Thermal Conductivity of Glasses

Table 4.11 Factors Used to Determine Thermal Conductivity of Glasses Based on Composition Using Eq. (4.45)...

Primenko, V. L, Theoretical method of determining the temperature dependence of the thermal conductivity of glasses. Glass Ceram., 37, 240-242 (1980). 

Most data pertaining to the thermal conductivity of glasses show an increase with temperature in the region above the plateau. In all the alcohols investigated, the thermal conductivity starts to increase with temperature again after passing through a smeared minimum. 

Hot-melt adhesives, because of the high temperature of the melt and very low thermal conductivity of glass (risk of fracture). 

Qualitatively explain how the following parameters would affect the final value of the residual stresses in a tempered glass pane (a) thickness of glass, (b) thermal conductivity of glass, (c) quench temperature, (d) quench rate. 

Thermal Stresses. Owing to the low thermal conductivity of glasses (t3q)ically 0.9-1.2W/mK at 90 °C, and a minimum of 0.6 W/mK for high-lead-content glasses), temperature changes produce relatively high temperature differences AT between the surface and... 

The range of values for the thermal conductivity of glasses at room temperature extends from 1.38 W/mK (pure vitreous silica) to about 0.5 W/m K (high-lead-content glasses). The most commonly used silicate glasses have values between 0.9 and 1.2W/mK. All data in Table 3.4-16c are given for a temperature of 90 °C, with an accuracy of 5%. 

Endrys J. Measurements of radiative and effective thermal conductivity of Glass Service, IV. International seminar on mathematical simulation in glass melting, 1997, Homi Becva, Czech Republic. 

Figure 2-23 Thermal conductivity of glass/alumina composite (actual measurement and calculated value). The numbers in the Figure correspond to the formula numbers.

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