Combustion synthesis of Si3N4 powder

Wei Chang Lee, Shyan Lung Chung

研究成果: Article同行評審

51 引文 斯高帕斯(Scopus)

摘要

A combustion synthesis (SHS) process has been developed for the synthesis of Si3N4 powder under low nitrogen pressures. Si and NaN3 powders were used as the reactants, and NH4Cl powder was added as a catalytic agent. These powders were mixed and pressed into a cylindrical compact. The compact was wrapped up with an igniting agent (i.e., Ti + C), and the synthesis reaction was triggered by the combustion of the igniting agent. Addition of NH4Cl was found necessary for the combustion synthesis reaction under low nitrogen pressures (<1.2 MPa). The product as synthesized is mostly in the form of agglomerated fine particles (0.1-1 μm in diameter) and is composed mainly of α-phase and a minor amount of β-phase. Effects of various experimental parameters (N2 pressure, NaN3, NH4Cl, and Si3N4 contents) on the product conversion and the combustion temperature were investigated. A possible reaction mechanism was proposed that explains the effects of the experimental parameters on the synthesis reaction.

原文English
頁(從 - 到)805-811
頁數7
期刊Journal of Materials Research
12
發行號3
DOIs
出版狀態Published - 1997 三月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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