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Preparation and Characterization of Gd2Zr2O7 Nanoparticles via the Citric Acid Chelating Agent Method
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Preparation and Characterization of Gd2Zr2O7 Nanoparticles via the Citric Acid Chelating Agent Method

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Abstract:

Gd2Zr2O7 nanocrystals with cubic structure were prepared via the citric acid chelating agent method using zirconium oxychloride and gadolinium oxide as starting materials. The samples was characterized using thermal gravimetric-differential thermal analysis, X-ray diffraction technique, Fourier transform infrared methods, transmission electron microscopy technique, and laser particle size analyzer instrument. The effect of the heat treatment temperature on the Gd2Zr2O7 nanocrystal grain size was also analyzed. The results show that citric acid and ethylene glycol underwent esterification, and the metal ions were wrapped in an organic network, resulting in molecular-level dispersion. A single Gd2Zr2O7 phase was formed at 600 °C, and the crystal size of the nanocrystals increased with increasing thermal treatment temperature. Gd2Zr2O7 with an excellent defective fluorite structure, which belongs to the space group, was prepared after treatment at 900 °C for 2 h. The Gd2Zr2O7 crystallites consist of 50 nm to 60 nm spherical particles with agglomerated structures. In addition, the d111 and d222 interplanar distances were 0.310 and 0.152 nm, respectively, which were measured from high resolution transmission electron microscopy images.

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Periodical:

Key Engineering Materials (Volume 544)

Pages:

8-12

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.544.8

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Online since:

March 2013

Authors:

Lei Ma, Wei Min Ma, Xu Dong Sun

Keywords:

Ceramic, Defective Fluorite Structure, Nanostructure Materials, Sol-Gel Preparation, X-Ray Diffraction (XRD)

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