富含锆酸铅的钛酸铅中的近室温大负电致发光效应与巨大的热转换率

IF 3.5 2区 物理与天体物理 Q2 PHYSICS, APPLIED
Jian Guo, Haoran Yu, Mingqian Yuan, Xue-Jun Yan, Shan-Tao Zhang
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引用次数: 0

摘要

具有电致发光效应(ECE)和/或热转换率λ的材料是开发各种热管理器件的理想材料,但开发高性能的候选材料,特别是同时具有较大的近室温 ECE 和 λ 的材料实际上并不存在。富含 Zr 的 PbZr1-xTixO3 (PZT) 显示了成分诱导的反铁电-铁电(AFE-FE)相界,在此相界中预计会出现不寻常的负 ECE。同时,AFE-FE 相变过程中的电场敏感偶极取向可用于调节 λ。在这项工作中,开发了 AFE 相和 FE 相共存的富 Zr PZT,并通过改变 Ti 含量将 AFE-FE 相变温度调至室温,以实现较大的负 ECE 和 λ。在最佳的 PbZr0.95Ti0.05O3 陶瓷中,60 °C附近的绝热温度变化ΔT 为-3.3 K,同时伴有 1.84 的巨大λ,这表明该陶瓷在固态制冷领域具有广阔的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Near room-temperature large negative electrocaloric effect accompanied by giant thermal switching ratio in Zr-rich lead zirconate titanate
Materials with electrocaloric effect (ECE) and/or thermal switching ratio λ are desirable for developing various heat management devices, but developing high-performance candidates, especially those that simultaneously possess large near room-temperature ECE and λ is actually absent. The Zr-rich PbZr1−xTixO3 (PZT) displays a composition-induced antiferroelectric-ferroelectric (AFE-FE) phase boundary, where an unusual negative ECE is expected. Meanwhile, the electric field-sensitive dipole orientation during the AFE-FE phase transition can be employed to modulate λ. In this work, the Zr-rich PZT with coexisting AFE and FE phases was developed and the AFE-FE phase transition temperature is tuned toward room temperature by changing the Ti content to achieve large negative ECE and λ. A large adiabatic temperature change ΔT of −3.3 K accompanied by a giant λ of 1.84 near 60 °C is captured in optimal PbZr0.95Ti0.05O3 ceramics, demonstrating a prominent application prospect in solid-state refrigeration.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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