A piezoelectric ceramic material having low dielectric constant, high thickness coupling factor, high mechanical quality factor, high stability, and high operating temperature, has been prepared fromPbTiO3incorporated with 2.5 mol% ofLaO12and 1.0 mol% ofMnO2. Typical electromechanical constants of this material are as follows: dielectric constantε11T/ε0 230, ε33T/ε0 170; coupling factork330.46,kt0.46,k150.28,kp0.07,k310.04; mechanical quality factorQ1100, Poisson's ratio σE0.20. Frequency constantsNtandN3tof the fundamental and third‐harmonic thickness vibrations have temperature coefficients of −1.1 × 10−4°C−1and −2 × 10−5°C−1, respectively. Aging rates ofNtandN3t, are +0.02% and −0.02%/time decade at 30°C, respectively. The Curie point of this material exists at 470°C, andk33andktincrease gradually with temperature up to 400°C. This material has grain size of 2–3 μ and bending strength of 2 × 107kg/m2, and can be polished into very thin plate. ThePbTiO3ceramics have a high potential for use in electromechanical devices at high frequency and high temperature.