Comparison of DC-bias superposition characteristics of low-temperature-fired NiCuZn and MgCuZn ferrites with low Bi2O3 doping mode
Comparison of DC-bias superposition characteristics of low-temperature-fired NiCuZn and MgCuZn ferrites with low Bi2O3 doping mode
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DOI：
10.1007/s10854-019-02469-5
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Peng Wang;Yuanxun Li;Y. Jing;Zhiqiang Xu;Xiaoli Tang
中科院分区：
文献类型：
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作者：
Peng Wang;Yuanxun Li;Y. Jing;Zhiqiang Xu;Xiaoli Tang
低温烧制MgCuZn（Mg0.3+XCu0.2Zn0.5−XFe1.98O4:X= 0, 0.02, 0.04, 0.06, 0.08, 0.1）和NiCuZn（Ni0.3+YCu0.2Zn0.5−YFe1.98O4:Y= 0, 0.02，采用常规固相反应方法制备了低Bi2O3掺杂模式下的0.04、0.06、0.08、0.1)铁氧体。比较了它们的磁性能，特别是直流偏置叠加特性。使用0.3 wt% Bi2O3作为烧结助剂，在相同Zn含量下，与MgCuZn铁氧体相比，NiCuZn铁氧体可以获得更高的磁导率。然而，当获得相同的磁导率时，MgCuZn铁氧体表现出比NiCuZn铁氧体更好的直流偏置叠加特性。 Hc(矫顽力)的增加有利于促进直流偏置叠加特性。出于同样的原因，当磁导率降低到30%以下时，MgCuZn铁氧体的增量磁导率比NiCuZn铁氧体缓慢降低。然而，当施加的直流偏压叠加变大时，NiCuZn的增量磁导率下降速度慢于MgCuZn，这主要归因于前者比后者具有更高的Bs（饱和磁通密度）。讨论了促成上述结果的可能机制。
Low-temperature-fired MgCuZn (Mg0.3+XCu0.2Zn0.5−XFe1.98O4:X= 0, 0.02, 0.04, 0.06, 0.08, 0.1) and NiCuZn (Ni0.3+YCu0.2Zn0.5−YFe1.98O4:Y= 0, 0.02, 0.04, 0.06, 0.08, 0.1) ferrites under low Bi2O3doping mode were prepared by the conventional solid-state reaction method. Their magnetic properties, especially DC-bias superposition characteristics, were compared. With 0.3 wt% Bi2O3as sintering aid, the NiCuZn ferrites could obtain higher permeabilities compared with the MgCuZn ferrites under the same Zn content. However, when the same permeabilities were obtained, the MgCuZn ferrites presented better DC-bias superposition characteristics than the NiCuZn ferrites. The increase inHc(coercivity) was beneficial to promote DC-bias superposition characteristics. For the same reason, the incremental permeability of the MgCuZn ferrites decreased slowly than that of the NiCuZn ferrites when the permeabilities decreased below 30%. However, when the applied DC-bias superposition became larger, the incremental permeability of NiCuZn decreased slower than that of MgCuZn, which was mainly attributed to the former’s higherBs(saturation flux density) compared with the latter. Possible mechanisms contributing to the above results were discussed.