Phase Transition and Large Electrostrain in Lead-Free Li-Doped (Ba, Ca)(Ti, Zr)O3 Ceramics

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• 作者：Xiaoming Chen ; Yongsheng Li ; Jiangtao Zeng ; Liaoying Zheng ; Chul Hong Park and Guorong Li
• 刊名：Journal of the American Ceramic Society
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：99
• 期：6
• 页码：2170-2174
• 全文大小：955K
• ISSN：1551-2916

文摘

Large piezoelectric effect is achieved in Li-doped Ba_0.85Ca_0.15Ti_0.90Zr_0.10O₃(BCTZ) ceramics by use of tuning the phase boundaries. Rhombohedral–orthorhombic (R–O) and orthorhombic–tetragonal (O–T) multiphase coexistence is constructed in the ceramics by changing Li contents. The high piezoelectric constant d₃₃ (493 pC/N) and large electrostrain (dS_max/dE_max = 931 pm/V) have been observed in the Li-doped (Ba, Ca)(Ti, Zr)O₃ ceramics at low sintering temperature (1350°C/2 h). The significant enhancement in materials properties is ascribed to the multiphase region around room temperature induced by Li-doped effect.