The Applications and Properties of Ferrofluids Essay -- Magnets Magnet

Missing FiguresThe purpose of this paper is to describe and explain the properties of ferrofluids. Imagine the applications of a liquified substance that can be controlled at a outmatch by a magnetic force. To create such a liquid is not as simple as liquefying a magnetic solid. magnetised solids lose their magnetic properties at the temperature above the Curie temperature of the substance. At that temperature thermic energy overwhelms the tendency of the electrons to align in regions of similar spins. The Curie temperature is fountainhead below the melting point of all normal magnetic solids. (Verschuur, 1993) Ferrofluids track this obstacle. They ar colloidal suspension of magnetic nanoscale magnetic material in a liquid carrier. This gives the Ferrofluid the properties of normal liquids, but allows the entire liquid to be manipulated to an applied magnetic field. (Berger, 1999)In the 1960?s Stephen Pappell with NASA developed ferrofluids to address the riddle of controlling fluids in the zero gravity environment of space. (Verschuur, 1993) Ferrofluids were originally utilise by the space program to create leak proof seals in satellites. The commercial applications were later recognized. A ferrofluid can behave as a liquid O-ring where a rotating shaft enters either a low- or aggressive chamber. The ferrofluid is held in place by permanent magnets and form tight seals, eliminating closely of the friction produced in a conventional mechanical seal. Rotating shaft seals are found in rotating anode X-ray generators and in vacuum chambers use in the semiconductor industry. Ferrofluid seals are also used in fast computer disk drives to eliminate harmful dust particles or opposite impurities that can cause the sensitive data-reading ... ...e3YVBr1dVcRkJvoh.chem.ucla.edu/classes/Magnetic_fluids/pdf/ChemicalEducationArticle.pdf+surfactant+aqueous+ferrofluid&hl=en&ct=clnk&cd=2&gl=us&client=firefox-aEnzel, P., Adelman, N., Beckman, K. J., Campbell, D. J., Ellis, A.B., Lisensky, G. C., (1999)Preparation of an Aqueous-Based Ferrofluid. J. Chem. Educ. Vol. 76, 943. Retrieved whitethorn 7, 2008, from http//mrsec.wisc.edu/Edetc/background/ferrofluid/index.htmlFerrotec (2008), Ferrofluid, Retrieved May 9, 2008, from http//www.ferrotec.com/products/ferrofluid/Nave, R. (2000). Surface Tension. HyperPhysics. Retrieved May 7, 2008, from HyperPhysics database.Verschuur, G (1993). Hidden attractive feature The Mystery and History of Magnetism. New York Oxford University Press.Willis B, (2001), Brownian Motion, Retrieved May 7, 2008, from http//www.worsleyschool.net/science/files/brownian/motion.html