Abstract
We report aluminium substitution effect on structure and electric properties of langasite (La3Ga5SiO14) family crystals. Quasi-congruent melting composition of La3Ga5-xAlxSiO14 (LGAS), La3Nb0.5Ga5.5-xAlxO14 (LNGA), and La3Ta0.5Ga5.5-xAlxO14 (LTGA) crystals are x = 0.9, 0.2, and 0.5, respectively. A single-crystal x-ray structure analysis reveals that Al atoms are distributed in all cation sites except for the decahedral one occupied by La, by rather favoring the smallest tetrahedral one. The electrical properties of the Al-substituted crystals are compared with those of pure ones. By Al substitution, all langasite family crystals show higher piezoelectric constant d11 and higher electric resistivity ρ. Among them, the LTGA crystal with lower temperature dependence of d11 and highest ρ is a promising material for high temperature piezoelectric application.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
