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Chinese Journal of High Pressure Physics  > 2002  >  16(4): 301-304 .
ZHAO Hong-Mei, XU Xiao-Wei, LI Yu-Ping, WANG Bi-Yan. Reaction Mechanism of Na2B4O7 with NH4Cl in hBN Synthesis[J]. Chinese Journal of High Pressure Physics, 2002, 16(4): 301-304 . doi: 10.11858/gywlxb.2002.04.011
Citation: ZHAO Hong-Mei, XU Xiao-Wei, LI Yu-Ping, WANG Bi-Yan. Reaction Mechanism of Na2B4O7 with NH4Cl in hBN Synthesis[J]. Chinese Journal of High Pressure Physics, 2002, 16(4): 301-304 . doi: 10.11858/gywlxb.2002.04.011
shu

Reaction Mechanism of Na2B4O7 with NH4Cl in hBN Synthesis

doi: 10.11858/gywlxb.2002.04.011
  • 1.

    Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China;

  • 2.

    Applied Science School, University of Science and Technology Beijing, Beijing 100083, China

More Information
  • Corresponding author: ZHAO Hong-Mei
  • Received Date: 12 Dec 2001
  • Rev Recd Date: 02 Mar 2002
  • Publish Date: 05 Dec 2002
    Abstract
  • The reaction mechanism in synthesis of hBN using Na2B4O7 and NH4Cl as the raw materials in the gas of NH3 under high-temperature and pressure was studied. The main function of NH4Cl in the reaction is to form a layer of membrane of high melting-point which can prevent Na2B4O7 particles from assembling. Meanwhile the NH3 gas provides much active molecules at high temperature to increase reaction ratio in the synthesis of hBN, and the newly formed hBN exists as separator stopping the appearance of glass phase.

     

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    • References(9)
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