Effects of SiO2 concentration on the DC-bias-superposition characteristics of the NiCuZn ferrites
Effects of SiO2 concentration on the DC-bias-superposition characteristics of the NiCuZn ferrites
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SiO2浓度对NiCuZn铁氧体直流偏置叠加特性的影响
DOI：
10.1007/s10854-015-2827-4
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Jing Yulan
中科院分区：
文献类型：
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作者：
Huan Li;Tang Xiaoli;Su Hua;Zhang Huaiwu;Jing Yulan
本文研究了低温烧结NiCuZn铁氧体的直流偏置叠加特性对磁元件稳定性的影响。采用传统陶瓷法制备了不同SiO2掺杂量的NiCuZn铁氧体（低磁导率组份A和高磁导率组份B）。A和B的XRD图谱均为单一尖晶石相，但平均晶粒尺寸和烧结密度随SiO2含量的增加而逐渐减小，0.35wt%SiO2掺杂的铁氧体A与0.75wt%SiO2掺杂的铁氧体B具有相似的磁导率。后者由于具有较厚的晶界和较高的介电常数而具有较好的直流偏置叠加特性。添加SiO2较多的铁氧体B在高叠加磁场下磁导率增量的下降速率较慢，表明电子器件具有更好的直流偏置叠加特性。
DC-bias superposition characteristics of low-temperature-fired NiCuZn ferrites have been investigated for the stability of magnetic components. Different amount of SiO2 doped NiCuZn ferrites (low-permeability-composition, group A and high-permeability-composition, group B) were prepared by the conventional ceramic method. All XRD patterns of A and B exhibited single spinel phase, while the average grain size and sintered density gradually decreased with increasing SiO2 content, 0.35 wt% SiO2 doped ferrite A possessed similar permeability with 0.75 wt% SiO2 doped ferrite B. The latter sample presented a better DC-bias-superposition characteristic owing to the thicker nonmagnetic grain boundary and the higher coercivity. The declining rate of incremental permeability under high superposition magnetic fields was slower for the ferrite B with more SiO2 addition, indicating a better DC-bias superposition characteristic for electronic devices.