协同掺杂MnO2与CeO2对钙钛矿类LaAlO3陶瓷显微结构与红外辐射性能的影响

doi:10.11896/cldb.21030158

材料导报

2022, Vol. 36

Issue (16): 21030158-4 https://doi.org/10.11896/cldb.21030158

无机非金属及其复合材料

协同掺杂MnO₂与CeO₂对钙钛矿类LaAlO₃陶瓷显微结构与红外辐射性能的影响

王博知¹, 孙维义², 简韬¹, 张云蔚¹, 吴开霞¹, 李三雁^1,*

1 四川大学锦城学院,成都 611731
2 四川大学建筑与环境学院,成都 610065

Effect of Co-doping MnO₂ and CeO₂ on Microstructure and Infrared Radiation Performance of Perovskite LaAlO₃ Ceramics

WANG Bozhi¹, SUN Weiyi², JIAN Tao¹, ZHANG Yunwei¹, WU Kaixia¹, LI Sanyan^1,*

1 Jincheng College, Sichuan University, Chengdu 611731, China
2 School of Architecture and Environment, Sichuan University, Chengdu 610065, China

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摘要本工作采用固相反应法制备La_0.8Ce_0.2Mn_xAl_1-xO₃ (x=0、0.15、0.3、0.45、0.6)钙钛矿类红外陶瓷,研究了MnO₂与CeO₂协同掺杂对LaAlO₃钙钛矿陶瓷物相变化、微观结构、红外辐射特性的影响。结果表明,固定CeO₂添加量,样品的红外辐射性能随着MnO₂掺入量的增加而得到提升。比较对照组La_0.8Ce_0.2AlO₃与性能最佳组La_0.8Ce_0.2Mn_0.6Al_0.4O₃样品发现,样品的红外发射率在8~14 μm远红外波段范围内由0.596提升至0.909,提高了52.5%。结果证明了MnO₂与CeO₂共掺杂的方式改变了LaAlO₃晶体结构中的离子分布状态并提高了连接键非对称振动强度,最终有效地提升了LaAlO₃陶瓷的远红外辐射性能。

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关键词: 协同掺杂 LaAlO₃ 红外辐射发射率

Abstract: In this work, La_0.8Ce_0.2Mn_xAl_1-xO₃ (x=0, 0.15, 0.3, 0.45, 0.6) perovskite infrared ceramics were prepared through solid-state reaction. The effect of co-doping MnO₂ and CeO₂ on the phase change, microstructure and infrared radiation characteristics of LaAlO₃ perovskite ceramics were studied. The results show that the infrared radiation performance of the samples was improved with the increase of the MnO₂ content, when the amount of CeO₂ was fixed. The infrared emissivity of La_0.8Ce_0.2AlO₃ in the control group and La_0.8Ce_0.2Mn_0.6Al_0.4O₃ in the best performance group increased from 0.596 to 0.909 in the far infrared band range of 8—14 μm, increasing by 52.5%. It is proved that the co-doping of MnO₂ and CeO₂ can change the ion distribution state in LaAlO₃ crystal structure, enhance the asymmetric vibration intensity of the link bond and finally effectively improve the far-infrared radiation performance of LaAlO₃ ceramics.

Key words: coordinated doping LaAlO₃ infrared radiation emissivity

出版日期: 2022-08-25 发布日期: 2022-08-29

ZTFLH:

TQ171

基金资助: 四川大学锦城学院校级基金(2020jcky0014)

通讯作者: ^*615971969@qq.com

作者简介: 王博知,2018年毕业于四川大学建筑与环境学院环境工程专业,获得工程硕士学位。研究方向为环境材料。李三雁,教授,硕士研究生导师,高级工程师,发表科研论文51篇,编辑教材两本。

引用本文:

王博知, 孙维义, 简韬, 张云蔚, 吴开霞, 李三雁. 协同掺杂MnO₂与CeO₂对钙钛矿类LaAlO₃陶瓷显微结构与红外辐射性能的影响[J]. 材料导报, 2022, 36(16): 21030158-4.
WANG Bozhi, SUN Weiyi, JIAN Tao, ZHANG Yunwei, WU Kaixia, LI Sanyan. Effect of Co-doping MnO₂ and CeO₂ on Microstructure and Infrared Radiation Performance of Perovskite LaAlO₃ Ceramics. Materials Reports, 2022, 36(16): 21030158-4.

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http://www.mater-rep.com/CN/10.11896/cldb.21030158 或 http://www.mater-rep.com/CN/Y2022/V36/I16/21030158

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