Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5438811 | Ceramics International | 2017 | 4 Pages |
Abstract
Ca3Ta(Ga1-xScx)3Si2O14 (CTGSS) single crystals with various Sc concentrations (x = 0, 0.1, 0.2, 0.3, and 0.4) were grown by the micro-pulling-down method and their structure and chemical composition were evaluated. Through the powder X-ray diffraction (XRD) measurement and backscattered electron (BSE) imaging, it was demonstrated that all the CTGSS crystals with different Sc concentration were successfully grown as langasite-type structure although some secondary phases were observed for the crystals with x = 0.2, 0.3 and 0.4. Lattice parameters calculated from the powder XRD pattern generally increased with Sc substitution. Measured parameters for CTGSS crystal with x = 0.1 were larger permittivity ε11T/ε0 and lower electromechanical coupling coefficient k12 and piezoelectric constant d11 than those for CTGS crystal with x = 0. It was also suggested that piezoelectric constant |d14| became larger due to the Sc substitution.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yu Igarashi, Yuji Ohashi, Yuui Yokota, Mototaka Arakawa, Kenji Inoue, Akihiro Yamaji, Yasuhiro Shoji, Kei Kamada, Shunsuke Kurosawa, Akira Yoshikawa,