Neodymium Magnet And Pyrolytic Carbon

Part 1. High magnetic strength table

Diamagnetism ranking:Superconductivity> Pyrolysis Graphite> Bismuth> Mercury> Diamond> Lead> Graphite> Copper> Water

Materials Unit Xv(×10-5)
Superconductivity         -105
Pyrolysis   Graphite -40.9
Bismuth -16.6
Mercury -2.9
Diamond         -2.1
Lead         -1.8
Graphite         -1.6
Copper         -1.0
Water           -0.91


Superconductor is completely diamagnetic material which requires such a property in the ultra-low temperature environment created by liquid nitrogen, the applied magnetic field cannot enter or be present in a wide range of superconductors, it is an essential property.

For better understanding, please see the diagram below:

applied magnetic field

applied magnetic field

Who discovered it? It is the “Meissner effect “.

In 1933, when the German physicist Meissner (W. Meissner) and Orson Field (R.Ochsebfekd) focus on the tin crystal ball superconductor, they found that the magnetic field distribution measurement in small magnetic field the metal cooling into the superconducting state, the magnetic field lines in the body it is expelled, the lines of magnetic force can’t through it in the body, that is to say, superconductor in the superconducting state, the magnetic field in the body identity to zero.

Part 2. The magnetic suspension can be achieved- Pyrolytic carbon

The high resistance of pyrolytic carbon makes it possible to achieve magnetic suspension on magnets. Please see the pictures below:

Neodymium Magnet And Pyrolytic Carbon

Neodymium Magnet And Pyrolytic Carbon

Pyrolytic graphite rare materials commonly used in scientific research. Is by far the strongest diamagnetic material at room temperature. These wonderful properties make it on the magnetic levitation technology have good application prospects.

Netizens homemade pyrolytic graphite video:

This is a kind of artificial allotropes of carbon and graphite structure similar, usually in a vacuum heating fiber make its dehydrogenation deoxidization generated, it is called a Pyrolytic carbon (Pyrolytic carbon).