Several rare earth elements (Sc, La, Pr, Sm, Gd, Dy, Er, and Yb) were evaluated to develop a sintering additive for transparent γ-AlON. After adding 0.2 wt. % of each of the rare earth additives to the α-Al₂O₃ and AlN starting material, hot pressing was performed at 1850 °C for 1 h under 20 MPa as a screening test, whereby the γ-AlON with Pr-nitrate showed the highest transmittance of 60.4 % at 632 nm. Two-step pressureless sintering was conducted as a separate test for the same starting material after adjusting the amount of Pr-nitrate to 0, 0.1, or 0.2 wt. % to enhance transmittance. The γ-AlON with 0.1 wt. % Pr-nitrate showed the highest transmittance of 80.36 % after 1st and 2nd sintering steps at 1610 and 1940 °C, respectively, indicating that Pr can be an alternative sintering additive to conventional Y₂O₃, MgO, and La₂O₃ for the fabrication of transparent γ-AlON.

对几种稀土元素（Sc，La，Pr，Sm，Gd，Dy，Er和Yb）进行了评估，以开发用于透明γ-AlON的烧结添加剂。加入0.2重量％后。每个稀土添加剂加入的％的α-Al ₂ ö ₃对于AlN原料，在20MPa，1850℃，1h的条件下进行热压，作为屏蔽试验，γ-AlON与Pr-硝酸盐在632nm下显示出最高的透过率60.4％。在将硝酸硝酸Pr的含量调整为0、0.1或0.2 wt。％的条件下，对同一原材料进行两步无压烧结作为单独的测试。％以提高透射率。具有0.1重量％的γ-AlON。硝酸硝酸铵％分别在1610和1940°C的第一和第二烧结步骤后显示出最高的透光率80.36％，这表明Pr可以替代传统的Y ₂ O ₃，MgO和La ₂ O ₃作为烧结添加剂。透明γ-AlON的制备。