Asokan, T and Iyengar, GNK and Nagabhushana, GR (1987) Influence of process variables on microstructure and V-I characteristics of multicomponent zinc oxide-based nonlinear resistors. In: Journal of the American Ceramic Society, 70 (9). pp. 643-650.
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Studies were made of the effect of process variables such as calcination, initial particle size, and postsintering on d., microstructure, voltage-current (V-I) characteristics, and energy-handling capability of a ZnO-based composite: 87.325 wt.% ZnO + 0.1% $Nb_2O_5$ + 3.5% $Sb_2O_3$ + 6% $Bi_2O_3$ + 0.55% $CoO$ + 0.7% $MnO_2$+ 0.9% $Cr_2O_3$ + 0.9% $NiO$ + 0.025% $Al(NO_3)_3$. The nonlinear characteristics are improved by the calcination of a $ZnO + Nb_2O_5$ mixt. at 1200\degree for 1 h. The postsintering heat treatment rejuvenates the V-I characteristics of the degraded sample to a great extent. The postsintered sample containing $Nb_2O_5$, prepared by using a calcined charge of particle size around 1 \mum, possesses better V-I characteristics and energy-handling capability compared to the samples prepared without the calcination step.
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of the American Ceramic Society |
| Publisher: | American Ceramics Society |
| Additional Information: | Copyright belongs to American Ceramics Society |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Electrical Sciences > High Voltage Engineering (merged with EE) |
| Date Deposited: | 24 Mar 2008 |
| Last Modified: | 27 Aug 2008 13:16 |
| URI: | http://eprints.iisc.ac.in/id/eprint/13429 |
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