Defect interaction and solid electrolyte transition in AgI-based materials |
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| Authors: | J.C. Burbano R.A. Vargas D. Pe?a Lara C.A. Lozano Z. H. Correa |
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| Affiliation: | 1. Departamento de Física, Universidad del Valle, A. A. 25360, Cali, Colombia;2. Grupo de Automática y Robótica, Pontificia Universidad Javeriana, Cali, Colombia;3. Laboratorio de Optoelectrónica, Universidad del Quindío, Armenia, Colombia |
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| Abstract: | The first-order phase transition that leads to the superionic phase in AgI-based materials is studied by dc-conductivity measurements and a free energy model. By properly adjusting the model parameters, an abrupt change of disordering concentration, Δη?, is predicted at a transition temperature, Tt. The temperature dependence of the dc-conductivity, σ(T), is well fitted to the η?(T) equilibrium configuration obtained from the trial free energy function. The reported comparative study was done using an AgI–KI modified sample. The model also predicts a transition temperature, Tc for a continuous phase transition (Δη? = 0). |
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