The long term stability of magnetic liquids for energy conversion devices

A number of techniques for preparing ferromagnetic liquids containing small ferromagnetic particles dispersed in a metallic carrier are described. The fluids of this type may be used in energy conversion systems and particular emphasis is placed on factors governing stability. The effects of tin coatings on iron particles and the nature of the carrier fluid on stability is discussed together with the possibility of producing fluids with long term stability. (author)