A.V. Smirnov - Assistant, Saratov State University named after N.G. Chernyshevsky E-mail: methril@yandex.ru I.A. Borodina - Ph. D. (Phys.-Math.), Senior Research Scientist, Laboratory of Physical Acoustics, Saratov branch of Kotel\'nikov IRE of RAS E-mail: borodinaia@yandex.ru B.D. Zaitsev - Dr. Sc. (Phys.-Math.), Professor, Head of Laboratory of Physical Acoustics, Saratov branch of Kotel\'nikov IRE of RAS E-mail: zai-boris@yandex.ru I.E. Kuznetsova - Dr. Sc. (Phys.-Math.), Associate Professor, Leading Research Scientist, Laboratory of Electronic Processes in Semiconductor Devices, Kotel\'nikov IRE of RAS (Moscow) E-mail: kuziren@yandex.ru I.V. Sinev - Ph. D. (Phys.-Math.), Associate Professor, Saratov State University named after N.G. Chernyshevsky E-mail: sineviv@gmail.com A.A. Teplykh - Ph. D. (Phys.-Math.), Senior Research Scientist, Laboratory of Physical Acoustics, Saratov branch of Kotel\'nikov IRE of RAS E-mail: teplykhaa@mail.ru V.V. Kisin - Dr. Sc. (Eng.), Professor, Saratov State University named after N.G. Chernyshevsky E-mail: kisin@sgu.ru

In the solid ultrasound transducers and piezoelectric sensors the metal-polymer composite layer covering the plate surface are tradi-tionally used. The methods of producing such layers providing their necessary geometric and acoustic characteristics are still developed. The methods providing the technological compatibility of the developed covers with the concrete design of the enhanced devises are also developed. The active and reactive parts of the acoustic impedance are mutually connected due to the technological reasons but not on the physical or chemical ones. Thus the development of the piezoelectric devices has the technological restrictions concerning the device design. This is cause to restrictions on their high characteristics. This paper presents a method of forming a metal-polymer composite material, designed to cover parts of the surface of the ultrasonic transducers and piezoelectric resonators. The process of creating of the damping covers consists of three stages. On the first stage the tungsten particles is embedded into the polystirol shells. On the second stage the dusts of the encapsulated particles mixed in aspect ratio 1 part with size 20 micron to 4 parts with size 0.9 micron. Then the mixture polystirol in CCl4 is added. The obtained mixture placed on the substrate through the mask by using brush. On the third stage the substrate with the loading placed into the mechanic press and strained with the simultaneous heating. Thus it was shown that the use of prepared composite as a damping layer piezoelectric resonators leads to suppression of parasitic oscillations and significantly improve the quality of resonance.

 

1. Grewe M.G., Gururaja T.R., Shrout T.R., Newnham R.E. Acoustic properties of particle/polymer composites for ultrasonic transducer backing applications // IEEE Trans Ultrasonic Ferroelectric Frequency Control. 1990. 37(6). 506-14.
2. Wang H., Ritter T., Cao W., Shung K. High frequency properties of passive materials for ultrasonic transducers // IEEE Transactions on ultrasonics, ferroelectrics, and frequency control. 2001. V. 48. № 1.
3. Zajjcev B.D., Kuznecova I.E., SHikhabudinov A.M., Vasilev A.A. Novyjj sposob podavlenija parazitnykh mod v pezoehlektricheskom rezonatore s poperechnym ehlektricheskim polem // PZHTF. 2011. T. 37. № 11. S. 27−34.
4. Smirnov A.V., Sinjov I.V., SHikhabudinov A.M Akusticheskie svojjstva kompozita 0-3 na osnove volframa i polistirola // ZHurnal radioehlektroniki. № 12. 2012. S. 13.
5. Akdogan E.K., Allahverdi M., Safari A. Piezoelectric Composites for Sensor and Actuator Applications // IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 2005. V. 52. № 5. P. 746−775.
6. Paul K., Raimo S., Martikainen J., Magnus C. Techniques for joining dissimilar materials: metals and polymers // Rev. Adv. Mater. Sci. 2014. 36. P. 152−164.