Structures of Pb_1−xLa_x[Zr_0.9Mg_(0.1+x)/3Nb_(0.2−x)/3]O₃ solid solutions, electrostriction and energy storage characteristics of a new antiferroelectric phase with disturbed translational symmetry

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• 作者：E.A. Bikyashev ; ^{bea@sfedu.ru" class="auth_mail" title="E-mail the corresponding author} ; I.O. Ryush ; E.A. Reshetnikova
• 关键词：Antiferroelectrics ; Field-induced phase transition ; Energy storage density ; Lead zirconate-magnesium niobate ceramics
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1429-1436
• 全文大小：1392 K

文摘

Solid solutions of lead zirconate magnesium niobate Pb_1−xLa_x[Zr_0.9Mg_(0.1+x)/3Nb_(0.2−x)/3]O₃ (0⋜x⋜0.05) doped with lanthanum ions were prepared. By the analysis of temperature-driven transitions and experiments in strong electric fields, we determined the concentration and temperature intervals of the existence of antiferroelectric and ferroelectric states. X-ray diffraction proved that the antiferroelectric phase, stable with х>0.0175 at T_C >Т >45 °C (during the cooling process at zero field), underwent a monoclinic distortion of perovskite cell and showed a disturbed translational symmetry of the orthorhombic superstructure. The energy storage density and electrostrictive strain were measured in the process that induces the antiferroelectric⇄ferroelectric phase transitions.