利用Ca2+掺杂增强钙钛矿型LaFeO3的红外发射率

doi:10.12034/j.issn.1009-606X.217209

过程工程学报 ›› 2018, Vol. 18 ›› Issue (1): 154-158.DOI: 10.12034/j.issn.1009-606X.217209

利用Ca2+掺杂增强钙钛矿型LaFeO3的红外发射率

韩召^1,2^*，刘鹏飞¹，李小伟¹，卢卫华¹

1. 安徽工业大学冶金工程学院，安徽马鞍山 243032；2. 安徽工业大学冶金减排与资源综合利用教育部重点实验室，安徽马鞍山 243032

收稿日期:2017-04-10 修回日期:2017-05-29 出版日期:2018-02-22 发布日期:2018-01-29
通讯作者: 韩召 authan@163.com
基金资助:
国家自然科学基金青年项目;钢铁冶金新技术国家重点实验室开放研究项目

Highly Enhanced Infrared Emissivity of Perovskite LaFeO3 by Ca2+ Doping

Zhao HAN^1,2^*, Pengfei LIU¹, Xiaowei LI¹, Weihua LU¹

1. School of Metallurgy Engineering, Anhui University of Technology, Ma?anshan, Anhui 243032, China; 2. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Anhui University of Technology, Ma?anshan, Anhui 243032, China

Received:2017-04-10 Revised:2017-05-29 Online:2018-02-22 Published:2018-01-29

摘要/Abstract

摘要： 采用固相反应法，在空气气氛中制备了纯LaFeO3和Ca2+掺杂的LaFeO3，对其在近红外波段的发射率进行了研究和比较. 结果表明，掺杂10mol% Ca2+的La0.9Ca0.1FeO3在3?5 ?m波段的红外发射率达0.92，比纯LaFeO3提高了119%. 原因为Ca2+掺杂进入LaFeO3的晶格后，在其半导体带隙中引入Fe4+杂质能级，形成了跃迁激活能仅需0.1 eV的Fe3+?Fe4+小极化子吸收带，增强了LaFeO3的红外辐射性能.

关键词: 热辐射, 红外发射率, 钙钛矿, 铁酸镧, 掺杂

Abstract: Pure LaFeO3 and Ca2+-doped LaFeO3 ceramics were prepared by solid-state reaction in air atmosphere, and their near-infrared (NIR) emissivity characteristics were investigated and compared with each other. The results revealed that 10mol% Ca2+-doped LaFeO3, namely La0.9Ca0.1FeO3, exhibited a NIR emissivity as high as 0.92 in the wavelength region of 3?5 ?m, which was 119% higher than that of pure LaFeO3. The reason was Ca2+-doped LaFeO3 mainly attributed to the electronic transition absorption of Fe3+?Fe4+ small polarons introduced by Ca2+ doping.

韩召刘鹏飞李小伟卢卫华. 利用Ca2+掺杂增强钙钛矿型LaFeO3的红外发射率[J]. 过程工程学报, 2018, 18(1): 154-158.

Zhao HAN Pengfei LIU Xiaowei LI Weihua LU. Highly Enhanced Infrared Emissivity of Perovskite LaFeO3 by Ca2+ Doping[J]. Chin. J. Process Eng., 2018, 18(1): 154-158.

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利用Ca2+掺杂增强钙钛矿型LaFeO3的红外发射率

Highly Enhanced Infrared Emissivity of Perovskite LaFeO3 by Ca2+ Doping

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