20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

The Effect of Calcination Temperature on the Dielectric Properties of $(1-x)$BaZr${}_{0.25}$Ti${}_{0.75}$O${}_3$+$x$SrFe${}_{0.5}$Nb${}_{0.5}$O${}_3$ ceramics

21 May 2015, 13:00
3h 30m
Board: MNA-13
Poster presentation Material Physics, Nanoscale Physics and Nanotechnology Poster-3

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.

Primary 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)

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