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

摘要：

　　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 ℃,and the crystal size of the nanocrystals increased with increasing thermal treatment temperature.Gd2Zr2O7 with an excellent defective fluorite structure,which belongs to the Fm(3)m space group,was prepared after treatment at 900 ℃ for 2 h.The Gd2Zr2O7 crystallites consist of 50 nm to 60 nm spherical particles with agglomerated structures.In addition,the di11 and d222 interplanar distances were 0.310 and 0.152 nm,respectively,which were measured from high resolution transmission electron microscopy images.

关键词： Nanostructure materials Ceramics X-ray diffraction Sol-gel preparation Defective fluorite structure

作者: Lei Ma Weimin Ma Xudong Sun

作者单位: Institute of Metallurgy and Materials,Northeastern University,Shenyang,China;Key Laboratory for Adva Key Laboratory for Advanced Ceramics and Application of Shenyang,Shenyang University of Chemical Tec Institute of Metallurgy and Materials,Northeastern University,Shenyang,China

会议类型: 国际会议

会议名称: 3rd International Conference on Testing and Evalution of Inorganic Materials(第三届无机材料测试与评价学术年会(TEIM2012))

会议地点: 景德镇

会议语种:英文

页码: 8-12

在线出版日期: 2012-10-15（万方平台首次上网日期，不代表论文的发表时间）