Method of applying high temperature compatible insulation to superconductors
AssigneeFlorida State University
InventorsErdal Celik, Yusuf Hascicek, Ibrahim Mutlu
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Abstract
There is described a method of applying insulative coating on high temperature superconductors and low temperature superconductors from sol-gel solutions prepared from Zr, or Zr with one of Mg, Y, Ce, In and Sn based precursor materials. The solution is prepared with isopropanol as a solvent and acetyl acetone as a catalyst. The conductors are dipped into the solution and thereafter dried at a temperature effective to evaporate the solvent. Thereafter, heat treatment in the presence of oxygen is applied at a temperature sufficient to oxidize the precursors to result in a ceramic insulative coating on the conductor.
Claims12
A method of coating a conductor with an insulating composition, comprising:
- preparing a sol-gel coating solution from one of;
- (1) Zirconium tetrabutoxide;
- (2) Zirconium tetrabutoxide and Magnesium 2,4-pentadionate;
- (3) Zirconium tetrabutoxide and Yttrium nitrate;
- (4) Zirconium tetrabutoxide and Yttrium isoproxide;
- (5) Zirconium tetrabutoxide and Cerium (III) 2,4-pentadionate;
- (6) Zirconium tetrabutoxide and Indium oxide;
- (7) Zirconium tetrabutoxide and Indium isoproxide;
- and (8) Zirconium tetrabutoxide and Tin oxide;
- a solvent and a catalyst;
- dipping a conductor in the sol-gel coating solution;
- drying the dip coated conductor at a temperature and for a time sufficient to evaporate the solvent and catalyst;
- and
- heating the conductor in an oxygen containing atmosphere at a temperature and for a time sufficient to result in a ceramic electrically insulative coating which is one of:
- (1) ZrO2;
- (2) MgO—ZrO2;
- (3) Y2O3—ZrO2;
- (4) CeO2—ZrO2;
- (5) In2O3—ZrO2;
- (6) SnO2—ZrO2, and with the ceramic coating being chemically bonded to the conductor.
Dependencies are inferred from the claim text.