Spinning Ceramic Discs On Liquid Nitrogen

The black disk is yttrium barium copper oxide y ba2 cu3 o7 ceramic which becomes superconductive at 77k liquid nitrogen s boiling point.

Spinning ceramic discs on liquid nitrogen. And this is a ceramic disk made from barium yttrium copper oxide and this is a small yet powerful magnet. Let s see what happens when we place the ceramic disk in the liquid nitrogen. The strength 1 gpa and nitrogen permeance 0 1 mmol m 2 pa 1 s 1 at 21 c of stainless steel fibers sintered at 1050 1100 c are superior as compared to their ceramic counterparts. High temperature superconductors abbreviated high t c or hts are operatively defined as materials that behave as superconductors at temperatures above 77 k 196 2 c.

Now when the disk is warm the magnet just sits there. Chill the disc to 77 degrees kelvin with liquid nitrogen and it produces a striking meissner effect magnetic levitation when the neodymium magnet is introduced. The specific experiment provided here is safe. All superconducting materials known at ordinary pressures currently work far below ambient temperatures and therefore require.

Superconductivity can be demonstrated with a disk of yttrium barium copper oxide y ba2 cu3 o7 ceramic and a neodymium iron boron or other strong magnet what you see in the pictures below are the ceramic disk with a small powerful magnet sitting on it. With a maximum power of 1000 w e g. The handling of liquid nitrogen is dangerous and must be done by the teacher. 321 1 f the boiling point of liquid nitrogen one of the simplest coolants in cryogenics.

The train consists of a styrofoam box that contains two superconductor discs with liquid nitrogen covering them. Sitting on a black metal disc with liquid nitrogen and watching the magnet take off into the air spinning and spinning. The gold colored cube is a very strong magnet. For most high temperature ceramic superconductors such as those made of yttrium barium copper oxide ybco or bismuth strontium calcium copper oxide bscco liquid nitrogen can be used to cool.

Cite examples of ceramic materials. However wear your safety goggles apron and gloves. The track is made of nine bz084 magnets. Special thanks to the folks from air products who helped us with the liquid nitrogen nitrogen safety and overall liquid nitrogen know how.

The excellent properties of the stainless steel hollow fibers make them suitable as membrane supports for applications involving harsh environments. 50 w reflected 6 6 a peak coil current into 3 solenoidal coils in series and a frequency of 100 khz the levitation force on the disk was determined to be no greater than 5 g. When liquid nitrogen is added the disk becomes a superconductor. Liquid nitrogen demonstrations including some explosions.