ABSTRACT
The coefficient of thermal expansion of sapphire α has been measured by Yim and Paff in the temperature range 20–800°C. Values of α at 20°C are 7.0 and 8.7 × 10−6/°C parallel to the a- and c-axes, respectively. The specific heat of sapphire as a function of temperature from 0 to 1200 K has been measured by Furukawa. The value of the specific heat at 300 K is 80 J/K.Mole. The specific heat of sapphire has been measured from 2 to 25 K by Fugate and Swenson. These results are in good agreement with those of Furukawa. The thermal conductivity of sapphire over the temperature range ∼120–750 K has been measured by Cahill et al. The value of thermal conductivity at 300 K is ∼35 W/m.K.
