Dielectric Properties of Pb(Fe_<1/2>Nb_<1/2>)O_3-Based Ceramics (<Special Issue> FERROELECTRIC MATERIALS AND THEIR APPLICATIONS)
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概要
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A broad peak above the Curie temperature of lead iron niobate Pb(Fe_<1/2>Nb_<1/2>)O_3 may be related to interfaces at the grain boundary. The origin of the anomalous second peak is not clear. The Sr-substituted lead iron niobate Pb_<1-x>Sr_x(Fe_<1/2>Nb_<1/2>)O_3 ceramics were prepared for the purpose of investigating this anomaly. The dielectric anomaly and pyroelectric current in this system at around 200℃ may be explained by the space-charge polarization in the interfaces of the grain boundary due to ionic valence changes from Fe^<3+> to Fe^<2+> in the B-site of the perovskite structure.
- 社団法人応用物理学会の論文
- 1994-09-30
著者
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Ichinose Noboru
Department Of Materials Science And Engineering School Of Science And Engineering Waseda University
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Kato Nobuyuki
Department Of Materials Science And Engineering School Of Science And Engineering Waseda University
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Kato Nobuyuki
Department of Applied Chemistry, Faculty of Engineering, Osaka University
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