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

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• 作者：Edoardo Magnone (1)
  Jong Pyo Kim (2)
  Jung Hoon Park (1)
  
• 关键词：Layered perovskite ; type PrBa1?x Sr x Co2O5+d oxides ; Thermoanalytical investigations ; XRD ; Reactivity of solids ; Solid ; state reaction
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2012
• 出版时间：November 2012
• 年：2012
• 卷：110
• 期：2
• 页码：755-764
• 全文大小：1049KB
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• 作者单位：Edoardo Magnone (1)
  Jong Pyo Kim (2)
  Jung Hoon Park (1)
  
  1. Greenhouse Gas Research Center, Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon, 305-343, Republic of Korea
  2. Department of Chemical Engineering, Chungnam National University, 220, Gung-dong Yuseong-gu, Daejeon, 305-764, Republic of Korea
  
• ISSN：1572-8943

文摘

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). PrBa1?em class="a-plus-plus">x Sr x Co2O5+d ceramics with x?=?0.0, 1/16, 1/8, 1/4, and 1/2.5 were prepared by solid-state reaction method from Pr6O11, BaCO3, SrCO3, and Co3O4. 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 PrBa1?em class="a-plus-plus">x Sr x Co2O5+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 PrBa1?em class="a-plus-plus">x Sr x Co2O5+d structure was found.