以La2O3, Zr(NO3)4和甘氨酸为原料, 采用燃烧法合成La2Zr2O7粉。 分别用发射光谱法(ICP-AES)、 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La2Zr2O7粉进行表征。 分别研究了热处理温度对La2Zr2O7粉的X衍射谱和红外光谱的影响。 La2Zr2O7粉的ICP-AES和EDAX分析结果表明, 用燃烧法可合成出La2Zr2O7粉。 不同温度热处理后La2Zr2O7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La2Zr2O7粉。 在650～750 ℃热处理后La2Zr2O7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La2Zr2O7粉。 La2Zr2O7粉的TG-DTG分析结果表明, 在120～1 600 ℃范围, La2Zr2O7粉的结构稳定。

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 ℃.