What is ferrofluid?

Ferrofluid

A ferrofluid (portmanteau of ferromagnetic, and fluid) is a liquid which becomes strongly magnetized in the presence of a magnetic field.

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Some articles on ferrofluid:

Tweeter - Ferrofluid
... Ferrofluid is a suspension of very small (typically 10 nm) iron oxide magnetic particles in a very low volatility liquid, typically a synthetic oil ... Ferrofluid also aids in centering the voice coil in the magnetic gap, reducing distortion ... tweeter has been subjected to elevated power levels, some thickening of the ferrofluid occurs, as a portion of the carrier liquid evaporates ...
Ferrofluid - Applications - Art
... Some art and science museums have special devices on display that use magnets to make ferrofluids move around specially shaped surfaces in a fountain show-like ... Sachiko Kodama is known for her ferrofluid art ... The Australian electronic rock band, Pendulum, used ferrofluid for the music video for the track, Watercolour ...
Ferrofluidic Seal - Benefits and Limitations
... Ferrofluid-based seals used in industrial and scientific applications are most often packaged in mechanical seal assemblies called rotary feedthroughs, which also contain a central shaft, ball bearings and an ... Ferrofluid-sealed feedthroughs reach performance levels that other technologies can't achieve, by optimizing features such as ferrofluid viscosity and magnetic strength, magnet ... Ferrofluid-sealed feedthroughs routinely operate in environments including ultra-high vacuum (below 10−8 mbar), temperatures over 1,000 °C, tens of thousands of RPM, and multiple-atmos ...