电子元件与材料2001，Vol.20Issue(1)：25-29,5.
低温烧结铁氧体粉料的最新进展
Study on the electrical properties of the grain boundary of ZnO varistor
张药西1
作者信息
- 1. 国家磁性材料工程技术研究中心,;Department of Electronic Science Technology,;Department of Electronic Science Technology,
- 折叠
摘要
Abstract
Relations between capacitance and voltage, dielectric and dissipation properties of low breakdown voltage ZnO varistors are studied by using HP41912A low frequency impedance analysis meter. The effects of dopants on electrical properties of ZnO grain-boundary are analyzed. The mechanism of the effect of heat treatment on the electrical properties of ZnO grain-boundary is discussed. It is concluded that the donor concentration remains nearly the same while barrier height, density of states at the interface and depletion width increase when the concentration of doped Na+ increases. When samples annealed in air atmosphere, donor concentration and barrier height drops while donor concentration remains unchanged; and when samples are annealed in argon gas, barrier height drops more than in air. In the range of 105～106 Hz, εr decreases sharply and dissipation factor reaches to its peak. The peak possesses typical broadened Debye relaxation Peak characteristics.(8 refs.)关键词
叠层型片式电感器/叠层型片式磁珠/叠层型铁氧体组合元件/低温烧结铁氧体分类
信息技术与安全科学引用本文复制引用
张药西..低温烧结铁氧体粉料的最新进展[J].电子元件与材料,2001,20(1):25-29,5.
