Ferrofluids

By: Zohar

What are Ferrofluids?

• A Ferrofluids is a liquid that becomes strongly magnetized in the presence of a magnetic field. • Ferrofluids was invented in 1963 by NASA’s

Steve Papell as a liquid rocket fuel,• That could be drawn toward a pump inlet in a

weightless environment by adding a magnetic field.

How Ferrofluids work

• Basically, Ferrofluids contain magnetite. • Magnetite can be prepared by combining the

appropriate amounts of an Fe(II) salt and an Fe(III) salt in basic solution.

• It’s a combination that causes mixed valence oxide, Fe3O4, to precipitate from solution: 2 FeCl3 + FeCl2 + 8 NH3 + 4H2O --> Fe3O4 + 8 NH4Cl

Pictures

Video

• https://www.youtube.com/watch?v=WXvar-4M6VA.

Thanks for watching! !