Article ID Journal Published Year Pages File Type
1484628 Journal of Non-Crystalline Solids 2008 7 Pages PDF
Abstract

The addition of polyvalent transition metal ions to the usually insulating traditional soda-lime–silica glasses can lead to semiconducting properties. We report on synthesis of glasses and glass-ceramics in a soda-lime-silicate based system containing Fe2O3 in the concentration range from 5 to 30 mol%. Two sub-systems were considered, in one of them the ratio [Na2O]/[Fe2O3] was varied while in the other one, the ratio [SiO2]/[Fe2O3] was changed. The phase composition of the synthesized products was characterized by X-ray diffraction and energy dispersive X-ray analysis, while the electrical properties were studied by impedance spectroscopy. Partially crystallized non-reduced samples are semiconducting even at room temperature while the glassy samples (both reduced and non-reduced) exhibit semiconducting properties at temperatures equal or larger than 100 °C. An attempt is done to predict the physical approximation explaining the conduction process in the glasses.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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