Effects of the precursor size on the morphologies and properties of 纬-Ce₂S₃ as a pigment

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• 作者：Shiyong YU ((浜庝笘娉?) ; Dongri WANG ((鐜嬩笢鏃?) ; Xiaolong GAO ((楂樺皬榫?) ; Haiquan SU ((鑻忔捣鍏?) ; ^{haiquansu@yahoo.com" class="auth_mail}
• 关键词：ceria sphere ; size ; 纬-Ce2S3 ; low temperature ; pigmentary performance ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：June 2014
• 年：2014
• 卷：32
• 期：6
• 页码：540-544
• 全文大小：898 K

文摘

Ceria spheres with different sizes and sulfurized products with corresponding morphology were prepared by hydrothermal and gas-solid reaction method at 600–800 °C under CS₂ atmosphere for a short time, respectively. Dimensional effect in preparation of 纬-Ce₂S₃ was firstly investigated by means of techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and spectrophotometer. The results showed that when ceria nanoparticles with small size were used as precursors, the 纬-Ce₂S₃ could be prepared at the lower temperature and the badly sintered products were obtained; when ceria nanoparticles with large size were employed as precursors, pure 纬-Ce₂S₃ was difficultly obtained even if the temperature was up to 800 °C and the products tended to keep their original size. The heat-resistance property of the 纬-Ce₂S₃ with large size was better than the smaller one, and the pure 纬-Ce₂S₃ prepared from precursor with small size had a good pigmentary performance.