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nature : barium titanate (BaTiO3) or its solid solution mainly composed of ceramic materials. Pure barium titanate ceramics Curie temperature of approximately 120 ° C, a higher dielectric constant. But the temperature coefficient of poor, often to the introduction of additives. If artificial polarization, the electromechanical coupling coefficient is 0.36, mechanical quality factor of up to 360, piezoelectric constant d31 and d33 about 80 × 10-12C / N and 190 × 10-12C / N. The main raw material for barium carbonate and titanium dioxide. The first is usually about 1,200 ° C Synthesis barium titanate, coupled with the modified oxides, milling, molding after the 1400 ° Cderived temperature sintering. For capacitor dielectric material and produce various piezoelectric devices.
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