What is a magnetic fluid?
Magnetic liquid is a special kind of nanostructrued magnetic material which consists of a colloidal suspension of tiny (about 10 nm) magnetic particles suspended in a carrier liquid. Because the particles are so small, thermal molecular agitation—Brownian motion—keeps them from settling or coalescing.
What is the meaning of ferrofluid?
Ferrofluid is a liquid that is attracted to the poles of a magnet. It is a colloidal liquid made of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a carrier fluid (usually an organic solvent or water).
What are some of the applications of ferrofluids?
Ferrofluid is used in rotary seals in computer hard drives and other rotating shaft motors, and in loudspeakers to dampen vibrations. In medicine, ferrofluid is used as a contrast agent for magnetic resonance imaging (MRI).
Are ferrofluids toxic?
Degeneration and necrosis of viscera were not found. So the nano-magnetic ferrofluid, of which toxicity is very low, may be used as a drug carrier.
How are magnetic liquids useful?
Liquid magnets could be fantastically useful for creating tools that range from artificial cells that deliver cancer-killing medication, to flexible liquid robots that can change their shape and adapt to their surroundings.
How does ferrofluid impact society?
When a ferrofluid is placed near a magnet, the magnet attracts the iron-containing particles. And this makes ferrofluids useful in many industries. Ferrofluids are used as liquid seals to keep dust out of computer hardrives. They can also be used in loudspeakers to help keep them cool.
Is ferrofluid safe to drink?
SAFETY NOTES Do not drink ferrofluid. Rare earth magnets are powerful! Do not swallow.
What kind of liquid is strongly magnetized in the presence of a magnetic field?
A ferrofluid (portmanteau of ferromagnetic and fluid) is a liquid that becomes strongly magnetized in the presence of a magnetic field.
How are ferrofluids different from magnetorheological fluids?
The difference between ferrofluids and magnetorheological fluids (MR fluids) is the size of the particles. The particles in a ferrofluid primarily consist of nanoparticles which are suspended by Brownian motion and generally will not settle under normal conditions.
When do magnetorheological fluids lose their magnetic properties?
Magnetorheological fluids have micrometre scale magnetic particles that are one to three orders of magnitude larger than those of ferrofluids. However, ferrofluids lose their magnetic properties at sufficiently high temperatures, known as the Curie temperature .
How is a magnetic field related to a current?
Magnetic field: 1) A moving charge or current creates a magnetic field in the surrounding. space (in addition to E). 2) The magnetic field exerts a force F m on any other moving charge or. current present in that field. – The magnetic field is a vector field vector quantity associated with. each point in space.