Lead-Free Sodium Potassium Niobate-Based Multilayer Structures for Ultrasound Transducer Applications.

Thick films with nominal composition (K.Na.).

Acoustic Properties of Porous Lead Zirconate Titanate Backing for Ultrasonic Transducers.

For transducer design, it is essential to know the acoustic properties of the materials in their operating conditions. At frequencies over 15 MHz, standard methods are not well adapted because layers are very thin and backings have very high attenuation. In this article, we report on an original method for measuring the acoustic properties in the 15-25 MHz frequency range, corresponding to typical skin-imaging applications, using a backing/piezoelectric multilayer structure.