Impulse Aging Behavior Against of Zn–Pr–Co–Cr–Dy Varistors with Cobalt Addition | Zendy

Nahm ChoonW. | Zendy

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Impulse Aging Behavior Against of Zn–Pr–Co–Cr–Dy Varistors with Cobalt Addition

Author(s) -

Nahm ChoonW.

Publication year - 2011

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/j.1551-2916.2010.04283.x

Subject(s) - varistor , materials science , doping , impulse (physics) , cobalt , analytical chemistry (journal) , clamping , zinc , voltage , metallurgy , chemistry , electrical engineering , optoelectronics , physics , mechanical engineering , chromatography , quantum mechanics , engineering

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 %Δ J L =−2.3% after applying the impulse stress of 1200 A.

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