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The peculiarities of energy characteristics of acoustic waves in piezoelectric materials and structures

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3 Author(s)
Zaitsev, B.D. ; Inst. of Radio Eng. & Electron., Russian Acad. of Sci., Saratov ; Teplykh, A.A. ; Kuznetsova, I.E.

This paper is devoted to detailed theoretical investigation of energy density and power flow of homogeneous (bulk) and inhomogeneous (surface and plate) plane acoustic waves in piezoelectric materials and structures. The analysis of these waves in different materials of various crystallographic orientations allowed us to establish some energy regularities. These regularities are the same for instantaneous energy characteristics of homogeneous waves and for time-average energy characteristics on unit of aperture of inhomogeneous waves if the electrical energy and power flow in vacuum are taken into account. It has been shown that, for strong piezoactive waves, the electric energy density may exceed the mechanical energy density more than three times

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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:54 ,  Issue: 3 )