Dielectric and Piezoelectric Properties of lead free ferroelectric (Ba0.9Ca0.1)(Ti1-xSnx)O3(x=0.06, 0.08,0.1) Ceramics

Abstract

In the present project, (Ba0.9Ca0.1)(Ti1-xSnx)O3(x=0.06, 0.08 and 0.1) lead-free ceramics were synthesized by conventional solid state route. XRD analysis of calcined sample shows formation of perovskite phase. The BZT- BCT ceramic samples were calcined and sintered at lower temperatures 1300oC and 1350oC, respectively which was lower compared to the previous reported literature. The average particle size was found to be 0.5-1μm from FESEM analysis. Dielectric measurements of the sintered sample were carried out for the compositions over the frequency range of 42 Hz -1MHz and temperature range from 28oC to 100oC. Each sample showed a maximum dielectric constant at the Curie temperature (TC). With increase in the value of ‗x‘ from 0.06 to 0.1 the composition had shown decrease in the Curie temperature values which were 85oC, 40oC and 30oC respectively. The dielectric and piezoelectric properties of our sintered samples are comparable to those of conventionally prepared (Ba0.9Ca0.1)(Ti1-xSnx)O3 ceramics reported earlier. These ceramics are potential candidates for the lead-free piezoelectric applications.