Calcium barium zirconate titanate base piezoceramics and preparation method thereof

The invention discloses calcium barium zirconate titanate base piezoceramics and a preparation method thereof. The chemical formula of the calcium barium zirconate titanate base piezoceramics is (1-x-y)BaTiO3-xCaTiO3-yBaZrO3, wherein x is greater than 0 and smaller than 0.5, y is greater than 0 and smaller than 0.5, and both x and y are molar fractions. The preparation method comprises the following steps: mixing barium carbonate, calcium carbonate, titanium dioxide and zirconium dioxide according to the stoichiometric proportion (1-x-y)BaTiO3-xCaTiO3-yBaZrO3 (x is greater than 0 and smaller than 0.5, y is greater than 0 and smaller than 0.5, and both x and y are molar fractions), ball-milling, calcining, ball-milling for the second time, granulating, moulding, removing the binder, high-temperature sintering and the like so as to finally prepare the calcium barium zirconate titanate base piezoceramics with high piezoelectric performance. The method greatly enhances the piezoelectric performance of the lead-free piezoceramic system and the technical stability of the material, so that the lead-free piezoceramics in the barium titanate system achieve the practical level in the aspectsof components and technique.