Chongkol Tongnam, Pongthep Arkornsakul, Kamonpan Pangpat and Gobwut Rujijanagul

pp. 839 - 846

Abstract

gklanakarin J. Sci. Technol., 2005, 27(4) : 839-846
The effect of heating/cooling rate on the physical, microstructural and dielectric properties of BaTiO₃
ceramics has been studied. The heating/cooling rate using in this work is ranged from 10 to 20ºC/min at
sintering temperature of 1350ºC for 2 hours. It was found that the physical properties of the barium titanate
ceramics using heating/cooling rate of 20ºC/min gave a higher value of percent shrinkage and density than
that of 10 and 15ºC/min. From the dielectric constant measurement, the maximum dielectric constant depended
very much on the heating/cooling rates. The maximum dielectric constant of the ceramics using heating/
cooling rate of 20ºC/min was higher that that of 10 and 15ºC/min. Hence, the small grain size and high
density of the ceramics using high heating/cooling rate may have an influence on the value of maximum
dielectric properties of the BaTiO₃ ceramics.

Keywords

• BaTiO₃ ceramics
• heating/cooling rate
• dielectric constant