Experiments with ferromagnetic liquid are widespread in the form of videos on the Internet. The fact is that this type of liquid under the influence of a magnet makes certain movements that does experiments very spectacular. Let's try to make such liquid independently. But for a start we will find out that it is.
Instruction
1. Ferromagnetic liquid can be made the hands in house conditions. For this purpose take oil (will be suitable motor, sunflower and other) and also a toner for the laser printer (substance in the form of powder). Now mix both ingredients to consistence of sour cream.
2. In order that the effect was maximum, warm the turned-out mix on a water bath during about half an hour, do not forget at the same time it to stir slowly.
3. Remember that strong magnetization not each toner possesses, so try to choose the most qualitative.
4. Ferromagnetic liquid (ferroflyuid) is a liquid which is strongly polarized under the influence of magnetic field. In other words, if to bring closer a usual magnet to this liquid, it makes certain movements, for example, becomes similar to a hedgehog, rises a hump, etc.
5. In general ferromagnetic liquids are colloidal systems which consist of ferromagnetic or ferrimagnitny particles of the nanometer sizes. These particles are in suspension in liquid (liquid – usually water or organic solvent).
6. To create stability of similar liquid, it is necessary to connect ferromagnetic particles about surfactant (surfactant) - it creates a so-called protective cover around particles that does not allow their adhesion, thanks to Van der Waals or magnetic forces.
7. However despite the name, ferromagnetic liquids have no ferromagnetic properties. There is it because after external magnetic field is gone, they do not keep residual magnetization.
8. Ferromagnetic liquids in fact are paramagnetics, also often call them "superparamagnetics" because they have extremely high magnetic susceptibility.