| abstract |
An ultrasonic transducer (110) for use in a fluid medium, comprising at least one piezoelectric transducer element (112) and at least one matching body (116) for promoting vibration coupling between the piezoelectric transducer element (112) and the fluid medium, further comprising at least one between the piezoelectric transducer element (112) and the matching body (116) introduced compensation body (118) for reducing thermal stresses, wherein the compensation body (118) has a coefficient of thermal expansion (CTE intermediate ), which between a coefficient of thermal expansion (CTE piezo ) of the piezoelectric transducer element (112) and a thermal expansion coefficient (CTE fitting ) of the matching body (116), wherein the compensation body (118) consists of at least one homogeneous and / or macroscopic at least largely isotropic material. |