Effect of Quenched Speed on Microwave Properties of the NdFeB Nanocomposites

Guo Zhi Xie; Xiao Long Song; Bao Shan Zhang; Dong Ming Tang; Jiang Wei Chen; Qing Bian; Huai Xian Lu

doi:10.4028/www.scientific.net/AMR.287-290.193

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 287-290Effect of Quenched Speed on Microwave Properties...

Effect of Quenched Speed on Microwave Properties of the NdFeB Nanocomposites

Abstract:

The effect of the quenched speed on the microstructure and electromagnetic properties of melt spun Nd3Fe₆₈Co₁₈B₁₁ nanocomposites was investigated. XRD spectra showed that only α-Fe phase can be obtained for both quenched samples. The complex permeability () and permittivity () within 2-18GHz were measured by vector network analysis. By virtue of quenched speed increased, the flake-like Nd₃Fe₆₈Co₁₈B₁₁decreased the value of permittivity while that of permeability slightly changed. According to transmission line theory, the reflection loss was calculated. With thin matching thickness of 1.5mm, The Nd₃Fe₆₈Co₁₈B₁₁ composites realized the optimum reflection loss RL=-5.3dB at 3.6GHz and RL=-3.5dB at 3.9GHz for quenched speed 30m/s and 20m/s, respectively. It showed that it is possible to obtain good microwave absorbing properties with appreciated quenched speed for as spun Nd-Fe-B nanocomposites.

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Periodical:

Advanced Materials Research (Volumes 287-290)

Pages:

193-196

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.287-290.193

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Online since:

July 2011

Authors:

Guo Zhi Xie, Xiao Long Song, Bao Shan Zhang, Dong Ming Tang, Jiang Wei Chen, Qing Bian, Huai Xian Lu

Keywords:

Absorbing, Complex Permeability, Complex Permittivity, Melt-Spun

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