Pyroelectric ceramic material and preparation method thereof

The invention discloses a pyroelectric ceramic material and a preparation method thereof, the chemical composition of the pyroelectric ceramic material is (Pb < 1-x-y > Bi < x > Sry) (Mn < 1/3 > Ta < 2/3 >) z (Zr < 0.91 > Ti < 0.09 >) < 1-z > O < 3 + phi (at)% A, x is greater than or equal to 0 and less than or equal to 0.05, y is greater than or equal to 0 and less than or equal to 0.05, z is greater than or equal to 0.01 and less than or equal to 0.1, phi is greater than or equal to 0.1 and less than or equal to 3, and A is at least one of B2O3, Cr2O3, Bi2O3, ZnO, CuO, MgO, MnO2 and Al2O3. According to the invention, the Bi element and the Sr element are doped to replace the A site in a PZT lattice, and the Mn element and the Ta element are doped to replace the B site in the PZT lattice, so that the pyroelectric coefficient of the PZT material is improved, the dielectric constant of the PZT material is reduced, the sintering quality of the material is improved, and the compactness of the material is improve