Spectroscopy and Spectral Analysis, Volume. 36, Issue 12, 4063(2016)
Preparation of La2Zr2O7 Powder with Combustion Method and Its Spectral Properties
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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LIU Xiao-zhen, ZHANG Cheng, CHEN Jie, SHEN Qin-wei, GUO Ling-ling, XIE Guang. Preparation of La2Zr2O7 Powder with Combustion Method and Its Spectral Properties[J]. Spectroscopy and Spectral Analysis, 2016, 36(12): 4063
Received: Nov. 6, 2015
Accepted: --
Published Online: Dec. 30, 2016
The Author Email: Xiao-zhen LIU (liuxiaozhen5291@163.com)