Dip coating of YBCO precursor films on substrates
OwnerChristine L. Vrtisinventor
Life of this patent
Estimating the term…
Abstract
A method for providing a superconductive coating on, for instance, three dimensional substrates by dip coating is disclosed. The dip coating formulation includes a vehicle of terpineol, butoxyethyl acetate and mixed with YBCO, a vehicle precursor material, to form an ink having a viscosity ranging from 2100 cPs to about 2500 cPs. After the substrate is dipped in the dip coating ink, it is dried and sintered. The formulation is prepared by dissolving the binder in the terpineol and butoxyethyl acetate solvents to create a vehicle. The unreacted YBCO precursor material is then milled with the vehicle to create an ink a dip ink formulation having the aforenoted viscosity.
Claims58
A formulation for dip coating a superconducting coating onto a substrate, the formulation comprising:
- from about 71 wt % to about 73 wt % unreacted YBa2Cu3O6+x precursor powder and from about 27 wt % to about 29 wt % vehicle,
- the vehicle comprising
- from about 47 wt % to about 49 wt % terpineol,
- from about 47 wt % to about 49 wt % butoxyethyl acetate, and
- from about 2 wt % to about 4 wt % of a binder.
A method for applying a superconducting coating onto a substrate by dip coating, the method comprising:
- providing a substrate with a first thickness;
- providing a vehicle comprising
- from about 47 wt % to about 49 wt % terpineol,
- from about 47 wt % to about 49 wt % butoxyethyl acetate, and
- from about 2 wt % to about 4 wt % of a binder;
- mixing the vehicle with unreacted YBa2Cu3O6+x, precursor powder to provide a dip coating formulation comprising from about 71 wt % to about 73 wt % unreacted YBa2Cu3O6+x precursor powder and from about 27 wt % to about 29 wt % vehicle;
- dipping the substrate in the dip coating formulation to form a coating thereon having a second thickness thereon;
- removing the substrate from the dip coating formulation;
- drying the substrate;
- and
- melt processing the substrate.
A formulation for dip coating a superconducting coating onto a substrate, the formulation consisting essentially of:
- about 72 wt % unreacted YBa2Cu3O6+x precursor powder and about 28 wt % vehicle, the vehicle consisting essentially of
- from about 47 wt % to about 49 wt % alpha-terpineol,
- from about 47 wt % to about 49 wt % 2-butoxyethyl acetate,
- from about 1 wt % to about 2 wt % B-67™ acryloid, and
- from about 1 wt % to about 2 wt % T-200™ cellulose.
A method for applying a superconducting coating onto a substrate by dip coating, the method comprising:
- providing a substrate with a first thickness;
- providing a vehicle consisting essentially of
- from about 47 wt % to about 49 wt % alpha-terpineol,
- from about 47 wt % to about 49 wt % 2-butoxyethyl acetate,
- from about 1 wt % to about 2 wt % B-67™ acryloid, and
- from about 1 wt % to about 2 wt % T-200™ cellulose;
- mixing the vehicle with unreacted YBa2Cu3O6+x precursor powder to provide a dip coating formulation comprising about 72 wt % unreacted YBa2Cu3O6+x precursor powder and about 28 wt % vehicle and a viscosity of about 2400 cPs at 20 s−1;
- dipping the substrate in the dip coating formulation form a coating thereon having a second thickness;
- removing the substrate from the dip coating formulation;
- drying the substrate;
- and
- melt processing the substrate.
Dependencies are inferred from the claim text.