| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1532037 | Materials Science and Engineering: B | 2006 | 5 Pages |
Abstract
The effects of Dy2O3 on the microstructure and electrical properties of the SnO2 based varistor system were investigated. It was found that Dy2O3 significantly affects the grain size and electrical properties of the SnO2-based varistors. The sample with 1.00 mol% Dy2O3 has the best nonlinear electrical property and the highest nonlinear coefficient (α = 26.3) among all samples. By SEM, TEM and EDS images, it was found dysprosium segregates at the grain boundary, which is responsible for “p-type characteristics” of the grain boundaries. The reason that grain size decreases with increasing Dy2O3 concentration is given. The reason why the varistor sample has the excellent nonlinearity is explained.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Chun-Ming Wang, Jin-Feng Wang, Wen-Bin Su, Hong-Cun Chen, Chun-Lei Wang, Jia-Liang Zhang, Guo-Zhong Zang, Peng Qi, Zhi-Gang Gai, Bao-Quan Ming,