采用固相反应法合成γ-AlON粉体,并利用无压烧结制备γ-AlON透明陶瓷.重点研究了MgO、Y2O3添加剂的引入对固相反应合成γ-AlON粉体的合成温度、物相组成的影响及其规律,并尝试性地探讨其反应机理.结果表明,MgO的加入可以起到降低反应温度的作用,使AlON的合成温度降低至1500℃,且合成产物物相纯度较高;而Y2O3的添加会促进氮化,使原料中的Al2O3被显著氮化.在此基础之上,以添加MgO的γ-AlON合成粉体为原料进行烧结致密化,并优化了烧结工艺.测试结果表明,在最佳烧结工艺下制备的样品致密度高,在2.5～6 μm的红外波段内可透光,最高透过率可达22.12％.
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