High-permeability and high-Curie temperature NiCuZn ferrite
High-permeability and high-Curie temperature NiCuZn ferrite
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DOI：
10.1016/j.jmmm.2004.05.017
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发表时间：
2004-12
影响因子：
2.7
通讯作者：
Hua Su;Huaiwu Zhang;Xiaoli Tang;Xinyuan Xiang
中科院分区：
文献类型：
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作者：
Hua Su;Huaiwu Zhang;Xiaoli Tang;Xinyuan Xiang
高磁导率和高居里温度 NiCuZn 铁氧体专为电信应用而开发。在开发过程中，重点关注NiZn铁氧体中CuO的含量以及NiCuZn铁氧体中添加的少量MoO3添加剂。证实CuO含量为4mol%时，岩心的初始磁导率有所增加，而居里温度仅略有下降。这主要是由于铜离子的存在激活了铁氧体中的烧结过程并导致密度增加；磁晶各向异性常数的降低也有一定的贡献。通过优化MoO3添加剂，由于晶粒尺寸的增大，初始磁导率可以得到急剧增加。因此，我们能够开发出磁导率为 2480、居里温度约为 118°C 的 NiCuZn 铁氧体。
High-permeability and high-Curie temperature NiCuZn ferrite was developed for use in telecommunication. In the development process, attention was focused on the amount of CuO contained in NiZn ferrite and a small additive of MoO3added in the NiCuZn ferrite. It was confirmed that the initial permeability of the core increased and the Curie temperature only decreased a little with 4mol% CuO content. This was mainly attributed to the presence of Cu ions activating the sintering processes in ferrites and leading to increase in density; the decrease of magnetocrystalline anisotropy constant also does some contribution. By optimizing the MoO3additive, the initial permeability could get a sharp increase because of enhancement of grain size. As a result, we were able to develop the NiCuZn ferrite with a permeability of 2480 and Curie temperature of around 118°C.