Excellent high-temperature piezoelectric performances of ternary BiScO3-PbTiO3-(Sr0.7Bi0.2)TiO3 ceramics achieved via multiple optimization strategy
Excellent high-temperature piezoelectric performances of ternary BiScO3-PbTiO3-(Sr0.7Bi0.2)TiO3 ceramics achieved via multiple optimization strategy
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DOI：
10.1016/j.jeurceramsoc.2023.04.031
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发表时间：
2023-04
影响因子：
5.7
通讯作者：
C. Yang;Yunyun Feng;Xiaofang Zhang;Chaohui Geng;Xiaoying Guo;Shi-feng Huang;Xin Cheng;Zhenxiang Cheng;Jianli Wang
中科院分区：
文献类型：
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作者：
C. Yang;Yunyun Feng;Xiaofang Zhang;Chaohui Geng;Xiaoying Guo;Shi-feng Huang;Xin Cheng;Zhenxiang Cheng;Jianli Wang
在恶劣的环境中，对以高温压电材料为关键组分的压电器件的需求量很大。BiScO 3-PbTiO 3陶瓷具有较大的压电系数（d33）和较高的居里温度（Tc），具有较高的损耗因子（tanδ），导致严重的自热。在这里，一个多层次的方法，即，相和域结构的调节，域钉扎孤立的缺陷，和放大的激活能，提出了实现良好平衡的压电性能。在此基础上制备了新型BiScO 3-PbTiO 3-（Sr 0. 7 Bi 0. 2）TiO 3 + MnO 2（Mn：BS-PT-SBT）陶瓷。其中Mn：BS-0.62PT-0.03SBT在200 °C时具有超低的tanδ（1.62%），较大的33（358 pC N−1）和425 °C的高Tc。而且，制作的声发射传感器在25-200 °C范围内保持99 dB的高振幅，发射换能器在200 °C下具有两倍于商用P-5G的大剩余功率比该研究为设计高温下工作的压电陶瓷提供了一条有效的途径。
In harsh environments, the piezoelectric devices with critical component of high-temperature piezoelectric materials are in great demand. BiScO3-PbTiO3ceramics with large piezoelectric coefficient (d33) and high Curie temperature (Tc), shows a high-level dissipation factor (tanδ), causing serious self-heating. Here, a multiple-level approach, that is, regulation of phase and domain structures, domain pinning by isolated defects, and enlargement of the activation energy, is proposed to achieve a well-balanced piezoelectric performance. Based on this strategy, novel BiScO3-PbTiO3-(Sr0.7Bi0.2)TiO3+MnO2ceramics (Mn:BS-PT-SBT) were fabricated. Among them Mn:BS-0.62PT-0.03SBT displays an ultralow tanδ of 1.62% at 200 °C, a larged33of 358 pC N−1, and a highTcof 425 °C. Moreover, the fabricated acoustic emission sensor maintains a high amplitude of 99 dB within 25–200 °C, and the emission transducer has a large residual power ratio twice that of commercial P-5 G at 200 °C. This study provides an effective route for designing piezoelectric ceramics that operate competitively at high temperatures.