材料科学
等轴晶
透明陶瓷
陶瓷
烧结
透射率
纵横比(航空)
泥浆
复合材料
粒度
微观结构
冶金
光电子学
作者
Han Y. H. Chen,Jin Zhao,Shunzo Shimai,Xiaojian Mao,Jian Zhang,Guohong Zhou,Shiwei Wang,Na Gu,Kai Zheng
标识
DOI:10.1007/s40145-021-0558-y
摘要
Abstract Transparent Al 2 O 3 ceramics with grains aligned to the c -axis were prepared by adding platelets with a low aspect ratio into fine equiaxed particles. The mixed powders were formed into green bodies using spontaneous coagulation casting and sintered by pressureless sintering and hot-isostatic pressure sintering. Zeta potentials and rheological behavior of the slurries, relative densities of green bodies, and orientation and optical properties of sintered bodies were investigated and discussed. The platelet with a high aspect ratio suppressed densification more seriously during sintering than the one with a low aspect ratio. An excellent oriented structure was obtained when 5 wt% platelets with a low aspect ratio were added, and transparent Al 2 O 3 ceramics with grains aligned to c -axis were successfully prepared; the in-line transmittance was 78.4% at 600 nm, which is the highest one in the currently reported literature.
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