MICROSTRUCTURE OBSERVATION AND ELECTRICAL CONDUCTIVITIES OF PROTON-CONDUCTING TiO2-P2O5 GLASS-CERAMIC SOLID ELECTROLYTES

MICROSTRUCTURE OBSERVATION AND ELECTRICAL CONDUCTIVITIES OF PROTON-CONDUCTING TiO2-P2O5 GLASS-CERAMIC SOLID ELECTROLYTES

A new, fast proton-conducting TiO2-P2O5 glass-ceramic was developed and investigated through microstructure observation and electrical conductivity measurements. TiO2-P2O5 glass-ceramic samples were prepared by a sol-gel method and post-annealing heat treatment. With an increase in the post-annealin...

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Veröffentlicht in:Phosphorus Research Bulletin 2013, Vol.28, pp.24-29
Hauptverfasser: Kawamura, Ryoto, Sakamoto, Ryosuke, Oshima, Yoshito, Otomo, Junichiro
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Sprache:eng
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Electrical conductivity
Glass-ceramic
Interface
Proton conductor
Sol-gel synthesis
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container_title Phosphorus Research Bulletin
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creator Kawamura, Ryoto
Sakamoto, Ryosuke
Oshima, Yoshito
Otomo, Junichiro
description A new, fast proton-conducting TiO2-P2O5 glass-ceramic was developed and investigated through microstructure observation and electrical conductivity measurements. TiO2-P2O5 glass-ceramic samples were prepared by a sol-gel method and post-annealing heat treatment. With an increase in the post-annealing temperature, growth of TiP2O7 crystals in the TiO2-P2O5 glassy phase was observed. In addition, a tenfold enhancement in maximum conductivity was observed after post-annealing heat treatment compared with the as-prepared sample and polycrystalline TiP2O7. The interfacial layer between the TiO2-P2O5 glassy phase and the TiP2O7 crystal phase may act as a fast proton-conducting path, thereby improving the total conductivity. This hypothesis is discussed using the brick layer model.
doi_str_mv 10.3363/prb.28.24
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subjects Electrical conductivity
Glass-ceramic
Interface
Proton conductor
Sol-gel synthesis
title MICROSTRUCTURE OBSERVATION AND ELECTRICAL CONDUCTIVITIES OF PROTON-CONDUCTING TiO2-P2O5 GLASS-CERAMIC SOLID ELECTROLYTES
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