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

• Published in: Journal of rare earths Vol. 32; no. 6; pp. 540 - 544
• Main Author: 于世泳 王东日 高小龙 苏海全
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2014
• Subjects: ceria sphere; low temperature; pigmentary performance; rare earths; size; γ-Ce2S3; 二氧化铈; 分光光度计; 前体; 形貌; 扫描电子显微镜; 纳米颗粒; 耐热性能; 颜料; ceria sphere; γ-Ce2S3; size; pigmentary performance; low temperature; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(14)60105-8

Ceria spheres with different sizes and sulfurized products with corresponding morphology were prepared by hydro-thermal and gas-solid reaction method at 600-800℃ under CS2 atmosphere for a short time, respectively. Dimensional effect in preparation ofγ-Ce2S3 was firstly investigated by means of techniques such as scanning electron microscopy （SEM）, X-ray dif-fraction （XRD）, thermal gravimetric analysis （TGA） and spectrophotometer. The results showed that when ceria nanoparticles with small size were used as precursors, theγ-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, pureγ-Ce2S3 was difficultly obtained even if the temperature was up to 800℃ and the products tended to keep their original size. The heat-resistance property of theγ-Ce2S3 with large size was better than the smaller one, and the pureγ-Ce2S3 prepared from precursor with small size had a good pigmen-tary performance.