Abstract
(Sr 1 m x Ca x )Bi 2 Ta 2 O 9 ceramics with compositions x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0 have been synthesized by conventional solid state route. Structural analysis of pellets were investigated using x-ray diffraction and micro-Raman spectroscopy. Substitution of Ca ion at Sr site was confirmed by decrease in lattice parameter calculated from x-ray diffraction data. Lowest Raman modes at 28.7 and 58 cm m 1 were found to increase in frequency with increasing Ca concentration and this was attributed to the lower mass and lower ionic radii of Ca. The temperature variation Raman studies showed a softening of the lowest phonon mode with increasing temperature. The increase in transition temperature with concentration of Ca in SBT compounds may be due to the decrease in tolerance factor.
Sign-in/Register to access full text options 
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 callDisclaimer: 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.
