中文摘要：

以粉煤灰、高岭土混合物为原料，采用碳热还原氮化法制备了不同z值的β-Sialon粉体。研究了原料组成（Si／Al值）、活性炭配量以及反应温度对合成产物物相的影响。利用x射线衍射仪分析产物物相的组成，用扫描电子显微镜对产物的显微形貌进行分析。结果表明，当原料中Si／A1值为1．5，配炭量过量100％时，在1450℃保温6h条件下，可以合成主要物相为Si3Al3O3N5（β-Sislon，x=3）的粉体，粉体的显微形貌呈现纤维状；当原料中Si／Al值为1．7，配炭量过量150％时，在1450℃保温6h条件下，可以制备主要物相为Si4Al2O2N6（β-Sialon，z=2）的粉体，粉体的显微形貌呈现纤维状和板状。

英文摘要：

β-Sialon powder with different z values was synthesized using fly ash and kaolin as the starting materials by carbothermal reduction and nitridation. Phases and microstructure of the product were analyzed by X-ray diffractometer and scanning electron microscope. The results show that β-Sialon with z value of 3 （Si3Al3O3N5） was synthesized using the starting material with Si/Al ratio of 1.5 and 100% excessive carbon content at 1450 ℃ for 6 h, and the microstructure of the powder was fibrous. β-Sialon with z value of 2 （ Si4Al2O2N6 ） was obtained with Si/Al ratio of 1.7 and the 150% excessive carbon content at 1450 ℃ for 6 h, and the microstructure of this powder was fibrous and slabby.