Abstract
The synthesis, characterisation, density and dielectric properties of Sm and Na substituted SrBi4Ti4O15 (SBT) piezoelectric ceramics are systematically studied for possible applications at high temperatures. The existing piezoceramics have temperature limitations. Samarium (Sm) and Sodium (Na) modified Strontium bismuth titanate Sr1-x SmxNaxBi4Ti4O15 (SSNBT-Strontium Samarium Sodium Bismuth Titanate) where x = 0.1, 0.2, 0.3 ceramics are prepared by solid state double sintering method using planetary ball mill for 10 hours duration in presence of Acetone media. Single phase is formed after calcination at 800 °C for 2 hours. Pellets are made with 1 cm diameter and 1 mm thickness using uniaxial Hydraulic press at 5 tonnes/cm2 pressure. All the samples are sintered at 1160 °C for 2 hours. The entire calcination and sintering processes are done in a programmable furnace. Orthorhombic structure of compound is confirmed by XRD analysis. The lattice parameters were calculated and experimental density was found to be around 95% of theoretical density. Tolerance factor decreased with increasing concentration of Sm, Na. The plate-like structure of grains is observed using SEM images and orientation of grains is random. Dielectric properties are reported as a function of temperature at different frequencies. The Curie temperature (Tc) of SBT is enhanced by substitution of Sm and Na in place of Strontium making this material a useful piezoceramic for high temperatures applications.
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.
