抄録
After introducing the basic approach to thermal conductivity of glass, composition dependence of the thermal conductivity of oxide and chalcogenide glasses are reviewed. In simple silicate glasses, increase of the non-bridging oxygen is found to decrease the phonon mean free path and also the thermal conductivity. Substitution of silicon to aluminum in silicate glass is found to increase the thermal conductivity, which should be due to the increase of connectivity of glass network or decrease of non-bridging oxygen. In borate glasses, increase of the four-fold coordinated boron is found to increase the thermal conductivity and borate anomaly or the maximum against alkali content is found in alkali borate glasses. In borosilicate glasses, thermal conductivity is not so high compared with aluminosilicate glasses. This should be due to the difference of the vibration frequency of Si-O and B-O bonds which would cause the termination of the propagation of lattice vibration. In chalcogenide glasses, maximum of the thermal diffusivity is shown when average coordination number is 2.6.
https://ror.org/02dvjfw95 