烧结助剂(Y3+、La3+和Mg2+)对半透明氧化铝陶瓷的透光率的影

通过化学沉淀法引入烧结助剂Y³⁺、La³⁺和Mg²⁺, 采用真空烧结工艺制备了半透明Al₂O₃陶瓷, 并研究了烧结助剂对烧结材料的微观结构、相对密度和透光率的影响。结果表明: 引入的烧结助剂能均匀分散在合成的半透明Al₂O₃陶瓷中。烧结助剂的最佳引入量为Mg²⁺(0.15wt%)、Y³⁺(0.05wt%)和La³⁺(0.05wt%), 对应的试样在350~800 nm的波长范围内显示出的最高的总透光率(TFT)高于80%。此外, Y³⁺的掺杂可以促进晶粒生长, 降低孔隙率, 从而提高半透明Al₂O₃陶瓷的透光率。

Effects of Sintering Aids (Y3+, La3+ and Mg2+) on the Optical Transmittance of Translucent Alumina Ceramic

Translucent Al₂O₃ ceramics were prepared by vacuum sintering using Y³⁺, La³⁺ and Mg²⁺ as sintering aids which were introduced via chemical precipitation. Effects of the sintering aids on microstructure, relative density and optical transmittance of the translucent Al₂O₃ ceramics were investigated. The results show that the sintering aids are homogeneously dispersed in translucent Al₂O₃ ceramics. The optimal amount of the sintering aid introduced is Mg²⁺ (0.15wt%), Y³⁺ (0.05wt%) and La³⁺ (0.05wt%), and the corresponding sample shows the highest total forward transmittance (above 80% in the wavelength range of 350-800 nm). Moreover, the addition of Y³⁺ could promote grain growth and decrease porosity, thus the optical transmittance of the translucent Al₂O₃ ceramics is enhanced.