Ultrasonic probe

摘要

An ultrasonic probe includes a resonator made of a piezoelectric ceramic material which is obtained by subjecting a ceramic composition containing 44.7 to 46.3 mol % of PbO, 50.9 to 51.7 mol % of TiO2, 1.8 to 2.7 mol % of Sm2O3 and 0.5 to 1.0 mol % of MnO2 to poling treatment in such a manner that the ceramic composition is applied with an electric field of 60 to 80 kV/cm at a temperature of 130 DEG to 160 DEG C.