Electrical Properties of ZnO-Bi2O3 Ceramics |
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Authors: | WILLIAM G MORRIS |
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Affiliation: | General Electric Company, Research and Development Center, Schenectady, New York 12301 |
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Abstract: | The nonlinear volt-ampere characteristics and small-signal ac capacitance and resistance of sintered ZnO containing 0.5 mol% Bi2O3 were measured. Many of the electrical properties are related directly to the microstructure, which consists of conductive ZnO grains separated by a continuous amorphous Bl2O3, phase. The origin of the nonlinear conduction in the intergranular phase was confirmed by experiments with evaporated thin films. The proposed conduction mechanism in varistors containing ZnO and Bi2O3 is a combination of hopping and tunneling in the amorphous phase. |
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