Surface electro-elastic Love waves in a layered structure with a piezoelectric substrate and a dielectric layer

Danoyan, Z.N.; Piliposian, G.T.

doi:10.1016/j.ijsolstr.2007.01.030

Cited by 47 publications

(41 citation statements)

References 12 publications

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“…A method of a spherical acoustic transducer that consists of a piezoelectric sphere substrate and an elastic coating is presented by Georgea and Ebenezer. 31 Danoyan and Piliposian 32 have discussed the existence and behavior of electro-elastic Love waves in a piezoelectric substrate with dielectric coating. Feng and Li 33 pointed out that surface electro-elastic SH waves can also propagate in the dielectric-piezoelectric structures.…”

Section: Introductionmentioning

confidence: 99%

Study on the interactions between the coatings of electric conductor or dielectric media and piezoelectric substrate in the piezoelectric functional devices

2017

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Because that most of piezoelectric functional devices are combined with the coatings of electric conductor or dielectric media and the piezoelectric substrate, the study on the interactions between them is valuable for their advanced design. In this paper, a method for the electro-mechanical coupling fields in these piezoelectric functional devices is presented. Firstly, the two-dimensional Green’s function for a normal line force or line charge is derived. Then, based on the obtained Green’s function, the interaction mechanism between the coatings of electric conductor or dielectric media and the piezoelectric substrate is studied. Finally, the electro-mechanical coupling fields under arbitrary loads are obtained by superposition principle and Gauss integration. Numerical results show that this method has high computational precision, efficiency and stability. And it can be used to improve the reliability and working performance of the piezoelectric functional device effectively.

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Section: Introductionmentioning

confidence: 99%

Study on the interactions between the coatings of electric conductor or dielectric media and piezoelectric substrate in the piezoelectric functional devices

2017

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“…According to the material properties and stacking sequence of the layer and the substrate, the layer/substrate layered structures considered in the literature can be classified into three forms, i.e. elastic layer/piezoelectric substrate, [6][7][8][9][10][11][12][13][14][15][16] piezoelectric layer/elastic substrate [17][18][19][20][21][22][23][24] and piezoelectric layer/piezoelectric substrate. [25][26][27][28][29][30] In the aforementioned works, most of the piezoelectric materials belong to the crystals of class 6 mm (including the piezoelectric ceramics).…”

Section: Introductionmentioning

confidence: 99%

“…6-9,17- showed that the cut angle of the substrate have a substantial influence on the dispersion properties. Danoyan and Piliposian 13 carried out the rigorous analysis for the existence of Love waves in a piezoelectric substrate of crystal class 6, 4, 6mm, 4mm, 622 or 422 with a soft dielectric layer. Subsequently, they 14 further examined the existence of Love wave in a layered medium composed of a hard dielectric layer on a piezoelectric half-space with 6, 4, 6mm or 4mm symmetries.…”

Section: Introductionmentioning

confidence: 99%

Propagation characteristics of SH wave in an mm2 piezoelectric layer on an elastic substrate

2015

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We investigate the propagation characteristics of shear horizontal (SH) waves in a structure consisting of an elastic substrate and an mm2 piezoelectric layer with different cut orientations. The dispersion equations are derived for electrically open and shorted conditions on the free surface of the piezoelectric layer. The phase velocity and electromechanical coupling coefficient are calculated for a layered structure with a KNbO3 layer perfectly bonded to a diamond substrate. The dispersion curves for the electrically shorted boundary condition indicate that for a given cut orientation, the phase velocity of the first mode approaches the B-G wave velocity of the KNbO3 layer, while the phase velocities of the higher modes tend towards the limit velocity of the KNbO3 layer. For the electrically open boundary condition, the asymptotic phase velocities of all modes are the limit velocity of the KNbO3 layer. In addition, it is found that the electromechanical coupling coefficient strongly depends on the cut orientation of the KNbO3 crystal. The obtained results are useful in device applications.

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“…To achieve high performance, many such devices adopt layered piezoelectric structures consisting of a piezoelectric layer and an elastic substrate or an elastic layer and a piezoelectric substrate. Much research work has been done on the propagation of the transverse surface waves in such layered structures [2][3][4][5][6][7][8][9]. Due to the intrinsic brittle property of ceramic materials and the thermal mismatch between layer and substrate, however, initial stresses appear inevitably in such layered structures during the manufacture process and have significant effects on the propagation behavior of the transverse surface waves [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effects of covering layer thickness on Love waves in functionally graded piezoelectric substrates

2011

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An analytical approach is used to investigate the effects of covering layer thickness on the propagation behavior of Love waves in functionally graded piezoelectric materials (FGPMs) covered with a dielectric layer. The piezoelectric substrate is polarized in the direction perpendicular to the wave propagation plane, and its material parameters change continuously along the thickness direction. The dispersion equations for the existence of Love waves with respect to phase velocity are obtained for electrically open and shorted cases, respectively. A detailed investigation of the effects of the covering dielectric layer thickness on dispersion curve, phase velocity, group velocity, and electromechanical coupling factor is carried out. Numerical results show that for a given FGPM, the covering dielectric layer thickness affects significantly the fundamental mode of Love waves but has only negligible effects on the high-order modes. The changes in phase velocity, group velocity, and electromechanical coupling factor due to the change of gradient coefficient of FGPMs could be approached approximately by changing the thickness of the covering dielectric layer, which imply a potential factor for designing new-type surface wave devices with FGPMs.

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Surface electro-elastic Love waves in a layered structure with a piezoelectric substrate and a dielectric layer

Cited by 47 publications

References 12 publications

Study on the interactions between the coatings of electric conductor or dielectric media and piezoelectric substrate in the piezoelectric functional devices

Study on the interactions between the coatings of electric conductor or dielectric media and piezoelectric substrate in the piezoelectric functional devices

Propagation characteristics of SH wave in an mm2 piezoelectric layer on an elastic substrate

Effects of covering layer thickness on Love waves in functionally graded piezoelectric substrates

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