抄録
The effect of the addition of BaTiO3 and CaTiO3 on the electrical propertiesof the SrTiO3-based varistor have been investigated.The addition of BaTiO3 and CaTiO3, especially the addition of BaTiO3 decreased the grain size of ceramics, nonlinear coefficient (α) and varistor voltage. The capacitance equivalentto the dielectric constant of the varistor was increased by the addition of BaTiO3.
As the result, the height of Schottkey barrier decreased with the addition of BaTiO3.
We thought that the decrease of nonlinear coefficient (α) was the result of the decrease in height of Schottky barrier.
