Wide regions of glass formation have been found in the ternary system xAgI + yAg3AsO4 + (1 - x - y)AgPO3. Glasses containing up to 75 mol % AgI can be formed in sections greater than 2 cm thick without signs of devitrification. Glass transition temperatures as high as 175°C for glasses containing ∼10 mol % AgI fall to ∼45°C at the highest AgI content. An equivalent ratio of AgI:N is defined and it is found that, for all glass-forming compositions, the electrical data as expressed in the Arrhenius form, σ = A exp(-Eact/RT), log (σ/(Ω cm)-1), log (A/(Ω cm)-1), Eact/(kcal mol-1), and additionally Tg/K, can be described as linear functions of N. These data are used to give support to the view of these glasses as being hosts to a "liquidlike" AgI giving rise to the high conductivity they exhibit, as high as 0.0143 (Ω cm)-1 at room temperature for glasses containing the maximum AgI. Finally, from these linear relationships, functions for the mobility μ and number of the mobile Ag+ cations n are developed.

Glass formation and high conductivity in the ternary system AgI+Ag3AsO4+AgPO3: host to glassy AgI? / S.W. Martin, A. Schiraldi. - In: THE JOURNAL OF PHYSICAL CHEMISTRY. - ISSN 0022-3654. - 89:10(1985), pp. 2070-2076.

Glass formation and high conductivity in the ternary system AgI+Ag3AsO4+AgPO3: host to glassy AgI?

A. Schiraldi
1985

Abstract

Wide regions of glass formation have been found in the ternary system xAgI + yAg3AsO4 + (1 - x - y)AgPO3. Glasses containing up to 75 mol % AgI can be formed in sections greater than 2 cm thick without signs of devitrification. Glass transition temperatures as high as 175°C for glasses containing ∼10 mol % AgI fall to ∼45°C at the highest AgI content. An equivalent ratio of AgI:N is defined and it is found that, for all glass-forming compositions, the electrical data as expressed in the Arrhenius form, σ = A exp(-Eact/RT), log (σ/(Ω cm)-1), log (A/(Ω cm)-1), Eact/(kcal mol-1), and additionally Tg/K, can be described as linear functions of N. These data are used to give support to the view of these glasses as being hosts to a "liquidlike" AgI giving rise to the high conductivity they exhibit, as high as 0.0143 (Ω cm)-1 at room temperature for glasses containing the maximum AgI. Finally, from these linear relationships, functions for the mobility μ and number of the mobile Ag+ cations n are developed.
Silver iodide ; glass electrolytes ; ionic conductivity
Settore CHIM/02 - Chimica Fisica
THE JOURNAL OF PHYSICAL CHEMISTRY
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/190197
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