Preparation and Properties of a Stable Metallic Ferrofluid.
Abstract
Results are presented in this report on the long term stability of metallic ferromagnetic liquids containing iron particles in mercury. The effect of various coatings is considered. In particular a tin coating is found to enhance the stability in the long term. A different method to introduce stability by controlling the contact potential between particle and fluid by the addition of sodium is described and shown to improve the stability to a point where the long term growth is negligible (the maximum radius being 40-45A). This is a very important development and leads to the possible uses of these fluids in devices such as magnetic seals and energy conversion systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1975
- Accession Number
- ADA018858
Entities
People
- J. Popperwell
- P. L. Windle
- S. W. Charles
Organizations
- Bangor University