan-Mei1, XU Chang-Ming1, WANG Pei-Ling1, ZHANG Guo-Jun1   

  1. (1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Shanghai 200050, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2010-12-17 Revised:2011-02-18 Published:2011-10-20 Online:2011-09-20
  • Supported by:

    National Natural Science Foundation of China (50972152, 51002169)

Abstract: Boron carbide (B4C) powder was synthesized by solid state reaction of hexagonal boron nitride with carbon black (or graphite). The phase assemblages of synthesized powders were influenced by carbon source, atmosphere and temperature. Boron carbide powder with an average particle size of about 100 nm was obtained using carbon black as the carbon source at 1900℃ for 5 h in vacuum. The relative density of the sintered sample (2000℃/30 MPa/1 h) derived from the synthesized powder reached 97.9%, while that prepared from the commercial powder was 93.1%. The better sinterability of the synthesized powder than the commercial one can be attributed to the finer particle size, lower oxygen content and the twin structure of the powder.

Key words: boron carbide, boron nitride, carbon black, nano powder

CLC Number: