Dielectric losses measured in a sodium aluminosilicate glass by using electrical insulating barriers and non-isothermal experimental conditions |
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Authors: | F Henn G Garcia-Belmonte S Devautour-Vinot |
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Institution: | a Institut Charles Gerhardt, UMR-CNRS 5253, Université Montpellier 2, Place E. Bataillon, 34095 Montpellier cedex 5, France b Departament de Física, Universitat Jaume I, 12071 Castelló, Spain |
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Abstract: | Ac conductivity and dielectric losses are measured on a sodium aluminosilicate glass using various experimental conditions. Data obtained using metallic contacts and insulating barriers are compared. The influences of the thermal environment, i.e. iso versus non-isothermal, and of the application of a constant dc electric field, i.e. BIAS, are also investigated. It is thus shown that the use of non-isothermal conditions and insulating barriers is a convenient tool for extracting and hence for analyzing the bulk intrinsic polarization response of the sample. The analysis of this response with a simple model based on distribution of energy barriers gives some insights into the glass structure which turns out to be rather homogeneous. |
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Keywords: | 66 10 Ed 77 22 Gm 81 05 kf 84 37 +q |
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