Sol-gel based Pechini method synthesis and characterization of Sm_1 ? xCa_xFeO₃ perovskite 0.1 ¡Ü x ¡Ü 0.5

详细信息    查看全文

• 作者：A.M. Hu¨ªzar-F¨¦lix ; T. Hern¨¢ndez ; S. de la Parra ; J. Ibarra ; B. Kharisov
• 关键词：Sol&ndash ; gel method ; Perovskite-based compounds ; Calcium ; Iron ; X-ray powder diffraction
• 刊名：Powder Technology
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：229
• 期：Complete
• 页码：290-293
• 全文大小：650 K

文摘

This study initiates the preparation of Sm_1 ? xCa_xFeO₃ (0.1 ¡Ü x ¡Ü 0.5) compounds by sol-gel based Pechini method at low temperatures. The samples are analyzed by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), and Differential Thermal Analysis (DTA) techniques for appropriate characterization of the distinct thermal events occurring during synthesis. The resulting XRD data reveal that a pure phase with perovskite structure is obtained for each composition. An exothermic peak appears in the DTA curve at 700 ¡ãC for x = 0.1 sample, suggesting a crystallization process; a similar behavior is found to occur for the other compositions as well. The microstructural characteristics of all the phases show particles of different morphology and size.