Electrical characteristics and pulse degradation of ZnO varistors with Nb2O5 dopant
- 32 Downloads
The influence of Nb2O5 doping and pre-sintering of Nb2O5 with ZnO on electrical and pulse degradation characteristics of ZnO varistors has been investigated. Doping with a small amount of Nb2O5 worsened the electrical and pulse degradation characteristics. However, with 0.05–0.1 mol% Nb2O5, the electrical and pulse degradation characteristics were greatly improved, but further doping with Nb2O5 had little influence. Pre-sintering of Nb2O5 with ZnO at 1000–1100 °C greatly improved the electrical and pulse degradation characteristics.
KeywordsPolymer Material Processing Nb2O5 Electrical Characteristic Degradation Characteristic
Unable to display preview. Download preview PDF.
- 1.L. M. Levinson and H. R. Philipp, Am. Ceram. Soc. Bull. 65 (1986) 639.Google Scholar
- 2.T. K. Gupta, “Tailoring multiphase and composite ceramics”, (Plenum Press, New York. 1986).Google Scholar
- 6.G. D. Mahan, “Grain boundaries in semiconductors”, (Elsevier, New York, 1982) p. 333.Google Scholar
- 11.T. K. Gupta, J. Mater. Sci. 20 (1985) 348.Google Scholar