Abstract
Temperature dependence of I-V characterisics was investigated in semiconducting ceramics with the compositions of SrTiO3 with three additives (MgO-TiO2-SiO2-system, Nb2O5 and ZrO2) and four additives (MgO-TiO2-SiO2-system, Nb2O5, ZrO2 and perovskite-type compound). I-V curves of some SrTiO3 ceramics with four additives did not shifted toward higher current regions in spite of increased temperature. This is possibly explained in terms of the temperature dependence of the permitivity e of SrTiO3 ceramics.
