中文摘要：

不同 SiAlON 阶段(-SiAlON,X 阶段 SiAlON 和 12H 粉末) 的氧化行为在空气空气从煤脉石综合了用等温的 thermogravimetry (TG ) 和地排放扫描电子显微镜学(FE-SEM ) 被调查。在煤脉石的铁的氧化物杂质的效果被学习。结果证明铁的氧化物贡献在合成过程期间水晶的 SiAlON 的生长。在氧化实验，铁的氧化物的存在减少 SiAlON 的氧化抵抗。原因是杂质在更高的温度引起一个液体阶段的形成。在 14231623 K， SiAlON 粉末的氧化是控制的散开，它能被 Chous 模型描述。一个公平协议在理论计算和试验性的数据之间被发现。

英文摘要：

The oxidation behavior of different SiAlON phases（β-SiAlON,X-phase SiAlON and 12H powders） synthesized from coal gangue in air atmosphere was investigated using isothermal thermogravimetry（TG） and field-emission scanning electron microscopy（FE-SEM）.The effect of ferric oxide impurities in coal gangue was studied.The results show that ferric oxide contributes to the growth of SiAlON crystalline during the synthesis process.In the oxidation experiment,the existence of ferric oxide decreases the oxidation resistance of SiAlON.The reason is that the impurity causes the formation of a liquid phase at a higher temperature.At 1423-1623 K,the oxidation of SiAlON powders is diffusion controlled and it can be described by Chou＇s model.A fair agreement is found between theoretical calculations and the experimental data.