硅烷改性镍锌铁氧体及其环氧复合材料的制备及磁性能研究

Yanmin Wu, Pengli Zhu, R. Sun
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引用次数: 1

摘要

研究了镍锌铁氧体/环氧复合材料作为嵌入式电感。采用化学共沉淀法制备了Ni-Zn铁氧体粉末,并用γ-缩水氧基丙基三甲氧基硅烷(KH-560)进行改性。采用粉末x射线衍射仪(XRD)和振动样品磁强计(VSM)对未改性铁氧体进行了表征。XRD曲线表明该铁氧体为典型尖晶石结构,VSM测量结果表明该铁氧体的初始磁导率约为1225.03。将改性或未改性的铁氧体与环氧树脂分别混合制备磁性环氧复合材料。改性铁氧体复合材料的分散性优于未改性铁氧体。用Agilent e4991a测量了复合材料的磁性能。结果表明:环氧复合材料的磁导率由1.4提高到2.1,铁氧体质量分数由30%提高到70%,磁损失较低;
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Preparation and magnetic properties of silane modified Ni-Zn ferrite and its epoxy composites
Ni-Zn ferrite/epoxy composites were investigated for embedded inductors. Ni-Zn ferrite power was prepared by a chemical coprecipitation method, and then modified with γ-glycidoxypropyl trimethoxysilane (KH-560). The unmodified ferrite was characterized by a powder X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The XRD curve showed that the ferrite was typical spinel structure, and the measuring result of the VSM indicated that the initial permeability of the ferrite was about 1225.03. The magnetic epoxy composites were respectively fabricated by mixing the modified or unmodified ferrite and epoxy resin. The composites made from the modified-ferrite exhibited better dispersion than that from the unmodified. Magnetic properties of composites were measured by Agilent E 4991 A. The results showed that the permeability of the epoxy composite was rising from 1.4 to 2.1 with the mass fraction of the ferrite increasing in the composite from 30% ∼ 70%, and magnetic loss was low.
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