Ferroelectric and pyroelectric properties of Ce³⁺ modified tetragonal tungsten bronze structured lead barium niobate-55 ceramics

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• 作者：Koduri Ramam^a ; ^{ramamk@udec.cl} ; K. Chandramouli^b
• 关键词：A. Ceramics ; A. Electronic materials ; D. Ferroelectricity
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：2012
• 期刊代码：69_00223697
• 类别：ch
• 出版时间：September, 2012
• 卷：73
• 期：9
• 页码：1061-1065
• 文件大小：688 K

摘要

In this work, Lead Barium Niobate-55 tetragonal tungsten bronze structured ceramics modified with Ce³⁺ with the stoichiometric formula Pb_{0.55鈭?3y/2)}Ce_yBa_0.45Nb₂O₆, where y=0-10 mol%Ce³⁺, were fabricated through the solid state reaction method and investigated for ferroelectric and pyroelectric properties. Pb_{0.55鈭?3y/2)}Ce_yBa_0.45Nb₂O₆ (PBN55) exhibited tetragonal (4mm) tungsten bronze structure. The ferroelectric properties (spontaneous polarization, P_s, remanent polarization, P_r and coercive field, E_c), as a function of Ce³⁺ concentration, have been reported. The influence of Ce³⁺ on pyroelectric properties of the PBN55 system has been evaluated. The pyroelectric properties were characterized and discussed as a function of Ce³⁺. The 6 mol%Ce³⁺ modified tetragonal PBN55 composition exhibited optimum pyroelectric properties in the series which could be suitable for possible pyroelectric applications.