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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 646 pages |
| ISBN: | 978-0-9879917-6-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Preparation And Property Of Metallic Magnetic Functional Fluid Dispersing Low Concentration Of Iron Alloy Particles
Toyohisa Fujita1;1THE UNIVERSITY OF TOKYO, Tokyo, Japan;
Type of Paper: Invite
Id Paper: 485
Topic: 9
Abstract:
The preparation and property of liquid gallium based temperature sensitive functional fluid dispersing silica-coated FeMB (M = Nb, V) nanoparticles were discussed. The composition, morphology and magnetization of FeMB nanocrystalline prepared by chemical method were investigated. The nanoparticles were in the size range of 30 - 50 nm and the 0.74T saturation magnetization at 293K. A shell of SiO2 that was a thickness of about 10 nm on particles was observed by coating of tetraethyl orthosilicate (TEOS). The magnetization of the synthesized particles and fluid shows a temperature dependency within the testing temperature range of 293 - 353 K, which indicated their application potential in energy exchange devices. Silica coated iron alloy particles were dispersed into liquid gallium in the solid fraction of 0.3 mass %. The prepared fluid magnetically responded on temperature and was well heat convection fluid. The movement of gallium based fluid under the influence of the magnetic field with a magnetic field gradient was observed at various temperatures. The velocity of fluid flows in the pipe at 318K of heater temperature was at about 10mm/s and the Reynolds number was estimated as a laminar flow.