Speaker
Ms
Lalita Tawee
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
Description
In this research, The $(1-x)$BaZr${}_{0.25}$Ti${}_{0.75}$O${}_3$-$x$Sr Fe${}_{0.5}$Nb${}_{0.5}$O${}_3$ ($(1-x)$ BZT+ $x$ SFN) with 0 ≥$x$ ≥0.9 ($x$ = 0.0$-$0.9) mol% were prepare by solid-state method. The powder were calcined at 1250 ${}^{\circ}$C for 3 h and 1300 ${}^{\circ}$C various dwell times ( 3, 6, and 12 h) and then sintered at 1450 ${}^{\circ}$C for 4 h. Effect of calcination temperature on the physical properties of $(1-x)$ BZT+ $x$ SFN lead-free ceramic was investigated. Phase formation, microstructure, and dielectric properties were investigated. The ceramics of $x$=0.7 exhibited a perovskite structure with cubic symmetry. Furthermore, the ceramics exhibited a dielectric relaxation like behavior with high dielectric constant over a wide temperature rang. The impedance measurements indicated that bulk and grain boundary resistance of BZT ceramics had a strong effect on the dielectric behavior.
Author
Ms
Lalita Tawee
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
Co-author
Prof.
Gubwute Rujijanagul
(Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, THAILAND 50200)
