Microstructure and electrical properties of (1-x) K0.5Na0.5NbO3-xBi0.5N a0.5Zr0.85Sn0.15O3 lead-free ceramics

作者：Gou, Qian; Zhu, Jianguo^*; Wu, Jiagang; Li, Fenglian; Jiang, Laiming; Xiao, Dingquan

来源：Journal of Alloys and Compounds, 2018, 730: 311-317.

DOI：10.1016/j.jallcom.2017.09.331

• Lead-free piezoelectric ceramic
• KNN
• Piezoelectric properties
• Phase boundary

In this work, we simultaneously obtained a large d(33) and high T-C in a lead-free piezoelectric system of (1-x) K0.5Na0.5NbO3-xBi(0.5)Na(0.5)Zr(0.85)Sn(0.15)O(3) [(1-x)KNN-xBNZS]. This lead-free piezoelectric system was synthesized by conventional solid-state method. We investigated the microstructure and electrical properties of this system. The rhombohedral-tetragonal (R-T) phase coexistence is demonstrated in the ceramics with 0.05 <= x <= 0.06. Owing to the R-T phase coexistence as well as the enhancement of ferroelectric and dielectric properties, the ceramics with x = 0.05 showed a large d(33) of similar to 350 pC/N together with a high T-C of similar to 315 degrees C, thereby illustrating that it is an effective way to obtain both large d(33) and high T-C in KNN-based ceramics. It is believed that such a ceramic system with large d(33) and high T-C is one of the promising candidates for piezoelectric devices.

• 出版日期2018-1-5
• 单位四川大学