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

Authors
Pandey, K Lakshmi, N
Citation
K. Pandey et N. Lakshmi, Evidence of failure of hopping model of ionic conductivity in phosphomolybdic acid studied by a.c. conductivity measurements, J MATER SCI, 34(8), 1999, pp. 1749-1752
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE
ISSN journal
00222461 → ACNP
Volume
34
Issue
8
Year of publication
1999
Pages
1749 - 1752
Database
ISI
SICI code
0022-2461(19990415)34:8<1749:EOFOHM>2.0.ZU;2-G
Abstract
The a.c. conductivity measurement has been used to probe into the possible conduction mechanisms (Vehicle or Hopping) in proton conducting acid hydrat e Phosphomolybdic acid H3PO4. 12MoO(3). nH(2)O. The magnitude of hopping ra te and its temperature dependence evaluated from a.c. conductivity data doe s not favour the hopping mechanism of conduction. The value of activation e nergy (Ea similar to 0.76 eV) supports the vehicle mechanism of ion transpo rt. (C) 1999 Kluwer Academic Publishers.