Reactive sintered highly transparent AlON ceramics with Y <sub>2</sub> O <sub>3</sub> ‐MgAl <sub>2</sub> O <sub>4</sub> ‐H <sub>3</sub> BO <sub>3</sub> ternary additive
Shuixian Yang, Jianmin Li, Hao Guo, Xiaojian Mao, Run Tian, Jian Zhang, Shiwei Wang
Abstract
Abstract In this study, highly transparent aluminate oxynitride (AlON) ceramics were prepared via the reactive sintering of Al 2 O 3 and AlN powders using a Y 2 O 3 ‐MgAl 2 O 4 ‐H 3 BO 3 ternary sintering additive. The ternary doping process resulted in the efficient preparation of transparent AlON ceramics with small grains and high transmittance as compared to the binary doping (Y 2 O 3 ‐MgAl 2 O 4 ) process. The addition of 0.1 wt.% Y 2 O 3 ‐0.4 wt.% MgAl 2 O 4 ‐0.12 wt.% H 3 BO 3 resulted in the formation of a 4‐mm‐thick AlON ceramic with high transmittance (81% at 600 nm) and low haze (3.46%). This is the best performance in terms of the thickness and transmittance reported for AlON transparent ceramics prepared by the reactive sintering method.