Enhanced piezoelectric coefficient of HfO₂-modified (K_0.44Na_0.56)_0.94Li_0.06(Nb_0.94Sb_0.06)O₃ lead-free ceramics

详细信息    查看全文

• 作者：Tao Chen ; Hongli Wang ; Ting Zhang ; Guangchang Wang ; Jifang Zhou ; Jianwei Zhang ; Yuhong Liu
• 关键词：C. Piezoelectric properties ; Lead-free ceramics ; (K ; Na)NbO3 ; HfO2
• 刊名：Ceramics International
• 出版年：March, 2014
• 年：2014
• 卷：40
• 期：2
• 页码：3755-3759
• 全文大小：1458 K

文摘

(K_0.44Na_0.56)_0.94Li_0.06(Nb_0.94Sb_0.06)O₃-xHfO₂ (KNLNS-xHfO₂) lead-free piezoceramics were prepared using the conventional solid-state method, and effects of HfO₂ content on their microstructure and electrical properties were investigated. Their phase structure is independent of the HfO₂ content (x=0-0.008). As the HfO₂ content increases, the grain size, the Curie temperature, and the dielectric constant decrease. The ceramic with x=0.004 has enhanced electrical properties, i.e., d₃₃~266 pC/N, k_p~42.1%, 蔚_r~950, tan未~0.027, and T_C~343 掳C, showing that adding HfO₂ enhances the piezoelectric properties of KNLNS ceramics.