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首页> 外文期刊>Materials Science and Engineering. B, Solid-State Materials for Advanced Technology >Improvement in the nonlinear electrical characteristics of SnO_2 ceramic varistors with Dy_2O_3 additive
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Improvement in the nonlinear electrical characteristics of SnO_2 ceramic varistors with Dy_2O_3 additive

机译：添加Dy_2O_3添加剂改善SnO_2陶瓷压敏电阻的非线性电特性。

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摘要

The effects of Dy_2O_3 on the microstructure and electrical properties of the SnO_2 based varistor system were investigated. It was found that Dy_2O_3 significantly affects the grain size and electrical properties of the SnO_2-based varistors. The sample with 1.00 mol% Dy_2O_3 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 Dy_2O_3 concentration is given. The reason why the varistor sample has the excellent nonlinearity is explained.
机译：研究了Dy_2O_3对基于SnO_2的压敏电阻系统的微观结构和电性能的影响。发现Dy_2O_3显着影响SnO_2基压敏电阻的晶粒尺寸和电性能。在所有样品中，具有1.00 mol％Dy_2O_3的样品具有最佳的非线性电性能和最高的非线性系数（α= 26.3）。通过SEM，TEM和EDS图像，发现在晶界偏析，这是晶界的“ p型特征”。给出了随着Dy_2O_3浓度的增加晶粒尺寸减小的原因。说明了压敏电阻样品具有优异的非线性的原因。

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