Thermal behavior and dielectric and vibrational studies of Cs2(HAsO4)0.32(SO4)0.68·Te(OH)<sub clas

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• 作者：O. Mtioui ; H. Litaiem ; S. Garcia-Granda ; L. Ktari ; M. Dammak
• 关键词：AC conductivities ; Tellurate ; Superprotonic–ionic ; XRD ; FTIR
• 刊名：Ionics
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：21
• 期：2
• 页码：411-420
• 全文大小：1,478 KB
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  31. Ky
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760

文摘

A new compound from the tellurate family was synthesized under a slow evaporation conditions. A crystalline sample of Cs2sub>(HAsO4sub>)0.32sub>(SO4sub>)0.68sub>·Te(OH)6sub> (CsAsSTe) was calorimetric and spectroscopically characterized. The infrared and Raman spectra of this new compound recorded at room temperature, in the frequency range 500-,500 and 50-,500?cm?, respectively, confirm the presence and the independence of two types of anion HAs/SO4sub> and TeO6sub>. The thermal analysis of the title compound shows one endothermal and intense peak at 512?K accompanied by a shoulder at 506?K. However, the conductivity evolution versus temperature showed the presence of the protonic super conduction phase transition. The conductivity relaxation parameters of some H+ and Cs+ conducting in the CsAsSTe material have been determined from an analysis of ac conductivity data measured in a wide temperature range. Transport properties in this compound appear due to H+ ions hopping mechanism.