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在BiScO₃-PbTiO₃的超低介电损耗具有优异的热稳定性,通过相位结构调节通过压电陶

Shaotong Gong¹, Tian-Long Zhao¹, Yifan Zhang²

¹Faculty of Integrated Circuit, Xidian University, Xi'an 710071, China.

ACS applied materials & interfaces

|November 22, 2025

概括

这项研究通过添加Bi(Mn2/3Nb1/3) O3 (BMN) 来增强用于电力应用的BiScO3-PbTiO3 (BS-PT) 陶. 新组合显著降低介电损耗,改善机械质量因素,同时保持出色的压电性能和热稳定性.

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

背景情况:

比斯木斯酸-酸 (BS-PT) 陶具有高压电性和库里温度.
然而,高介电损耗和低机械质量因素限制了它们在动力应用中的使用.
引入放松器铁电Bi(Mn2/3Nb1/3) O3 (BMN) 是为了克服这些局限性而被探索的.

研究的目的:

开发具有降低介电损失和增强机械质量因素的先进压电陶.
研究BMN添加对BS-PT陶性能的影响.
为了在高功率应用中实现压电特性,介电损耗和机械质量因子的同时改进.

主要方法:

在BMN-BS-PT系统中合成了富含T的形态相边界 (MPB) 组合物.
优化了组合到0.02BMN-BS-0.635PT. 的情况.
具有特征的压电特性 (d33, kp, kt),介电损耗 (tan δ),机械质量因子 (Qm) 和库里温度 (Tc).
在现场进行电气和结构特征,包括高温X射线衍射 (XRD).

主要成果:

优化的0.02BMN-BS-0.635PT组合表现出明显减少的tan δ (0.57%) 和增强的Qm (124).
保持了优良的压电特性:d33 = 365 pC/N, kp = 0.53, kt = 0.54,其中Tc = 435 °C.
该材料表现出了显著的热稳定性,kp和kt保持高达300°C的温度.
替代引发氧气空缺和缺陷二极体,抑制域壁运动和减少介电损失.
放松剂诱导的极性纳米域有助于保持高的d33值.

结论:

将BMN添加到BS-PT陶中可以有效地减少介电损失,并提高机械质量因素.
开发的BMN-BS-PT陶显示出用于高温,高功率压电应用的巨大潜力.
该研究建立了一个可行的策略,通过相位结构调节来设计先进的压电陶.

关键词:

它们是BiScO3−PbTiO3 非常好的热稳定性非常好的热稳定性在现场的技术.氧气空缺的地方是空缺的.阶段结构调节阶段结构调节超低介电损耗的介电损耗是什么

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