Piezoelectric ultrasonic transducer comprising a housing and an insulating layer

摘要

The piezoelectric ultrasonic transducer has a housing and a piezoelectrically active layer which is connected to the housing via an insulating layer. An adaptive layer is additionally located between the insulation layer and the housing. The coefficient of thermal expansion of the adaptive layer has a value between the values of the coefficients of thermal expansion of the housing and the insulating layer. An ultrasonic transformer of this type has a long service life even when it is used in an environment of frequent temperature fluctuations.