Liu Zhenglong, Chai Zhinan, Yu Chao, Ding Jun, Deng Chengji, Li Xiangcheng, Zhu Hongxi
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China.
Guangzhou Newlife New Material Co., Ltd., Guangzhou 511356, China.
Materials (Basel). 2022 Sep 1;15(17):6074. doi: 10.3390/ma15176074.
SiN powders were synthesized with Fe, Co, or Ni as catalysts using Si powder at 1250 °C in a nitrogen atmosphere by liquid-phase-assisted catalytic nitridation synthesis (LPA-CNS). The catalytic effects of the metals on the nitridation of silicon powder were investigated by mixing the powder with 2 wt% by mass of Fe, Co, or Ni in a high-temperature liquid phase in flowing nitrogen. The α-SiN micro-morphology could be effectively changed by adjusting the type of catalyst in the initial reaction mixtures. Fe, Co, and Ni promoted the formation of α-SiN at 1250 °C and controlled the morphology of the α-SiN particles. The hexagonal flakes of α-SiN with a better defined morphology were obtained using Ni as the catalyst, compared to that obtained from the other two catalysts.
通过液相辅助催化氮化合成（LPA-CNS），以铁、钴或镍为催化剂，在氮气气氛中于1250℃使用硅粉合成了氮化硅粉末。通过在流动氮气中的高温液相中将硅粉与2质量%的铁、钴或镍混合，研究了这些金属对硅粉氮化的催化作用。通过调整初始反应混合物中催化剂的类型，可以有效地改变α-氮化硅的微观形态。铁、钴和镍在1250℃促进了α-氮化硅的形成，并控制了α-氮化硅颗粒的形态。与使用其他两种催化剂得到的α-氮化硅相比，使用镍作为催化剂获得了形态更清晰的六边形片状α-氮化硅。
