Abnormal change in dielectric constant of BaTiO3 -based ceramics caused by light irradiation: Key role of temperature

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-05-27 DOI:10.1016/j.jeurceramsoc.2025.117565

Peng-yu Wang , Xiao-ming Chen , Han-li Lian , Neng Qin , Tian-feng Xu , Xu-mei Zhao , Peng Liu

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引用次数: 0

Abstract

Change in dielectric constant of dielectric materials caused by light irradiation is called as photo-dielectric effect (PDE), which is very important to develop innovative electronic devices with photo-dielectric functionalities. The light irradiation always causes increase in dielectric constant, as reported widely in various materials including (Bi_0.5Na_0.5)_0.94Ba_0.06TiO₃ (BNBT). However, in this work, light illumination -induced obvious decrease in dielectric constant of the dense Mn^3 +-doped BaTiO₃ -based ceramics (BTM) was observed at room temperature, which shows opposite phenomenon compared to BNBT. By exploring effect of temperature on PDE, it is found that the thermal effect plays key role in affecting PDE behavior. The corresponding mechanism for the discrepancy of PDE between BTM and BNBT was discussed. The study helps to further explore complex factors affecting abnormal behavior of PDE.

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光照射引起的BaTiO3基陶瓷介电常数异常变化：温度的关键作用

光照射引起的介电材料介电常数变化被称为光介电效应（PDE），它对开发具有光介电功能的新型电子器件具有重要意义。光照射总是引起介电常数的增加，这在（Bi0.5Na0.5）0.94Ba0.06TiO3 （BNBT）等各种材料中得到了广泛的报道。然而，在本研究中，在室温下观察到光照导致致密的Mn3 +掺杂BaTiO3基陶瓷（BTM）的介电常数明显下降，这与BNBT相反。通过研究温度对PDE的影响，发现热效应是影响PDE行为的关键因素。探讨了BTM与BNBT之间PDE差异的机理。本研究有助于进一步探索影响PDE异常行为的复杂因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.