通过多规模监管战略,在PZT压陶中实现了平衡的表现
Wei Xiao1,2, Zhengran Chen1, Xiaowei Liu3,4
1Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 588 Heshuo Road, Jiading District, Shanghai 201800, China. xw23221@163.com.
Materials horizons
|August 9, 2024
概括
本研究介绍了一种多尺度策略,旨在同时提高压电材料的压电系数 (d33) 和机械质量系数 (Qm). 这一突破为开发用于高功率应用的先进压电陶提供了途径.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 陶工程 陶工程 陶工程
背景情况:
- 高功率压电应用需要具有高机械质量因子 (Qm) 和压电系数 (d33) 的材料.
- 通常存在一种权衡,即改善d33往往会降低Qm,反之亦然.
研究的目的:
- 制定一个多尺度调节策略,在压电材料中同时增强Qm和d33.
- 为了克服Qm和d33.3之间的传统反向关系.
主要方法:
- 聚焦相位结构,铁电领域和晶格缺陷的多层次调节策略.
- 结构特征分析阶段边界,域结构和缺陷分离.
- 高温抛光处理. 高温抛光处理.
主要成果:
- 实现了一种平衡的电机性能组合:Qm = 726,d33 = 502 pC N−1, kp = 0.69,tanδ = 0.0024,和Tc = 267 °C.
- 确定了形态变异相极限和增强的分散行为,有助于降低极化旋转的能量障碍.
- 在高温抛光后观察到高度定向的域结构和小域大小.
- 证实了Ba2+分离导致A位缺陷和增加氧气空缺,保持硬化效应.
结论:
- 拟议的多规模战略有效地同时增强Qm和d33.
- 优化相位结构,域配置和缺陷工程对于高性能压电陶至关重要.
- 这项工作为设计下一代高功率压电材料提供了宝贵的见解.
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