초록
The effect of WO$_3$ addition and sintering condition on the electrical properties of SrTiO$_3$ceramic have been investigated. Resistivity and capacitance of grains and grain boundaries were obtained by applying impedance spectroscopy. From the result it could be concluded that the temperature dependance of capacitance of WO$_3$doped specimens were influenced directly by the variation of grain boundary capacitance. It was also found that the dispersion frequency increased as the degree of reduction of the specimen increased. The dispersion frequency characteristics showed discernably that the resistivity of the specimen varied with WO$_3$ content. The dielectric properties were influenced directly by the reduction of the specimens. The dielectric constant of grain boundaries of BL capacitor could be obtained by Cole-Cole plot and was influeneced by the amount of WO$_3$ added.
