| 利用Ca2+掺杂增强钙钛矿型LaFeO3的红外发射率 |
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| 引用本文： | 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. |
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| 作者姓名： | 韩召 刘鹏飞 李小伟 卢卫华 |
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| 作者单位： | 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 |
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| 基金项目： | 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 |
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| 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.
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| 关 键 词： | 热辐射 红外发射率 钙钛矿 铁酸镧 掺杂 |
| 收稿时间： | 2017-04-10 |
Highly Enhanced Infrared Emissivity of Perovskite LaFeO3 by Ca2+ Doping |
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| Zhao HAN,Pengfei LIU,Xiaowei LI,Weihua LU.Highly Enhanced Infrared Emissivity of Perovskite LaFeO3 by Ca2+ Doping[J].Chinese Journal of Process Engineering,2018,18(1):154-158. |
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| Authors: | Zhao HAN Pengfei LIU Xiaowei LI Weihua LU |
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| Affiliation: | 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 |
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| 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. |
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