中子和γ辐照对Mn掺杂0.9Pb（Mg1/3Nb2/3）O3–0.1PbTiO3陶瓷电热性能的影响

IF 7 3区材料科学 Q1 ENERGY & FUELS

Journal of Physics-Energy Pub Date : 2023-09-02 DOI:10.1088/2515-7655/acf61b

Ankita Sarkar, Matej Šadl, Anze Jazbec, Luka Snoj, S. Drnovsek, T. Rojac, Geoff L Brennecka, H. Uršič, B. Malič

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引用次数: 1

摘要

研究了中子和γ辐照对Mn掺杂0.9Pb（Mg1/3Nb2/3）O3–0.1PbTiO3（PMN–10PT）陶瓷的低场和高场介电和电热（EC）性能的影响。在暴露于高达1017 cm−2的中子通量和高达1200 kGy的伽马射线剂量时，Mn掺杂的PMN–10PT表现出较低的饱和极化、增加的内部偏置场和降低的EC温度变化。相比之下，未掺杂PMN–10PT的各自特性在暴露于中子和伽马射线时几乎保持不变。在Mn掺杂的PMN–10PT中，通过掺杂引入的受体-氧空位缺陷复合物有助于降低材料在性能没有明显变化的情况下存活的阈值辐射剂量。Mn掺杂的PMN–10PT的EC响应的辐射诱导降解可以通过在450°C下退火来部分修复。该研究为设计用于高电离辐射环境（如医疗领域或空间技术）中固态冷却应用的EC陶瓷材料提供了指导。

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Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 ceramics

The influence of neutron and gamma irradiation on the low- and high-field dielectric and electrocaloric (EC) properties of Mn-doped 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 (PMN–10PT) ceramic is studied. Upon exposure to neutron fluences of up to 1017 cm−2 and gamma-ray doses of up to 1200 kGy the Mn-doped PMN–10PT exhibits a lower saturated polarization, increased internal bias field and reduced EC temperature change. In comparison, the respective properties of the undoped PMN–10PT remain almost unchanged upon exposure to neutrons and gamma rays. In Mn-doped PMN–10PT, the acceptor-oxygen vacancy defect complexes, introduced via doping, contribute to the lowering of the threshold radiation dose that the material survives without noticeable changes in properties. Radiation-induced degradation of the EC response of Mn-doped PMN–10PT can be partially healed by annealing at 450 °C. The study provides guidance for designing EC ceramic materials for solid-state cooling applications in environments of high ionizing radiation, such as the medical field or space technologies.

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来源期刊

Journal of Physics-Energy Multiple-

CiteScore

10.90

自引率

1.40%

发文量

期刊介绍： The Journal of Physics-Energy is an interdisciplinary and fully open-access publication dedicated to setting the agenda for the identification and dissemination of the most exciting and significant advancements in all realms of energy-related research. Committed to the principles of open science, JPhys Energy is designed to maximize the exchange of knowledge between both established and emerging communities, thereby fostering a collaborative and inclusive environment for the advancement of energy research.