Influence of Microstructure on the DC-Bias-Superposition Characteristics of NiZn Ferrites
Influence of Microstructure on the DC-Bias-Superposition Characteristics of NiZn Ferrites
复制标题
微观结构对NiZn铁氧体直流偏置叠加特性的影响
DOI：
10.1109/tmag.2011.2157307
复制
发表时间：
2011-10-01
影响因子：
2.1
通讯作者：
Bai, Feiming
中科院分区：
文献类型：
--
作者：
Tang, Xiaoli;Zhang, Huaiwu;Bai, Feiming
The influence of microstructure on the magnetic properties, especially the dc-bias-superposition characteristics, of NiZn ferrites has been investigated. The value of saturation magnetic flux (B(a)) density first increased and then changed little with variation of the sintered density, and showed little relation to the microstructure. Coercivity (H(c)) decreased continuously with increasing average grain size. Delta B (B(c)-remanence) first increased with increasing average grain size, but then gradually decreased when abnormal grain growth prevailed. The incremental permeability (permeability with magnetic field superposition) was influenced by both Delta B and H(c). A sample with higher Delta B and H(c) favored the attainment of a higher incremental permeability. The Q-factor was mainly determined by the sintered density and microstructure. To sum up, a uniform and dense microstructure with relatively small average grain size is favorable for obtaining better dc-bias-superposition characteristics, including permeability and Q-factor.
