Ceramic samples of calcium doped barium titanate have been prepared from highpurity
raw materials by using solid-state reaction method at a sintering temperature of
1350˚C for 3.5h. The electrical properties of ceramic samples Ba1-xCaxTiO3 have bee
n
studied for the ratios (x = 0, 0.1, 0.3, 0.5, 0.7, 1), as a function of temperature within the
range of 25˚C to 220˚C at the frequency 1kHz. Experimental results show that the Currie
point moved within the temperature range from 120˚C to 150˚C by change of calciumadded
ratios. Dielectric constant decreases by increasing the calcium-added ratios. The
maximum value of the dielectric constant rached to έ=6898.85 for barium titanate at the
temperature Tc = 132˚C. We got the high values of the tangent loss angle at both ends of
the studied temperature range. Curie constant decrease of the samples by increasing the
additional calcium ratios.
