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This work presents a study of the influence of both Bi content and Sb/Bi ratio on the electrical characteristics of a commercial-type ZnO varistor. In contrast to previous studies two nonlinear coefficients, the breakdown fields and energy absorption abilities were measured after sintering at 970°C or 930°C. The Bi-content was varied from 0.9 to 1.8 at% while the Sb/Bi ratio was varied from 0.8 to...
The electrical characteristics of doped ZnO pellets prepared by novel, modified citrate gel routes and the conventional mixed oxide route were compared. The mixed oxide route produced rather inhomogeneous materials at the sintering temperatures employed in this study (970 °C and 1000 °C). In contrast, the modified citrate gel routes enabled some control over the location of the minority components...
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