Abstract The influence of the dispersity and morphology of ceramic powders on the characteristics of green bodies and the optical transmittance of YAG:Yb (20 at%) ceramics was considered. The effect of the specific surface area on the relative density of compacts was studied. An increase in the specific surface area from 1.45 to 12.38 m2/g led to a decrease in the relative density of green body compacts from 52% to 38% under the fixed uniaxial pressure of 50 MPa. An increase in the uniaxial pressing value up to 150 MPa provided a maximum increase of the optical transmission of ceramics. However, an increase in the specific surface area and uniaxial pressure led to the appearance of macrodefects in ceramic samples. Cold isostatic pressing at 200 MPa after uniaxial pressing at 50 MPa resulted in an increase of optical transparency and the elimination of the macrodefect formation in ceramics. Dispersity and morphology of ceramic powders have a significant effect on the optical transparency of ceramics. Forming conditions had insignificant influence on optical characteristics. Highly transparent YAG:Yb ceramics with 80% transmittance were developed.

中文翻译：

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陶瓷粉体形貌和成型条件对YAG:Yb陶瓷透光率的影响

摘要 考虑了陶瓷粉末的分散性和形貌对YAG:Yb (20 at%)陶瓷生坯特性和透光率的影响。研究了比表面积对压块相对密度的影响。在 50 MPa 的固定单轴压力下，比表面积从 1.45 增加到 12.38 m2/g 导致生坯压坯的相对密度从 52% 减少到 38%。单轴加压值增加到 150 MPa 可最大程度地提高陶瓷的光透射率。然而，比表面积和单轴压力的增加导致陶瓷样品中出现宏观缺陷。在 50 MPa 的单轴压制后，在 200 MPa 的冷等静压导致光学透明度增加并消除了陶瓷中的宏观缺陷形成。陶瓷粉体的分散性和形貌对陶瓷的光学透明度有显着影响。成型条件对光学特性影响不大。开发了具有 80% 透光率的高透明 YAG:Yb 陶瓷。