The Preparation of Slag Fiber and Its Application in Microwave Absorption

• Published in: Journal of the Chinese Chemical Society (Taipei) Vol. 62; no. 3; pp. 243 - 248
• Main Authors: Wang, To-Mai, Ting, Tzu-Hao, Yeh, Feng-Mei
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.03.2015; WILEY‐VCH Verlag; Wiley Subscription Services, Inc
• Subjects: Fiber-blowing; Microwave absorption; Plasma melting; Scanning electron microscopy; Slag fibers; Water-quenched
• ISSN: 0009-4536; 2192-6549
• DOI: 10.1002/jccs.201400311

In this research, the slag fibers coming from water‐quenched slags by using thermal plasma technology were successfully prepared and introduced into epoxy resin to be microwave absorber. The fiber‐blowing equipment for manufacturing slag fibers through controlling the nozzle angle and vertical distance from the nozzle to the melt outlet was also studied. The spectroscopic characterization of the formation processes of slag fiber was studied by using X‐ray diffraction (XRD), inductively‐coupled plasma (ICP), differential thermal analysis (DTA) and scanning electron microscopy (SEM). Microwave absorbing properties of the slag fibers and thermal plastic resin were investigated by measuring reflection loss in the 2–18 and 18–40 GHz microwave frequency range using the free space method. It was found that the composite specimens of slag fiber and thermal plastic resin had the best microwave absorption due to the reflection losses between from −4 to −8 dB and from −11 to −17 dB at frequencies between 2–18 and 18–40 GHz. This article introduces a novel microwave absorber slag fiber‐epoxy composites. We mainly discussed application in microwave absorption in 2–18 and 18–40 GHz. It was found that the optimum thickness of the absorber needed to yield the maximum reflection loss could be obtained over a broad frequency region on the slag fiber‐epoxy composites.