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Research Article | Open Access

High transmittance and grain-orientated alumina ceramics fabricated by adding fine template particles

Han CHENa,c, Jin ZHAOb,c, Shunzo SHIMAIc, Xiaojian MAOb,c, Jian ZHANGb,c, Guohong ZHOUb,c, Shiwei WANGb,c( ), Na GUd, Kai ZHENGd
University of Chinese Academy of Sciences, Beijing 100049, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Shandong Guiyuan Advanced Ceramics Co., Ltd., Zibo 255000, China
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Abstract

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.

Keywords

templated grain growth (TGG)orientationtransparent alumina

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Journal of Advanced Ceramics
Volume 11 Issue 4,
April 2022
Pages 582-588
DOI: 10.1007/s40145-021-0558-y
Cite this article:
CHEN H, ZHAO J, SHIMAI S, et al. High transmittance and grain-orientated alumina ceramics fabricated by adding fine template particles. Journal of Advanced Ceramics, 2022, 11(4): 582-588. https://doi.org/10.1007/s40145-021-0558-y

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Received: 09 July 2021
Revised: 25 November 2021
Accepted: 26 November 2021
Published: 17 March 2022
© The Author(s) 2021.

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