以粉煤灰空心微珠、金属硅粉为原料,采用氮化反应工艺合成了O'-sialon粉体.研究了原料配比、氮化温度等对合成O'-sialon粉体的影响.结果表明,在1350～1500℃可以氮化反应合成O'-sialon,其最佳的合成温度为1450℃,合成产物中O'-sialon的纯度较高;硅粉的用量对O'-sialon的合成影响不明显.O'-sialon粉体的显微结构观察结果表明:1350～1450℃氮化合成的O'-sialon粉体都已经失去了粉煤灰空心微珠的原始形貌,相互粘连在一起,反应产物中仅存在少量O'-sialon空心球,其粒径约为100μm.
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