Microwave Absorbing Properties of Flaky Carbonyl Iron Powder Prepared by Rod Milling Method

Autor: Jiangwei Chen, Peicheng Ji, Guozhi Xie, Ningyan Xie, Jing Chen, Jun Li
Rok vydání: 2019
Předmět:
Zdroj: Journal of Electronic Materials. 48:2495-2500
ISSN: 1543-186X
0361-5235
DOI: 10.1007/s11664-019-06986-1
Popis: The rod milling method of cylindrical-shaped milling medium was applied to prepare the flaky carbonyl iron powders with varying milling times (10 h, 15 h and 20 h). The sample obtained by the spherical milling medium was also used as a contrast. The samples were characterized by x-ray diffraction, scanning electron microscopy and Raman spectroscopy, respectively. The complex permittivity and permeability were measured by vector network analyzer in the frequency range of 1–18 GHz. The results revealed that cylinder-prepared samples have better impedance matching properties and good absorbing properties. The minimum reflection loss (RL) of − 15.7 dB was observed at 6.0 GHz with a thickness of 1.5 mm, and the effective absorption frequency (RL
Databáze: OpenAIRE
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