Piezoelectric behavior of (1?x)K_0.50Na_0.50NbO₃?xBa_0.80Ca_0.20ZrO₃ lead-free ceramics

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• 作者：Tao Chen^a ; ^{chentaocmc@163.com} ; ^{myfriendsroom@163.com} ; Hongli Wang^b ; Ting Zhang^a ; Guangchang Wang^a ; Jifang Zhou^a ; Jianwei Zhang^a ; Yuhong Liu^a
• 关键词：C. Piezoelectric properties ; (K ; Na)NbO3 ; Lead-free ceramics
• 刊名：Ceramics International
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：39
• 期：6
• 页码：6619-6622
• 全文大小：730 K

文摘

(1?x)K_0.50Na_0.50NbO₃-xBa_0.80Ca_0.20ZrO₃ [(1?x)KNN-xBCZ] lead-free ceramics were prepared by the conventional solid-state method, and the effect of BCZ content on their phase structure and piezoelectric properties was studied. A coexistence of rhombohedral-orthorhombic phases was identified in the range 0.04<x<0.08. With increasing the BCZ content, their grain size becomes smaller, and their Curie temperature gradually decreases. An optimum piezoelectric behavior of d₃₃¡«197 pC/N and k_p¡«40.6 % was demonstrated in the ceramic with x=0.06 because of the coexistence of two phases. As a result, the introduction of BCZ could further improve piezoelectric properties of KNN ceramics.