Thermal Expansion of (Ba1-xLax))Ti1-x/4 O 3 Solid Solutions

Deformation and the thermal expansion coefficient of ceramic samples of (Ba1−xLax)Ti1−x /4 O 3 solid solutions (x= 0, 0.026, 0.036, 0.054) were studied in the temperature range 120–700 K. Based on an analysis of the data obtained, the temperature–composition phase diagram is refined, and the temperature dependence of the polarization is calculated. The results are discussed in combination with the dielectric measurement data