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Effective grain alignment in bismuth titanate ceramic by centrifugal force

Published online by Cambridge University Press:  01 July 2006

Ping-Hua Xiang ,
Yoshiaki Kinemuchi ,
Koji Watari ,
Hirohide Ishiguro ,
Fei Cao  and
Xian-Lin Dong
Ping-Hua Xiang
Affiliation:
National Institute of Advanced Industrial Science and Technology, Nagoya 463-8560, Japan
Yoshiaki Kinemuchi*
Affiliation:
National Institute of Advanced Industrial Science and Technology, Nagoya 463-8560, Japan
Koji Watari
Affiliation:
National Institute of Advanced Industrial Science and Technology, Nagoya 463-8560, Japan
Hirohide Ishiguro
Affiliation:
Shinto V-Cerax, Ltd., Toyokawa 442-8506, Japan
Fei Cao
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
Xian-Lin Dong
Affiliation:
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
*
b)Address all correspondence to this author. e-mail: y.kinemuchi@aist.go.jp
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Abstract

Effective grain alignment in bismuth titanate ceramic was successfully realized by a novel pressure sintering technology, centrifugal sintering, in which centrifugal force is introduced by high-speed rotation of materials during the process of sintering. X-ray diffraction analyses indicated a very high orientation degree with a Lotgering factor f of ∼0.96 in centrifugal sintered samples. Scanning electron micrographs revealed that the platelike grains are well oriented with their c axes parallel to centrifugal force. The mechanism responsible for grain alignment with introduction of centrifugal force was tentatively proposed.

Keywords

FerroelectricTexture
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 7 , July 2006 , pp. 1830 - 1835
Copyright
Copyright © Materials Research Society 2006

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