中文摘要：

以粉煤灰为主要原料，采用碳热还原氮化法合成β-Sialon粉体，再以该粉体为主要原料，添加适量Y2O3烧结助剂，利用微波无压烧结技术研究β-Sialon陶瓷的微波烧结行为。结果表明：活性炭与粉煤灰质量比值（mc／mf）为0．43，氮气流量为0．5L/min，合成温度为1450℃，保温6h条件下，获得显微形貌为粒状，z=2的β-Sialon粉体；在微波烧结温度为1500℃，保温时间为20min条件下，获得试样的密度为2．86g／cm3，相对密度为92．3％，HV0．5为1528。

英文摘要：

β-Sialon was synthesized using fly ash and activated carbon as starting materials by carbothermal reduction and nitridation. The β-Sialon powder was sintered by microwave sintering method with Y2 03- The results showed that the β-Sialon powder with z value of 2 could be synthesized with the mass ratio of activated carbon to fly ash（mc/mf） of 0.43 at 1450 ℃ for 6 h and the N2 flow of 0.5 L/ rain. The sintered sample with density of 2.86 g/cm3, relative density of 92.3% and HV0.5 of 1528 was obtained at 1500 ℃ for 20 min by microwave sintering method.