Preparation of high‐purity α‐Si3N4 powder via multifunctional synergistic catalysis and pretreatment method
Zhuang Yuan,
Xinqi Zhao,
Xiaohong Sun
et al.
Abstract:At present, the Si3N4 powder prepared is not pure enough. Therefore, this work introduces a novel method of preparing high‐purity α‐Si3N4 powder. Si3N4 powder with high α phase content was prepared via a unique two‐stage temperature‐rise (TSTR) process, using KCl and metal Co as dual catalysts through low‐temperature pretreatment for silicon powder and subsequent high‐temperature nitriding reaction. Molten KCl insulates silicon particles in three contact modes during low‐temperature pretreatment, promoting com… Show more
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