Transparent Polycrystalline Alumina Ceramics with Orientated Optical Axes

A novel method is reported for the manufacture of transparent polycrystalline alumina ceramics by means of orientating the optical axes of grains parallel to each other. Such ceramics were achieved simply by exposing the slip casting process to a strong magnetic field followed by the traditional pro...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2008-10, Vol.91 (10), p.3431-3433
Main Authors: Mao, Xiaojian, Wang, Shiwei, Shimai, Shunzo, Guo, Jingkun
Format: Article
Language:English
Subjects:
Alumina
Aluminum oxide
Applied sciences
Building materials. Ceramics. Glasses
Casting
Ceramic industries
Ceramics
Chemical industry and chemicals
Diffraction
Electrotechnical and electronic ceramics
Exact sciences and technology
Grains
Magnetic fields
Materials science
Microscopy
Polycrystals
Slip casting
Technical ceramics
X-rays
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Summary:A novel method is reported for the manufacture of transparent polycrystalline alumina ceramics by means of orientating the optical axes of grains parallel to each other. Such ceramics were achieved simply by exposing the slip casting process to a strong magnetic field followed by the traditional processing for translucent alumina ceramics. X‐ray diffraction and orthogonal polarizing microscopy showed that the grains have been successfully orientated in the alumina ceramics. The in‐line optical transmission is much higher than that of the randomly orientated polycrystalline alumina because the optical axes of grains are parallel to each other.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2008.02611.x