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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.52  No.3 (2011)  >  pp.572-575

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Alignment of Carbon Nanofibers in the Al2O3 Matrix under a Magnetic Field

Byung-Koog Jang1), Kaoru Tsuda2) and Yoshio Sakka1)
1) Nano Ceramics Center, National Institute for Materials Science
2) Nano Frontier Technology Co., Ltd.

A stable suspension of multi-walled carbon nanofibers (CNFs) in Al2O3 was prepared by adding ammonium polycarboxylate as a dispersant in an aqueous solution. A strong magnetic field of 12 T was applied to the CNFs/Al2O3 suspension to investigate the alignment of the CNFs. The result was that the CNFs in the matrix showed good alignment with the direction of the magnetic field. It was found that 0.5 mass% CNFs showed isolated alignment; in contrast, with 5 mass% CNFs there were mainly aligned bundles. The alignment was only seen with straight CNFs; curved CNFs showed no alignment in a magnetic field.

carbon nanofibers, alumina, alignment, magnetic field, suspension

Received: September 17, 2010
Accepted: December 08, 2010 , Published online: February 25, 2011
Copyright (c) 2011 The Japan Institute of Metals



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