光谱学与光谱分析 |
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Preparation of La2Zr2O7 Powder with Combustion Method and Its Spectral Properties |
LIU Xiao-zhen1, ZHANG Cheng1, CHEN Jie2, SHEN Qin-wei1, GUO Ling-ling1, XIE Guang1 |
1. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China 2. Regenia AB, Stockholm 10691, Sweden |
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Abstract La2Zr2O7 powder was prepared with combustion method with La2O3, Zr(NO3)4 and glycine as raw materials. La2Zr2O7 powders were characterized with ICP-AES, EDAX, XRD, IR and TG-DTA techniques, respectively. Effects of heat treatment temperature on the XRD spectra and IR spectra of La2Zr2O7 powders were studied. The X-ray diffraction pattern of La2Zr2O7 powder after heat treatment at 600 ℃ has one diffraction peak, and the diffraction peak is quite broad, therefore, the crystal structure of the La2Zr2O7 powder is semi-crystal structure. With the increase of heat treatment temperature, diffraction peaks become gradually sharp and increase. The crystal structure of the La2Zr2O7 powders after heat treatment in 750~800 ℃ are pyrochlore structure. Analysis results of IR spectra of La2Zr2O7 powders after heat treatment in 650~750 ℃ show that the crystal structure of the La2Zr2O7 powders after heat treatment at 750 ℃ is pyrochlore structure, and the analysis results of XRD and IR are the same. Analysis results of TG-DTG of La2Zr2O7 powders show that the crystal structure of the La2Zr2O7 powders are stability in 120~1 600 ℃.
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Received: 2015-11-06
Accepted: 2016-02-25
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Corresponding Authors:
LIU Xiao-zhen
E-mail: liuxiaozhen5291@163.com
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