The fundamental shear horizontal(SH0)waves have been proved to be a very useful method for nondestructive testing due to their non-dispersive characteristics.Currently,although several methods have been proposed to ge...The fundamental shear horizontal(SH0)waves have been proved to be a very useful method for nondestructive testing due to their non-dispersive characteristics.Currently,although several methods have been proposed to generate SH0 waves,it is still a challenge to obtain pure SH0 wave mode efficiently.Herein,in this study,non-centrosymmetric YBa3(PO_(4))3(YBP)and YbBa3(PO_(4))3(YbBP)crystals with pure face-shear mode were grown via the traditional Czochralski pulling method at temperatures above 1800℃.High resolution X-ray diffraction was carried out to evaluate the crystalline quality.Results showed that the YBP and YbBP crystals were of good quality,with the full width at half-maxima being on the order of 42.500 and 52.300,respectively.Moreover,the full set of electro-elastic constants for the YBP and YbBP crystals were determined and collated using a combination of impedance and pulse-echo methods.The piezoelectric coefficient(d14)of the YBP and YbBP crystals were determined to be 10.6 pC/N and 11.4 pC/N,respectively,corresponding to the electromechanical coupling coefficient(k14)equal to 15.4%and 15.9%,exhibiting large and pure face-shear vibration mode.Collectively,these results indicate that the YBP and YbBP crystals are promising for acoustic wave sensing application.展开更多
基金supported by the Primary Research&Development Plan of Shandong Province(2019JZZY010313)the National Natural Science Foundation of China(51872165).
文摘The fundamental shear horizontal(SH0)waves have been proved to be a very useful method for nondestructive testing due to their non-dispersive characteristics.Currently,although several methods have been proposed to generate SH0 waves,it is still a challenge to obtain pure SH0 wave mode efficiently.Herein,in this study,non-centrosymmetric YBa3(PO_(4))3(YBP)and YbBa3(PO_(4))3(YbBP)crystals with pure face-shear mode were grown via the traditional Czochralski pulling method at temperatures above 1800℃.High resolution X-ray diffraction was carried out to evaluate the crystalline quality.Results showed that the YBP and YbBP crystals were of good quality,with the full width at half-maxima being on the order of 42.500 and 52.300,respectively.Moreover,the full set of electro-elastic constants for the YBP and YbBP crystals were determined and collated using a combination of impedance and pulse-echo methods.The piezoelectric coefficient(d14)of the YBP and YbBP crystals were determined to be 10.6 pC/N and 11.4 pC/N,respectively,corresponding to the electromechanical coupling coefficient(k14)equal to 15.4%and 15.9%,exhibiting large and pure face-shear vibration mode.Collectively,these results indicate that the YBP and YbBP crystals are promising for acoustic wave sensing application.
