Electrical conductivity and thermal stability of (1 − x)CsH2PO4/xSiP y O z (x = 0.2–0.7) composites

The physicochemical properties of (1 - x)CsH2PO4/xSiP y O z (x = 0.2-0.7) composites containing fine-particle silicon phosphates as heterogeneous additives have been studied at different humidities. The introduction of silicon phosphates suppresses the superionic phase transition of CsH2PO4 and incr...

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Bibliographic Details
Published in:Inorganic materials 2008-09, Vol.44 (9), p.1009-1014
Main Authors: Ponomareva, V. G., Shutova, E. S., Lavrova, G. V.
Format: Article
Language:English
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Summary:The physicochemical properties of (1 - x)CsH2PO4/xSiP y O z (x = 0.2-0.7) composites containing fine-particle silicon phosphates as heterogeneous additives have been studied at different humidities. The introduction of silicon phosphates suppresses the superionic phase transition of CsH2PO4 and increases the low-temperature conductivity of the materials, which depends significantly on humidity. The CsH2PO4-SiP y O z materials offer high conductivity (~3 X 10 to 10 S/cm at ~110-230 deg C) at low water vapor pressures (3 mol % H2O). Amorphization of the CsH2PO4 in the composites markedly changes its thermodynamic properties. The effect of long-term isothermal holding (210 deg C, 3 mol % H2O) on the conductivity of the composites has been studied.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168508090185