ENHANCED ELECTRICAL-CONDUCTIVITY OF CUBR-TIO2 COMPOSITES - DEPENDENCEON TEMPERATURE, VOLUME FRACTIONS AND GRAIN SIZES

Authors
KNAUTH P ALBINET G DEBIERRE JM
Citation
P. Knauth et al., ENHANCED ELECTRICAL-CONDUCTIVITY OF CUBR-TIO2 COMPOSITES - DEPENDENCEON TEMPERATURE, VOLUME FRACTIONS AND GRAIN SIZES, Berichte der Bunsengesellschaft fur Physikalische Chemie, 102(7), 1998, pp. 945-952
Citations number
37
Categorie Soggetti
Chemistry Physical
Journal title
Berichte der Bunsengesellschaft fur Physikalische Chemie
ISSN journal
00059021 → ACNP
Volume
102
Issue
7
Year of publication
1998
Pages
945 - 952
Database
ISI
SICI code
0005-9021(1998)102:7<945:EEOCC->2.0.ZU;2-P
Abstract
Composites of a solid ionic conductor (copper(I) bromide) and an insul ator (titanium dioxide) with carefully characterized purity and grain size are studied by impedance spectroscopy. The experimental dependenc e of electrical conductivity on temperature, volume fractions and grai n sizes of the components is reported and interpreted in the framework of the space charge layer concept. An enhancement of conductivity by several decades compared with pure copper(I) bromide is observed and d escribed by a percolation-type model, which takes the effects of grain sizes and interfacial interactions into account.