Thermoanalytical investigations on the solid-state synthesis of Sr-doped praseodymium alkaline-earth cobalt oxides

• Published in: Journal of thermal analysis and calorimetry 2012-11, Vol.110 (2), p.755-764
• Main Authors: Magnone, Edoardo, Kim, Jong Pyo, Park, Jung Hoon
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...); Exact sciences and technology; Inorganic Chemistry; Inorganic chemistry and origins of life; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Preparations and properties
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-011-1976-9

In this study, the formation and characteristics of Sr-doped praseodymium alkaline-earth cobalt oxide were studied as a function of the strontium content ( x ). PrBa 1− x Sr x Co 2 O 5+ d ceramics with x  = 0.0, 1/16, 1/8, 1/4, and 1/2.5 were prepared by solid-state reaction method from Pr 6 O 11 , BaCO 3 , SrCO 3 , and Co 3 O 4 . The solid-state reaction mechanisms were analyzed by differential thermal analysis (DTA) and thermogravimetry (TG) techniques to characterize properly the distinct thermal events occurring during synthesis of layered perovskite-type PrBa 1− x Sr x Co 2 O 5+ d oxides. The X-ray diffraction (XRD) results were used to assist the interpretation of DTA–TG analyses. The TG, DTA, and XRD results for the mixtures showed that the solid-state reaction between precursors was completed in a temperature range between 800 and 1000 °C. The strong influence of strontium contents ( x ) on the solid-state reaction temperatures and PrBa 1− x Sr x Co 2 O 5+ d structure was found.