Pyrolytic Graphite Two 1/4\"x1/4\" pieces for NdFeB Rare Earth Magnet Levitation
![Pyrolytic Graphite Two 1/4\](img-large/g/Q2MAAOSwyQtVw-nC/s-l1600/Pyrolytic-Graphite-Two-1-4-x1-4-pieces-for-NdFeB-R.jpg "Pyrolytic Graphite Two 1/4\")
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Pyrolytic Graphite Two 1/4\"x1/4\" pieces for NdFeB Rare Earth Magnet Levitation:
$6.50
This sale is for 2 pieces of pyrolytic graphite with the following dimensions:.250\" x .249\" x .032\".250\" x .250\" x .019\"They come packed in a small wooden box. The picture shown is not of the actual pieces in this sale but the pieces included in this acution are similar. This sale does NOT include any magnets or steel plate. To demonstrate levitationwith these pieces of graphite, you will need an array of four or more 1/4\" or larger NdFeB magnets with a strengthof N42 or stronger. A steel plate is not necessary but helps keep the magnets in the proper orientation. Pyrolytic graphite has the property that it is the most diamagnetic substance having a diamagnetic constant of 450 x 10-6 as compared to bismuth with the second highest constant of 170 x 10-6. A diamagnetic substance repels all magnetic fields and pyrolytic graphite is also light enough that it will float over a strong magnetic field. I\'ve tried to float a .002\" thick piece of bismuth foil and it is simply too heavy.
Pyrolytic graphite is a synthetic material made by chemical vapor deposition, Methane gas at low temperature is heated to 2000 degrees Celsius. Layer upon layer is deposited at a rate of 1/1000\" per hour. The layers of carbon atoms form crystals of hexogonal sheets.NdFeB magnets will not loose their strength if they are not heated and pyrolytic graphite is an extremely stable and inert substance. This means that the pyrolytic graphite will levitate forever. This is sort of perpetual un-motion. This perfect state of balance is truely inspiring to see.
Pyrolytic Graphite Two 1/4\"x1/4\" pieces for NdFeB Rare Earth Magnet Levitation:
$6.50