TY - JOUR
T1 - Growth and high temperature properties of Ca3Ta(Al0.9Ga0.1)3Si2O14crystals with ordered langasite structure
AU - Xiong, Kainan
AU - Zheng, Yanqing
AU - Tu, Xiaoniu
AU - Zhang, Shujun
AU - Kong, Haikuan
AU - Shi, Erwei
N1 - Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - A bulk of single crystals Ca3Ta(Al0.9Ga0.1)3Si2O14(CTAGS) with ordered langasite structure in which 90% of gallium was replaced by aluminum was successfully grown by the Czochralski technique. X-ray power diffraction (XRPD) studies confirm that the CTAGS crystals possess a langasite structure. The lattice parameters are a=8.053 Å, c=4.938 Å, and V=277.36 Å3. High resolution X-ray diffraction (HRXRD) analysis demonstrates that CTAGS single crystals are free of low-angle boundaries. The piezoelectric coefficient d11, dielectric constant ε11/ε0, dielectric loss electromechanical coupling factor k12, mechanical quality factor Q and electric resistivity of X-cut plate of CTAGS were measured from room temperature up to 900 °C. d11, ε11/ε0and s11E were found to increase from 3.99 pC/N to 5.67 pC/N, from 13.7 to 15.4 and from 7.92 pm2/N to 8.87 pm2/N, respectively. In addition, the as-growth crystal is transparent in the wavelength range of 300-3200 nm and the highest transmittance exceeds 90%.
AB - A bulk of single crystals Ca3Ta(Al0.9Ga0.1)3Si2O14(CTAGS) with ordered langasite structure in which 90% of gallium was replaced by aluminum was successfully grown by the Czochralski technique. X-ray power diffraction (XRPD) studies confirm that the CTAGS crystals possess a langasite structure. The lattice parameters are a=8.053 Å, c=4.938 Å, and V=277.36 Å3. High resolution X-ray diffraction (HRXRD) analysis demonstrates that CTAGS single crystals are free of low-angle boundaries. The piezoelectric coefficient d11, dielectric constant ε11/ε0, dielectric loss electromechanical coupling factor k12, mechanical quality factor Q and electric resistivity of X-cut plate of CTAGS were measured from room temperature up to 900 °C. d11, ε11/ε0and s11E were found to increase from 3.99 pC/N to 5.67 pC/N, from 13.7 to 15.4 and from 7.92 pm2/N to 8.87 pm2/N, respectively. In addition, the as-growth crystal is transparent in the wavelength range of 300-3200 nm and the highest transmittance exceeds 90%.
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U2 - 10.1016/j.jcrysgro.2013.12.058
DO - 10.1016/j.jcrysgro.2013.12.058
M3 - Article
AN - SCOPUS:84906965800
SN - 0022-0248
VL - 401
SP - 820
EP - 823
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
ER -