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September 22, 2009

A better choice as host compound in place of AgI to prepare plus ion conducting superionic glasses and composites

Filed under: Glasses 1995 — admin @ 2:45 am

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Various transport properties, namely, the electrical conductivity, sigma , ionic transference number, t//i//o//n, ionic mobility, mu , etc. were measured for the quenched [0.75AgI:0.25AgCl] system. The mobile ion concentration, n, was calculated using sigma and mu data. The results were compared with the values for AgI. The quenched [0.75AgI:0.25AgCl] system exhibited a beta yields alpha like transition in the log sigma versus 1/T plot at approximately 135 degree C identical to AgI. The present investigations suggest that the quenched [0.75AgI:0.25AgCl] mixed system is a better choice as a host compound in place of AgI to prepare Ag**P**L**U ion conducting superionic glasses and composites. Using the quenched [0.75AgI:0.25AgCl] system as host, the following superionic solid systems were prepared and studied: (A) (1) x [0.75AgI:0.25AgCl] :(1 minus x) [Ag//2O center dot B//2O//3] , (2) x [0.75AgI:0.25AgCl] :(1 minus x) [Ag//2O center dot B//2O//3] , (by the melt-quench method (glass systems)); (B) (1) (1 minus x) [0.75AgI:0.25AgCl] : x Al//2O//3 (by dispersing second-phase particles of size ( less than 10 mu m) (composite system)). The results of the variation of the room temperature conductivity as a function of the molar weight ratio, x, for the above systems are reported and compared with the results for similar systems using AgI as host. ( Author abstract) 26 Refs.

Agrawal, R.C. Kumar, R. Gupta, R.K. Saleem, M.

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