燃烧法合成La_2Zr_2O_7粉及其光谱性能 |
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引用本文: | 刘小珍,张骋,陈捷,沈钦伟,郭玲玲,谢广. 燃烧法合成La_2Zr_2O_7粉及其光谱性能[J]. 光谱学与光谱分析, 2016, 0(12): 4063-4066. DOI: 10.3964/j.issn.1000-0593(2016)12-4063-04 |
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作者姓名: | 刘小珍 张骋 陈捷 沈钦伟 郭玲玲 谢广 |
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作者单位: | 1. 上海应用技术学院化学与环境工程学院,上海,201418;2. Regenia AB,Stockholm 10691,Sweden |
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基金项目: | 国家自然科学基金项目(51172144;51372153),上海市高峰高原学科项目(0817),上海高校特聘教授(东方学者)岗位计划项目(DF2009-02) |
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摘 要: | 以La_2O_3,Zr(NO_3)_4和甘氨酸为原料,采用燃烧法合成La_2Zr_2O_7粉。分别用发射光谱法(ICPAES)、能谱法(EDAX)、X衍射法(XRD)、红外光谱法(IR)和热重-差热法(TG-DTA)等对La_2Zr_2O_7粉进行表征。分别研究了热处理温度对La_2Zr_2O_7粉的X衍射谱和红外光谱的影响。La_2Zr_2O_7粉的ICP-AES和EDAX分析结果表明,用燃烧法可合成出La_2Zr_2O_7粉。不同温度热处理后La_2Zr_2O_7粉的XRD分析结果表明,当热处理温度为600℃时,出现一个衍射峰,且衍射峰较宽,该结构为半晶型结构;提高热处理温度,衍射峰逐渐尖锐,峰形变窄,衍射峰逐渐增多;热处理温度在750~800℃范围,可得到烧绿石结构的La_2Zr_2O_7粉。在650~750℃热处理后La_2Zr_2O_7粉的红外光谱分析结果与XRD分析结果相同,热处理温度为750℃时,可得到烧绿石结构的La_2Zr_2O_7粉。La_2Zr_2O_7粉的TG-DTG分析结果表明,在120~1 600℃范围,La_2Zr_2O_7粉的结构稳定。
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关 键 词: | 燃烧法 La2Zr2O7粉 X衍射谱 能谱 红外光谱 |
Preparation of La2 Zr2 O7 Powder with Combustion Method and Its Spectral Properties |
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Abstract: | La2 Zr2 O7 powder was prepared with combustion method with La2 O3 ,Zr (NO3 )4 and glycine as raw materials. La2 Zr2 O7 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 La2 Zr2 O7 powders were studied.The X-ray diffraction pattern of La2 Zr2 O7 powder after heat treatment at 600 ℃ has one diffraction peak,and the diffraction peak is quite broad,therefore,the crystal structure of the La2 Zr2 O7 powder is semi-crystal structure.With the increase of heat treatment temperature,diffraction peaks become gradually sharp and increase.The crystal structure of the La2 Zr2 O7 powders after heat treatment in 750~800 ℃are pyrochlore structure.Analysis results of IR spectra of La2 Zr2 O7 powders after heat treatment in 650~750 ℃ show that the crystal structure of the La2 Zr2 O7 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 La2 Zr2 O7 powders show that the crystal structure of the La2 Zr2 O7 powders are stability in 120~1 600 ℃. |
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Keywords: | Combustion method La2 Zr2 O7 powder XRD EDAX IR |
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