Thermal Expansion of Beryllium Oxide in the Temperature Interval $20$–$1550^{\circ}$C

The results of studies of thermal expansion of the sintered beryllium oxide within the temperature interval $20$–$1550^{\circ}$C are presented. Measurements were performed by a dilatometric method on a DIL–402C set-up manufactured by NETZSCH (Germany), with the accuracy of $(1.5$–$2)$ $\times 10^{-7}$ K$^{–1}$. Approximation dependences of coefficients of linear thermal expansion on temperature have been obtained and reference tables calculated. The data obtained are compared with data from the available literature.