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Grain orientation of Nd-modified bismuth titanate ceramics by forming at low magnetic field

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Title: Grain orientation of Nd-modified bismuth titanate ceramics by forming at low magnetic field
Authors: KOMATSU, Yuya Browse this author
UCHIKOSHI, Tetsuo Browse this author
ITOH, Hidenobu Browse this author
TAKAHASHI, Junichi Browse this author →KAKEN DB
Keywords: Bi4Ti3O12
Cation substitution with Nd3+
Magnetic-field-assisted forming
Grain orientation
Preferential grain growth
Issue Date: 2014
Publisher: The Ceramic Society of Japan
Journal Title: Journal of the Ceramic Society of Japan
Volume: 122
Issue: 1421
Start Page: 58
End Page: 62
Publisher DOI: 10.2109/jcersj2.122.58
Abstract: Grain-oriented Nd-modified bismuth titanate (BNIT) ceramics with the a-b-plane perpendicular to the direction of magnetic field (MF) were successfully fabricated by applying MF-assisted forming at lower field strengths. A BNIT powder, in which 25%of the Bi3+-site were substituted with Nd3+, was synthesized by coprecipitation in an alkaline solution and successive calcination at 600°C. Green compacts of the BNIT powder were formed by applying various MF strengths (212 T) during slip casting and then sintered at 900 and 1000°C for different times. The cation substitution with Nd3+ allowed very fine BNIT particles in a slurry to be magnetically aligned at lower field strengths. For BNIT ceramics sintered at 1000°C, the degree of grain orientation increased with increasing MF according to the parabolic relationship. Additionally, the grain orientation was enhanced by the preferential growth of anisotropic BNIT grains occurring at later stage of the sintering.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 順一

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