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The effect of coupling agent on the microwave properties of the melt‐spun iron/earth nanocomposites
Author(s) -
Guozhi Xie,
Ping Wang,
Liukui Yuan,
Baoshan Zhang,
Pinghua Lin,
Huaixian Lu
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30831
Subject(s) - materials science , coupling (piping) , dispersion (optics) , composite material , microstructure , microwave , reflection loss , nanocomposite , morphology (biology) , chemical engineering , optics , composite number , physics , quantum mechanics , biology , genetics , engineering
The effects of silane coupling agent doping on the microstructure and microwave properties of melt‐spun Nd‐Fe‐Co alloys were investigated. All as‐milled powders, with or without silane coupling agent treatment, were characterized as flake‐like shape. However, it is found that with the addition of 0.25 mL coupling agent, the as‐milled Nd‐Fe‐Co powders can deagglomerate and become more uniform dispersion with smaller thickness. In contrast, the excessive addition of coupling agent led to somewhat higher thickness of the flakes and much more amount of coupling agent on the surface of powder. The electromagnetic properties show that the Reflection loss will arrive −27.1 dB at 4.2 GHz, for the addition of 0.25 mL coupling agent powders. The probably reasons for this are discussed on the basis of the morphology of the powders, uniform dispersion and the physical coating between the polymer and coupling agent. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009