γ-AlON透明陶瓷具有优良的光学和力学性能, 可望代替蓝宝石单晶用做红外窗口和透明装甲. 采用反应烧结法制备AlON透明陶瓷, 探索了烧结助剂以及保温时间对AlON陶瓷致密化的影响. 通过X射线衍射和扫描电镜分析了陶瓷烧结体的物相及显微结构, 利用分光光度计测试了透明陶瓷的直线透过率. 结果表明: 和单掺的MgO或Y2O3相比, 以MgO和Y2O3共掺作为烧结助剂能够更好地促进AlON的致密化. 在保持Y2O3添加量为0.08wt%的情况下, 样品的透过率随着MgO添加量的增加而明显提高. 添加0.08 wt% Y2O3 +1wt% MgO作为烧结助剂的样品在1950℃保温12h后透过率(600nm处)达到约60%.
Transparent AlON ceramic which exhibit excellent optical and mechanical properties is a potential alternative to sapphire for the application of IR windows and armor. In this work, transparent AlON ceramics were successfully prepared by solid-state reaction sintering. The effects of sintering aids and holding time on densification of AlON ceramics were investigated. The phase composition and microstructure of the ceramics were characterized by XRD and SEM, respectively. In-line transmittance of the ceramics was measured by spectrophotometer. The results show that co-doping of MgO and Y2O3 as sintering aid is more effective to enhance densification of AlON ceramics than the doping of MgO or Y2O3. With doping level of 0.08wt%Y2O3, the transmission of ceramics increases with the increase of MgO content. Co-doped with 0.08 wt% Y2O3 and 1wt% MgO, the ceramics (1mm thick) sintered at 1950℃ for 12h in N2 atmosphere have an in-line transmission of 60% (at 600nm).
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