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Mechanical Engineering Commons

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Michigan Technological University

1990

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Full-Text Articles in Mechanical Engineering

Method Of Magnetizing Nonmagnetic Materials, Jiann-Yang Hwang Mar 1990

Method Of Magnetizing Nonmagnetic Materials, Jiann-Yang Hwang

Michigan Tech Patents

Particles of a nonmagnetic material are rendered magnetic by contacting their surfaces with a magnetizing reagent comprising water containing particles of a magnetic material, each of which has a two layer surfactant coating including an inner layer and an outer layer. The inner layer covers the magnetic particle and is a mono- molecular layer of a first water soluble, organic, hetero- polar surfactant containing at least 3 carbon atoms and having a functional group on one end which bonds with the magnetic particle. The outer layer coats the inner layer and is a monomolecular layer of a second water soluble ...