SnO_2-RuO_2系ガラス複合体の調整と電気的特性(<特集>セラミック材料)

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This work was undertaken to survey methods for improvement in the electrical properties of SnO_2-glass composites. Glass composites with with different particle dispersions of SnO_2 and RuO_2 in glass matrices were prepared under the various mixing conditions of starting materials. The effects of RuO_2/SnO_2 ratios and the dispersion state of both conductive particles in the glass matrices were investigated on the electrical properties of the glass composites. The resistivity and the temperature coefficient of resistance(TCR)of the glass composite decreased and increased, respectively, with increasing RuO_2 content. The glass composite with TCR close to zero was obtained at RuO_2/SnO_2=25/25(vol%). In this case, the electrical properties of the glass composites were independent of the mixing conditions of the starting materials, i.e.the particle dispersions of RuO_2 and SnO_2 in the glass matrices. On the other hand, the electrical properties of the samples with small RuO_2 or SnO_2 content largely depended on the dispersion state of both conductive particles in the glass matrices. In the glass composites with inhomogeneous particle dispersions, the contributions of miner components to the electrical properties of the glass composites were remarkable. In this case, the compensating effect between SnO_2 and RuO_2 effectively appeared on the electrical properties, and thus the glass composites showed smaller temperature dependence of resistance than that of the sample with homogeneous particle dispersions.
2000-06-15

SnO_2-RuO_2系ガラス複合体の調整と電気的特性(<特集>セラミック材料)

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