Abstract
Thermal conductivity of some complex silicate glasses was measured at 25°C by the steady-state method. The conductivity values decreased progressively with increasing ZnO content (instead of CaO) in the glass composition. However, this replacement caused an increase of some physical properties like density and refractive index. The same trend was also obtained on Li 2O additions. Fair agreement was observed between the experimental conductivity and theoretical values calculated by the least-squares method as well as those obtained using the density values. The dependence of thermal conductivity on the role played by Zn 2+ or Li + in the glass structure are discussed.
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