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在高温BiScO₃-PbTiO₃基陶中同时实现大压电和低介电损耗

Xiaodan Ren¹, Mingyang Tang¹, Xin Liu¹

¹Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.

ACS applied materials & interfaces

|August 22, 2023

概括

Nb5+注增强了压电特性,并抑制了BiScO-PbTiO (BS-PT) 陶中的介电损失. 这一突破为苛刻的应用提供了稳定的高温压电材料.

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:

高温压电材料对于国防,航空航天,核能和油井记录至关重要.
现有的材料往往为了压电性能而牺牲温度稳定性 (库里温度,介电损失),限制在恶劣环境中使用.

研究的目的:

调查Nb5+供体和Mn2+/3+接受体对BiScO-PbTiO (BS-PT) 陶的影响.
增强压电特性和提高温度稳定性,特别是降低高温下的介电损失.

主要方法:

兴奋剂BiScO₃-PbTiO₃ (BS-PT) 陶与Nb⁵⁺ (捐赠者) 和Mn^2+/3+ (接受者).
在一系列温度范围内对电介质和压电特性进行表征.
在现场测量以评估材料在高温下的稳定性.

主要成果:

Nb⁵⁺ 供体兴奋剂增强了压电特性,并通过降低氧空位度,显著抑制了高温介电损失.
实现了卓越的压电性能 (d₃₃ = 553 pC/N在RT,1528 pC/N在400 °C) 和低介电损耗 (<2%从150-300 °C).
保持了高基里温度 (T_C ~ 445 °C),并表现出高达 ~ 400 °C 的显著温度稳定性.

结论:

与Mn2+/3+相比,Nb5+兴奋剂是一种优越的策略,用于提高BS-PT陶的高温压电性能.
开发的Nb5+化BS-PT陶在高温压电应用方面取得了重大进展.
这项研究为开发具有增强高温能力的先进压电材料提供了宝贵的指导方针.

关键词:

它们是BiScO3−PbTiO3 介电损失介电损失介电损失兴奋剂的使用兴奋剂的使用这是一种压电式电体.温度稳定的温度稳定性

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