Photostrictive Characteristics of Fine-Grained PLZT Ceramics Derived from Mechanically Alloyed Powder
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概要
- 論文の詳細を見る
Lanthanum-modified lead zirconate titanate (PLZT) ceramics possess photostrictive effect that is applicable to photo-driven and wireless actuators. The photo-induced strain is expressed in a product of piezoelectric constant and anomalous photovoltage, and it is theoretically explained that grain size reduction enhances photovoltage. Finegrained PLZT ceramics that have mean grain sizes of 2.0-0.2μm were prepared through the mechanical alloying (MA) synthesis and normal or hot-press sintering process. Their piezoelectric constant, dielectric constant and electric resistivity up to a grain size of 0.5μm were not dependent on grain size and agreed with the conventional one. The photovoltage significantly increased with a decrease in grain size. These results suggested that a lowering of grain size by MA leads to a remarkable improvement of the photo-induced strain value without a decline in strain response. However, the photo-induced strain value within grain size less than 0.5μm extremely declined due to a little remnant polarization. The photo-induced strain with illumination of 15mWcm<SUP>-2</SUP> intense was maximally estimated to be 1×10<SUP>-4</SUP>.
- 社団法人 粉体粉末冶金協会の論文
- 2003-11-15
著者
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李 敬鋒
東北大学工学研究科材料加工プロセス学専攻
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Li Jing-feng
Department Of Materials Processing Graduate School Of Engineering Tohoku University
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Li Jing-feng
State Key Laboratory Of New Ceramics And Fine Processing Department Of Materials Science And Enginee
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Li Jing-feng
Statekey Laboratory Of New Ceramics And Fine Processing Department Of Materials Science And Engineer
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WATANABE Ryuzo
Department of Materials Processing, Grakuate School of Engineering tohoku University
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Watanabe Ryuzo
Department Of Materials Processing School Of Engineering Tohoku University
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Watanabe Ryuzo
Department Of Material Processing Graduate School Of Engineering Tohoku University
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KIKUCHI Shoko
Graduate School of Engineering, Tohoku University
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TAKAGI Kenta
Graduate School of Engineering, Tohoku University
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Takagi Kenta
Graduate School Of Engineering Tohoku University
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Kikuchi Shoko
Graduate School Of Engineering Tohoku University
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