Evidence of failure of hopping model of ionic conductivity in phosphomolybdic acid studied by a.c. conductivity measurements

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• 作者：Pandey ; Kamlesh ; Lakshmi ; N&period
• 刊名：Journal of Materials Science
• 出版年：1999
• 出版时间：1999
• 年：1999
• 卷：34
• 期：8
• 页码：1749-1752
• 全文大小：55 KB

文摘

The a.c. conductivity measurement has been used to probe into the possible conduction mechanisms (Vehicle or Hopping) in proton conducting acid hydrate Phosphomolybdic acid H$\_3$PO$\_4$ · 12MoO$\_3$ · nH$\_2$O. The magnitude of hopping rate and its temperature dependence evaluated from a.c. conductivity data does not favour the hopping mechanism of conduction. The value of activation energy (Ea ∼ 0.76 eV) supports the vehicle mechanism of ion transport.