Original Article |
2005, Vol.27, No.4, pp. 839-846
Effect of heating/cooling rate on the properties of BaTiO3 ceramics
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.