期刊
MATERIALS & DESIGN
卷 109, 期 -, 页码 390-395出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2016.07.097
关键词
Soft magnetic composites; Aluminum oxide; Insulation coating; Sol-gel; Magnetic properties
资金
- State Key Laboratory of Powder Metallurgy
- Central South University, Changsha, China
- National Natural Science Foundation of China [51574293]
The alumina sol was obtained using Al(C3H7O)(3) as a precursor. Pure Fe particles were coated with Al2O3 using a sol-gelmethod and subsequently calcinated at 1100 degrees C. The resulting softmagnetic compositeswere investigatedwhile varying the treating temperature. Scanning electronmicroscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) analyses revealed that the surface of the Fe powder particles comprised a thin alpha-Al2O3 insulating layer uniformly distributed after calcination at 1100 degrees C for 1 h. The permeability increased with the treating temperature, reaching a stable value of 93 from675 degrees C to 725 degrees C. The hysteresis losses decreased, whereas the eddy losses increased with the treating temperature in the range of 650-725 degrees C. The core losses (P-cv) decreased (lowest value: 10.2 kW/m(3)) up to 675 degrees C and increased thereafter. The permeability of the material annealed at 675 degrees C remained stable with changes in the frequency, whereas P-cv remained low over the 5-100 kHz range. A noticeable insulation layer separating the different Fe particles was observed by SEM for the samples annealed below 700 degrees C. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据