Dielectric Properties of Pb(Zr, Ti)O3-Dispersed MgO Nanocomposite
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概要
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Ceramic nanocomposites with perovskite-type ferroelectric dispersoids have been studied in order to introduce ferroelectricity and piezoelectricity into structural ceramics. First, MgO matrix/BaTiO3 dispersed ceramic nanocomposites were fabricated, but the piezoelectric coupling factor, kp, of the nanocomposites was reduced to less than 5%. In the present work, MgO matrix/Pb(Zr,Ti)O3 (PZT) dispersed ceramic nanocomposites were studied to realize ceramic nanocomposites with larger kp values than MgO/BaTiO3. MgO/PZT ceramic nanocomposites were successfully fabricated by a pressure-less sintering method. The MgO/PZT nanocomposites exhibited a D–E hysteresis loop, and the ferroelectricity of the PZT dispersoid was confirmed. The tetragonality of the PZT dispersoid was decreased in comparison to that of monolithic PZT ceramics, however, the tetragonal-cubic phase transformation temperature of the PZT dispersoid was higher than that of the monolithic PZT. The decrease in the tetragonality was correlated to the incorporation of Mg ions into the PZT dispersoid. The MgO/PZT nanocomposites exhibited piezoelectricity after poling, and the kp value was about twice that of the MgO/BaTiO3 nanocomposites.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
- 1998-06-15
著者
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Hwang Hae
National Industrial Research Institute Of Nagoya
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SANDO MUTSUO
National Industrial Research Institute
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Niihara Koichi
The Institute Of Scientific And Industrial Research Osaka University
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YASUOKA Masaki
National Industrial Research Institute of Nagoya
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NAGAI Toru
Synergy Ceramics Laboratory, Fine Ceramics Research Association
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Hwang Hae
National Industrial Research Institute of Nagoya, 1 Hirate-cho, Kita-ku, Nagoya 462, Japan
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Nagai Toru
Synergy Ceramics Laboratory, Fine Ceramics Research Association, 1 Hirate-cho, Kita-ku, Nagoya 462, Japan
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Niihara Koichi
The Institute of Science and Industrial Research, Osaka University
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Yasuoka Masaki
National Industrial Research Institute of Nagoya, 1 Hirate-cho, Kita-ku, Nagoya 462, Japan
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