Phase Transition and Large Electrostrain in Lead-Free Li-Doped (Ba, Ca)(Ti, Zr) O3 Ceramics
Phase Transition and Large Electrostrain in Lead-Free Li-Doped (Ba, Ca)(Ti, Zr) O3 Ceramics
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DOI：
10.1111/jace.14184
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发表时间：
2016-06-01
影响因子：
3.9
通讯作者：
Li, Guorong
中科院分区：
文献类型：
--
作者：
Chen, Xiaoming;Li, Yongsheng;Li, Guorong
Li掺杂Ba0.85Ca0.15Ti0.90Zr0.10O3（BCTZ）陶瓷通过调节相界实现了大的压电效应。通过改变Li含量，在陶瓷中形成了R-O和O-T共存的多相结构。在较低的烧结温度（1350 ℃/2 h）下，Li掺杂的（Ba，Ca）（Ti，Zr）O3陶瓷具有较高的压电常数d（33）（493 pC/N）和较大的电应变（dS（max）/dE（max）= 931 pm/V）。材料性能的显著提高归因于Li掺杂效应引起的室温附近的多相区。
Large piezoelectric effect is achieved in Li-doped Ba0.85Ca0.15Ti0.90Zr0.10O3( 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 d(33) ( 493 pC/N) and large electrostrain ( dS(max)/dE(max) = 931 pm/V) have been observed in the Li-doped ( Ba, Ca)(Ti, Zr)O-3 ceramics at low sintering temperature ( 1350 degrees C/2 h). The significant enhancement in materials properties is ascribed to the multiphase region around room temperature induced by Li-doped effect.