Ionic conductivity and structure of thallium tellurite glasses containing AgI

• Published in: Journal of non-crystalline solids Vol. 162; no. 3; pp. 244 - 252
• Main Authors: Rossignol, S., Réau, J.M., Tanguy, B., Videau, J.J., Portier, J., Dexpert-Ghys, J., Piriou, B.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.1993; Elsevier
• Subjects: Condensed matter: structure, mechanical and thermal properties; Diffusion in solids; Exact sciences and technology; Physics; Self-diffusion and ionic conduction in nonmetals; Transport properties of condensed matter (nonelectronic); Temperature dependence; Noncrystalline structure; Inorganic compounds; Transition element compounds; Ionic conductivity; Glass; Infrared spectra; Experimental study; Tellurites; Silver iodides; Thallium oxides; Quantity ratio; Absorption spectra; Activation energy
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/0022-3093(93)91243-V

The ionic conductivities of [TeO 2: RTlO 0.5] (1− x) [AgI] ( x) glasses have been determined and compared with those of compositions [TeO 2: RAgO 0.5] (1− x) [AgI] ( x) . The conductivity increases when x rmAgI increases, but lower conductivities are observed for glasses based on thallium tellurite than for those based on silver tellurite. It is concluded from the conductivity variation with the glass composition that the ionic conductivity properties are bound essentially to the mobility of the Ag + ions located in an iodide environment. The IR and Raman spectra of ternary [TeO 2: RTlO 0.5] (1− x) [AgI] ( x) glasses show only small modifications of the tellurite network, irrespective of the amount of AgI introduced into the binary glasses. The existence of intermediate-range order in these materials is discussed.