(Ca,Fe)共掺铈酸镧陶瓷的制备及红外辐射性能研究

doi:10.15541/jim20150340

无机材料学报 ›› 2016, Vol. 31 ›› Issue (2): 185-189.DOI: 10.15541/jim20150340

(Ca,Fe)共掺铈酸镧陶瓷的制备及红外辐射性能研究

王峰^1,2, 布丛郝², 叶建克², 李江涛², 贺智勇¹, 张启富¹

(1. 中国钢研科技集团有限公司新冶集团, 北京 100081; 2. 中国科学院理化技术研究所, 北京100190)

收稿日期:2015-07-20 修回日期:2015-09-13 出版日期:2016-02-20 网络出版日期:2016-01-15
作者简介:王峰(1983–), 男, 博士. E-mail: hawk16181618@163.com
基金资助:
国家国际科技合作专项(2014DFR51010);国家自然科学基金(51372255);中国科学院国际合作局对外合作重点项目(GJHZ201310);北京市自然科学基金(2131006)

Preparation and Infrared Radiation Property of Lanthanum-cerium Oxide Ceramics by (Ca,Fe) Co-doping

WANG Feng^1,2, BU Cong-Hao², YE Jian-Ke², LI Jiang-Tao², HE Zhi-Yong¹, ZHANG Qi-Fu¹

(1. New Metallurgy Group, China Iron & Steel Research Institute Group, Beijing 100081, China; 2. Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China)

Received:2015-07-20 Revised:2015-09-13 Published:2016-02-20 Online:2016-01-15
About author:WANG Feng. E-mail: hawk16181618@163.com
Supported by:
International Science and Technology Cooperation Program of China (2014DFR51010);National Natural Science Foundation of China (51372255);External Cooperation Program of Chinese Academy of Sciences (GJHZ201310);Beijing Natural Science Foundation (2131006)

摘要/Abstract

摘要：

以La₂O₃、CeO₂、CaO和Fe₂O₃为起始原料, 采用高温固相烧结工艺制备得到(Ca,Fe)共掺铈酸镧(La_1.9Ca_0.1Ce_1.9Fe_0.1O₇)红外辐射陶瓷材料。采用X射线衍射仪、扫描电子显微镜、能谱仪、紫外-可见-近红外(UV-Vis-NIR)分光光度计分别对样品的物相组成、显微结构、化学成份、UV-Vis-NIR反射率及UV-Vis吸收进行了表征, 同时采用IR-2双波段红外发射率测量仪测试了样品3~5 μm波段的红外发射率。结果表明: 掺杂元素(Ca, Fe)均固溶进入铈酸镧晶格, 共掺后样品的晶体结构也为萤石结构; (Ca,Fe)共掺样品内部形成杂质能级, 强化了自由载流子吸收与杂质能级吸收, 使样品红外短波段(0.75~5 μm)性能由高反射转变为高吸收(辐射), 其中在0.75~2.5 μm波段的平均红外吸收率为0.88, 3~5 μm波段的红外发射率为0.752, 与未掺杂样品相比分别提高了1660%与60%。

关键词: 铈酸镧陶瓷, 掺杂, 近红外吸收, 红外发射率

Abstract:

(Ca,Fe) co-doped lanthanum-cerium oxide (La_1.9Ca_0.1Ce_1.9Fe_0.1O₇) infrared radiation ceramics were prepared via solid state reaction by using La₂O₃, CeO₂, CaO and Fe₂O₃ as starting materials. The phase, micro-structure, chemical composition, UV-Vis-NIR reflectivity spectrum, and UV-Vis absorption spectrum of the samples were characterized by X-ray diffractometer, scanning electron microscopy, energy dispersive X-ray spectroscopy, and UV-Vis-NIR spectrophotometer. The infrared emissivity of the samples in 3-5 μm waveband was also measured by an infrared emissometer. The phase and EDS analysis showed the co-doped sample also had fluorite structure, indicating that Ca and Fe irons entered the crystal lattice of lanthanum-cerium oxide. An impurity energy level was introduced into lanthanum-cerium oxide by co-doping of Ca and Fe irons, which enhanced the free-carrier absorption and impurity energy level absorption of the sample. This led to a significant increase of absorption and emission in the region of 0.75-5 μm, transforming lanthanum-cerium oxide ceramic from high reflection to high absorption (radiation) ceramic after (Ca,Fe) co-doping. The (Ca,Fe) co-doped sample exhibited an absorptivity of 0.88 in 0.75-2.5 μm waveband and an infrared emissivity of 0.752 in 3-5 μm waveband, increasing by 1660% and 60%, respectively, as compared with that of pure La₂Ce₂O₇ ceramic sample.

Key words: lanthanum-cerium oxide ceramic, doping, near-infrared absorption, infrared emissivity

中图分类号:

TQ174

王峰, 布丛郝, 叶建克, 李江涛, 贺智勇, 张启富. (Ca,Fe)共掺铈酸镧陶瓷的制备及红外辐射性能研究[J]. 无机材料学报, 2016, 31(2): 185-189.

WANG Feng, BU Cong-Hao, YE Jian-Ke, LI Jiang-Tao, HE Zhi-Yong, ZHANG Qi-Fu. Preparation and Infrared Radiation Property of Lanthanum-cerium Oxide Ceramics by (Ca,Fe) Co-doping[J]. Journal of Inorganic Materials, 2016, 31(2): 185-189.

图/表 4

图1 La2Ce2O7和La1.9Ca0.1Ce1.9Fe0.1O7陶瓷样品的XRD图谱

Fig. 1 XRD patterns of La2Ce2O7 and La1.9Ca0.1Ce1.9Fe0.1O7 ceramic samples

图2 La2Ce2O7(a)与La1.9Ca0.1Ce1.9Fe0.1O7(b)陶瓷样品的SEM照片及能谱图

Fig. 2 SEM images and EDS patterns of La2Ce2O7 (a) and La1.9Ca0.1Ce1.9Fe0.1O7 (b) ceramic samples

图3 La2Ce2O7与La1.9Ca0.1Ce1.9Fe0.1O7陶瓷样品的UV-Vis- NIR反射率图谱

Fig. 3 UV-Vis-NIR reflectivity spectra of La2Ce2O7 and La1.9 Ca0.1Ce1.9Fe0.1O7 ceramic samples

图4 La2Ce2O7和La1.9Ca0.1Ce1.9Fe0.1O7陶瓷样品的吸收图谱(a)与hν~(αhν)2关系(b)

Fig. 4 Absorption spectra (a) and plot of hν~(αhν)2 (b) of La2Ce2O7 and La1.9Ca0.1Ce1.9Fe0.1O7 ceramic samples

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(Ca,Fe)共掺铈酸镧陶瓷的制备及红外辐射性能研究

Preparation and Infrared Radiation Property of Lanthanum-cerium Oxide Ceramics by (Ca,Fe) Co-doping

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