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Analysis of High-Voltage ZnO Varistor Prepared from a Novel Chemically Aided Method

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Abstract:

High-voltage varistor materials were prepared using an ultrafine additives precursor obtained from the precipitation method. Microstructural and electrical studies showed that the sample exhibited a smaller average grain size (d=4.5 m) and a considerably higher breakdown voltage (Eb=1610±30 V/mm) as compared with the conventional one (d=6.5 m, Eb=400±30 V/mm). The high voltage is attributed to the improvement in microstructure homogeneity and the formation of more active grain boundaries per unit volume. This novel route may explore the commercial possibility of device miniaturization.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2010.03865.x

Affiliations: 1: Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China 2: National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China

Publication date: September 1, 2010

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