Study on the Structure and Surface Acoustic Wave Properties of KDP and ADP Crystals

Guang Gang Zhou; Gui Wu Lu; Chong Wu; Wen Qi Huang; Hong Yang

doi:10.4028/www.scientific.net/AMR.560-561.66

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 560-561Study on the Structure and Surface Acoustic Wave...

Study on the Structure and Surface Acoustic Wave Properties of KDP and ADP Crystals

Abstract:

The geometry structure, band structure and density of states of KH2PO4 (KDP) and NH4H2PO4 (ADP) single crystals were investigated by using density functional theory (DFT) method. Parameters including the phase velocity, electromechanical coupling factor and power flow angle (PFA) were calculated for KDP and ADP at X, Y, Z cuts, respectively. Our calculated data are in good agreement with the experimental results. Compared with quartz, KDP and ADP crystals are of lower phase velocities. Considering PFA, electromechanical coupling coefficients and phase velocity, it was concluded that the propagation direction of 60 of X-cut and Y-cut possess superior SAW performance for both KDP and ADP crystals.

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Periodical:

Advanced Materials Research (Volumes 560-561)

Pages:

66-70

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.560-561.66

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Online since:

August 2012

Authors:

Guang Gang Zhou, Gui Wu Lu, Chong Wu, Wen Qi Huang, Hong Yang

Keywords:

ADP, First-Principle, KDP, Phase Velocity, Surface Acoustic Wave (SAW)

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References

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