Abstract Micron-sized β -Si 3 N 4 powders with tailored morphology were successfully synthesized by carbothermal reduction–nitridation (CRN) strategy. β -Si 3 N 4 granules with low aspect ratios were prepared with 10 mol% of CaO additive and the size of particles could be regulated by altering N 2 pressures. β -Si 3 N 4 particles with high aspect ratios were synthesized when the content of CaO was less than 5%. Increasing content of additive could reduce the diameter of β -Si 3 N 4 granules. More significantly, the underlying growth mechanism of the β -Si 3 N 4 was tentatively put forward.

中文翻译：

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具有定制形态的微米级β-Si 3 N 4 的碳热合成

摘要 通过碳热还原氮化（CRN）策略成功合成了具有定制形貌的微米级β-Si 3 N 4 粉末。用10 mol%的CaO添加剂制备了具有低纵横比的β-Si 3 N 4 颗粒，颗粒的大小可以通过改变N 2 压力来调节。当CaO含量小于5%时，合成了具有高纵横比的β-Si 3 N 4 颗粒。增加添加剂的含量可以减小β-Si 3 N 4 颗粒的粒径。更重要的是，初步提出了β-Si 3 N 4 的潜在生长机制。