Abstract:The differences of the crystal structures and powder shapes of raw BaTiO3 (BT) and calcined BT were investigated first, and then the dielectric temperature characteristics of three kinds of BT based dielectric material were studied and compared when used the two kinds of BT respectively.The results show that both the powder size and c/a value of calcined BT are increased, therefor its spontaneous polarization enhances, and the calcined BT based material's room temperature dielectric constant is bigger as well, but its curie peak falls, and leads the capacitance temperature change rate to change from negative direction. While both the powder size and c/a value of raw BT are smaller, though has lower room temperature dielectric constant, its curie peak lifts, and the capacitance temperature change rate becomes better.And the property of dielectric temperature stability is improved, which can adapt to a higher temperature of work condition.