A low leakage current (Co, Mn, Ta)-SnO2 varistor tailored by doping with chromium for power grids

A low leakage current (Co, Mn, Ta)-SnO2 varistor tailored by doping with chromium for power grids

A SnO2 varistor which was prospected to be used in ultra-high voltages grids as an overvoltage protection element was developed. The SnO2 varistor was doped with Cr to improve the comprehensive electrical properties. The optimal electrical parameters are achieved when the dopant of Cr is 0.05 mol% i...

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Bibliographic Details
Main Authors: Hongfeng Zhao, Wenxin Liang, Feng Wang, Yuanxiang Zhou, Qingyun Xie
Format: Article
Language:English
Published: Elsevier 2020-09-01
Series:Results in Physics
Subjects:
SnO2 varistor
Leakage current
Barrier height
Microstructure
Online Access:http://www.sciencedirect.com/science/article/pii/S2211379720317812
Description
Summary:A SnO2 varistor which was prospected to be used in ultra-high voltages grids as an overvoltage protection element was developed. The SnO2 varistor was doped with Cr to improve the comprehensive electrical properties. The optimal electrical parameters are achieved when the dopant of Cr is 0.05 mol% in this article. The voltage gradient of the varistor with Cr 0.05 mol% dopant is 787 V/mm, the nonlinearity is 50 and the leakage current is 7.8 μA/cm2.
ISSN:2211-3797

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