B. Loncar—contributing editor
Impulse Aging Behavior Against of Zn–Pr–Co–Cr–Dy Varistors with Cobalt Addition
Article first published online: 10 JAN 2011
© 2011 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 2, pages 328–331, February 2011
How to Cite
Nahm, C.-W. (2011), Impulse Aging Behavior Against of Zn–Pr–Co–Cr–Dy Varistors with Cobalt Addition. Journal of the American Ceramic Society, 94: 328–331. doi: 10.1111/j.1551-2916.2010.04283.x
- Issue published online: 7 FEB 2011
- Article first published online: 10 JAN 2011
- Manuscript No. 28269. Received July 8, 2010; approved October 25, 2010.
The CoO-doping effect on impulse aging behavior of the Zn–Pr–Co–Cr–Dy varistors was investigated in the range of 0.5–2.0 mol%. The clamp voltage ratio (K) increased with increasing CoO content. The varistors doped with 0.5 mol% CoO exhibited the best clamping characteristics, which the K value is 2.05–2.53 at an impulse current of 400–1200 A. The best stability was obtained from the varistor doped with 1.0 mol% CoO, with, %Δα=−4.4%, and %ΔJL=−2.3% after applying the impulse stress of 1200 A.