Ceramic Electrical Insulation Coating on Bi2Sr2CaCu208-x Round Wire
The present invention relates to an electrical insulation on Bi2Sr2CaCu208-x (Bi-2212) superconductor wire used in high field superconducting magnets. More specifically, it relates to a method for preparing suitable ceramic powder solvent suspension (slurry) and thereby applying thin ceramic coating on Bi-2212 superconducting wire by the dip coating process.
- Excellent adherence before and after the heat treatment - HT
- Thickness ~11Âµm (before HT), ~7 Âµm (after HT); Break down voltage ~300V (after HT)
- No large cracks but presence of porosity provides pathways for oxygen getting into the wire
- No degradation in Ic values or superconducting properties
- Long length capability
- Al2O3 ceramic is another candidate for Bi-2212 insulation