无机材料学报 ›› 2022, Vol. 37 ›› Issue (6): 611-616.DOI: 10.15541/jim20210750

所属专题: 【能源环境】钙钛矿

• 研究论文 • 上一篇    下一篇

钙钛矿陶瓷薄膜的电致变色特性

黄郅航1(), 滕官宏伟2, 铁鹏3, 范德松1()   

  1. 1.南京理工大学 能源与动力工程学院, 南京 210094
    2.陆军装备部驻株洲地区航空军事代表室, 株洲 412002
    3.中国电子科技集团 第十六研究所, 合肥 230088
  • 收稿日期:2021-12-08 修回日期:2021-12-30 出版日期:2022-06-20 网络出版日期:2022-03-10
  • 通讯作者: 范德松, 副教授. E-mail: dsfan@njust.edu.cn
  • 作者简介:黄郅航(1997-), 男, 硕士研究生. E-mail: huangzhihang@njust.edu.cn
  • 基金资助:
    江苏省六大人才高峰项目(XNY-031)

Electrochromic Property of Perovskite Ceramic Films

HUANG Zhihang1(), TENG Guanhongwei2, TIE Peng3, FAN Desong1()   

  1. 1. School of Energy and Power Engineering, Nanjing University of Technology, Nanjing 210094, China
    2. Aviation Military Representative Office of the Army Equipment Department in Zhuzhou, Zhuzhou 412002, China
    3. The 16th Institute of China Electronics Technology Group Corporation, Hefei 230088, China
  • Received:2021-12-08 Revised:2021-12-30 Published:2022-06-20 Online:2022-03-10
  • Contact: FAN Desong, associate professor. E-mail: dsfan@njust.edu.cn
  • About author:HUANG Zhihang (1997–), male, Master candidate. E-mail: huangzhihang@njust.edu.cn
  • Supported by:
    The Six Talent Peaks Project in Jiangsu Province(XNY-031)

摘要:

钙钛矿锰氧化物(Perovskite manganese oxide, PMO)因受外界条件激励而发生变色的特性, 在散热领域中受到广泛关注。目前绝大多数针对PMO的变色特性的研究都是以温度激励为基础, 以电场激励实现的散热器件仍旧缺乏。由于电场激励伴随着焦耳热的影响, 目前PMO材料是否存在电致变色性能尚未得到明确证明。针对以上问题, 本研究利用电场激励对PMO内部Mn元素的影响, 提出了一种针对PMO材料的电改性方法。通过电改性大幅减弱PMO热致变色性能, 进而使La0.7Ca0.25K0.05MnO3(LCKMO)在电场激励实验中能够排除焦耳热的影响。对LCKMO电改性前后的热致变色及电致变色性能进行研究。电改性前的LCKMO发射率随温度升高而增大, 最大增量为17%。并且在受21 V电场激励后, 其发射率在173、203、243、273和373 K分别出现了15%、16%、10%、0.6%和1.4%的增量。电改性后的LCKMO热致变色性能大幅减弱, 且在受21 V电场激励后, 其发射率在273和373 K出现了10.7%和9.3%的增量。电改性前后的实验结果表明: LCKMO存在电致变色性能, 并且电场激励对LCKMO发射率的调控机制存在明显规律。此外, 针对PMO材料的电改性方法不仅能令PMO材料在排除焦耳热的影响下进行电致变色研究, 更为调控PMO材料热致变色性能提供了新的可能。

关键词: 钙钛矿, 热辐射, 电致变色, 焦耳热

Abstract:

Perovskite manganese oxide (PMO) has attracted extensive attention in the field of heat dissipation because of its discoloration stimulated by external conditions. At present, most of the researchs on the discoloration characteristics of PMO is based on temperature excitation, and there still lacks of heat dissipation equipment excited by electric field. In addition, because the electric field excitation is accompanied by Joule heat, electrochromic property of PMO materials has not been clearly proved. In view of the above challenges, here an electrical modification method for PMO materials is proposed by using influence of electric field excitation on Mn elements in PMO. Thermochromic property of PMO was greatly weakened by electrical modification, and then La0.7Ca0.25K0.05MnO3 (LCKMO) can eliminate the influence of Joule heat in electric field excitation experiment. We studied the thermochromic and electrochromic properties of LCKMO before and after electrical modification. Emittance of LCKMO before electrical modification increases with the increase of temperature with the maximum increment at 17%. After being excited by 21 V electric field, the emittance increases by 15%, 16%, 10%, 0.6% and 1.4% at 173, 203, 243, 273, and 373 K, respectively. The thermochromic property of electrically modified LCKMO is greatly weakened, and its emittance increases by 10.7% and 9.3% at 273 and 373 K, respectively, after being excited by 21 V electric field. The experimental results before and after electrical modification show that LCKMO has electrochromic property, and there is an obvious regulation mechanism of electric field excitation on the emissivity. Therefore the electrical modification method for PMO materials can not only enable the electrochromic study of PMO materials without the influence of Joule heat, but also provides a new possibility for regulation of the thermochromic property of PMO materials.

Key words: perovskite, thermal radiation, electrochromic, Joule heat

中图分类号: