(武汉工业大学新材料研究所，武汉 430070)
摘 要: 以天然石英粉为原料，先进行活化预处理，然后在1350℃左右进行碳热还原氮化，制备了氮氧化硅粉末。实验结果表明：氮化过程中SiO2的转化率及产物中氮氧化硅(Si2N2O)的含量与SiO2的活化程度、氮化温度及添加剂等因素有关，其中氮化温度以1350℃为佳；随着SiO2活化程度的提高，其转化率也提高；添加少量的SrO，可以进一步提高SiO2转化率。 此外，还分析了Si-O-C-N系统中气体分压对Si2N2O形成的影响。
关键字: 氮氧化硅 石英 粉末 制备 碳热还原
（Advanced Materials Research Institute,Wuhan University of Technology, Wuhan 430070）
Abstract:At 1350℃ or so, Si2N2O powder had been prepared by the carbothermal reduction and nitridation of natural quartz which had been activated. The results showed that the conversion ratio of SiO2 during the reacting process and the content of Si2N2O in the product depend on various factors, such as the activated degree of natural quartz, the temperature and the additive, and 1350℃ is a suitable temperature for the synthesis of Si2N2O; the conversion ratio of SiO2 can be increased by increasing the activated degree of natural quartz, it can be further increased by the additive SrO. At the same time, the effects of p(N2), p( SiO) and p(O2) on the composition of the Si-O-C-N were discussed.
Key words: Si2N2O quartz powder preparation carbothermal reduction
