【摘 要】
：
Transparent Al2O3 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 press
【机 构】
：
University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of High Performa
论文部分内容阅读
Transparent Al2O3 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 Al2O3 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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