材料科学
居里温度
铁电性
陶瓷
电介质
兴奋剂
分析化学(期刊)
压电
相(物质)
矿物学
复合材料
凝聚态物理
光电子学
化学
铁磁性
物理
有机化学
色谱法
作者
Wei Li,Xiang He,Ying Liu,O. I. V’yunov,Dongfang Pang
出处
期刊:ACS applied electronic materials
[American Chemical Society]
日期:2023-11-21
卷期号:5 (12): 6974-6984
标识
DOI:10.1021/acsaelm.3c01361
摘要
A Ce4+-substituted 0.67BiFeO3–0.33BaTiO3 lead-free ceramic system was systematically investigated. The results indicate that all samples exhibit the coexistence of rhombohedral phase and pseudocubic phase. Dielectric measurements indicate that with the doping of Ce4+, the ferroelectric phase gradually transferred to the relaxor phase. The addition of an appropriate number of Ce4+ ions led to a larger grain size of the BiFeO3–BaTiO3 (BF–BT) ceramics, a lower Fe2+ content, and higher resistivity. At a Ce4+ concentration (x) of 0.3 mol %, the BF–BT–xCe ceramic exhibited excellent dynamic piezoelectric coefficients (d33* = 406 pm/V) and a high Curie temperature of 418.2 °C. Furthermore, the d33* (406 pm/V) at room temperature of BF–BT–0.003Ce significantly increased to 759 pm/V at 125 °C. The enhanced field-induced strain performance of the ceramics is attributable to lattice distortion induced by Ce4+ doping. The temperature-dependent behavior of the field-induced strain in the BF–BT–Ce ceramics was enhanced by thermally induced domain switching. This study confirms the potential of the investigated BF–BT–Ce ceramics as promising lead-free, environmentally friendly, and high-temperature piezoelectric material.
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