Nonlinear Electrical Properties of Zinc Oxide Ceramics with B_2O_3 Additions

摘要

The effect of B_2O_3 additions on the I-V behavior of ZnO-based ceramics (ZnO-Bi_2O_3-Co_3O_4-MnO_2-NiO-TiO_2) and its change sin response to an applied dc current was studied. The introduction of B_2O_3 was shown to reduce shrinkage during sintering and raise the nonlinearity factor and the voltage drop across the sample at a fixed current density. The effect of B_2O_3 on the stability of I-V behavior depends on the temperature at which the electrical contacts were formed.