Dielectric, ferroelectric and induced strain behavior of PLZT 9/65/35 ceramics modified by Bi₂O₃ and CuO co-doping

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• 作者：Siripong Somwan^a ; Athipong Ngamjarurojana^b ; Apichart Limpichaipanit^b ; ^{apichart_limpichaipanit@hotmail.com" class="auth_mail" title="E-mail the corresponding author} ; ^{apichart.l@cmu.ac.th" class="auth_mail" title="E-mail the corresponding author}
• 关键词：PLZT ; Dielectric properties ; Ferroelectric properties ; Strain ; Electrostriction
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：42
• 期：9
• 页码：10690-10696
• 全文大小：1453 K

文摘

PLZT 9/65/35 (Pb_0.91La_0.09(Zr_0.65Ti_0.35)_0.9775O₃) ceramics with addition of 0.25, 0.5 and 1.0 wt% of Bi₂O₃/CuO (where the ratio of Bi₂O₃:CuO=9:1 by mole) were prepared by sintering at the temperatures between 1000 and 1200 °C. It was found that Bi₂O₃/CuO could bring the sintering temperature down ~50 °C to obtain PLZT with no second phase. Dielectric and ferroelectric properties were investigated. Bi₂O₃/CuO decreased both coercive field and remnant polarization, which was caused by an increase of the degree of diffuseness in relaxor ferroelectric materials. Electric field induced strain behavior was also investigated and it was found that the addition of Bi₂O₃/CuO increased the maximum induced strain and maximized electrostrictive effect. Therefore, Bi₂O₃/CuO was useful as a sintering aid, which improved the dielectric and the relaxor ferroelectric properties as well as the electric field induced strain of PLZT ceramics.