Analysis of composition and temperature dependence of some thermal transport properties in glassy Ge30−xSe70Snx alloys using transient plane source technique
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Measurements of thermal transport properties such as effective thermal conductivity (λ e) and effective thermal diffusivity (k e) of Ge30−xSe70Snx (x = 8, 11, 14, 17, and 20) chalcogenide glasses have been made using transient plane source technique in temperature range from room temperature to 300 °C. Both effective thermal conductivity (λ e) and effective thermal diffusivity (k e) are almost constant in the temperature range from room temperature to 240 °C. Beyond 240 °C, both λ e and k e increase with the increase in temperature and show maxima at a particular temperature which is a characteristic temperature for a given material. For further increase in temperature, both λ e and k e decrease slowly. Addition of Sn concentration in the glass increases the value of λ e and k e over the entire range of temperature under investigation for all five samples. Here, an effort has also been made to predict the values of both λ e and k e by using empirical relationships.
KeywordsChalcogenide glasses Transient plane source technique Effective thermal conductivity Effective thermal diffusivity Empirical relation
One of the authors (Vandana Kumari) is thankful to Council of Scientific and Industrial Research (CSIR), New Delhi (India), for providing financial assistance in the form of research scholarship. We are also thankful to Dr. Mahesh Baboo for his help in various ways during the course of this work.
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