The Production of Stable Ferromagnetic Liquids for Energy Conversion.
Annual rept. no. 1, May 77-Nov 78,
UNIVERSITY COLL OF NORTH WALES BANGOR SCHOOL OF PHYSICAL AND MOLECULAR SCIENCES
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The aim of this research work has been to characterise the properties of suspensions of small single domain iron particles in mercury. These suspensions, or ferromagnetic liquids, have been stabilised against diffusional growth by tin and sodium additives. That the tin and sodium associate themselves with the iron particles to form coatings is strikingly shown in this report by resistivity and latent heat of melting experiments. The results in this report indicate that although stability of mercury based ferromagnetic liquids can be much improved by tin and sodium additives, van der Waals forces are still responsible for the aggregation which gives rise to the undesirable high viscosities. Future work will be centered around the elimination or reduction of these attractive forces. This would thus ensure the long term stability of the fluids. It is believed that certain particle coatings will reduce the attractive van der Waals forces.
- Physical Chemistry
- Non-electrical Energy Conversion
- Electricity and Magnetism