Method and closing pores in a thermally sprayed doped lanthanum chromite interconnection layer
Abstract
A dense, substantially gas-tight electrically conductive interconnection layer is formed on an air electrode structure of an electrochemical cell by (A) providing an air electrode surface; (B) forming on a selected portion of the electrode surface, a layer of doped LaCrO{sub 3} particles doped with an element or elements selected from Ca, Sr, Ba, Mg, Co, Ni, Al and mixtures thereof by thermal spraying doped LaCrO{sub 3} particles, either by plasma arc spraying or flame spraying; (C) depositing a mixture of CaO and Cr{sub 2}O{sub 3} on the surface of the thermally sprayed layer; and (D) heating the doped LaCrO{sub 3} layer coated with CaO and Cr{sub 2}O{sub 3} surface deposit at from about 1,000 C to 1,200 C to substantially close the pores, at least at a surface, of the thermally sprayed doped LaCrO{sub 3} layer. The result is a dense, substantially gas-tight, highly doped, electrically conductive interconnection material bonded to the electrode surface. A solid electrolyte layer can be applied to the nonselected portion of the air electrode. A fuel electrode can be applied to the solid electrolyte, to form an electrochemical cell, for example for generation of electrical power. 5 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Westinghouse Electric Corporation
- OSTI Identifier:
- 27709
- Patent Number(s):
- 5389456
- Application Number:
- PAN: 8-195,935
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA (United States)
- DOE Contract Number:
- FC21-91MC28055
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 14 Feb 1995
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION; SOLID ELECTROLYTE FUEL CELLS; ELECTRODES; FABRICATION; COATINGS; LANTHANUM COMPOUNDS; CHROMIUM OXIDES; CALCIUM; STRONTIUM; BARIUM; MAGNESIUM; COBALT; NICKEL; ALUMINIUM; DOPED MATERIALS; SPRAY COATING; HEAT TREATMENTS; CALCIUM OXIDES; ELECTRIC CONDUCTIVITY
Citation Formats
Singh, P, and Ruka, R J. Method and closing pores in a thermally sprayed doped lanthanum chromite interconnection layer. United States: N. p., 1995.
Web.
Singh, P, & Ruka, R J. Method and closing pores in a thermally sprayed doped lanthanum chromite interconnection layer. United States.
Singh, P, and Ruka, R J. Tue .
"Method and closing pores in a thermally sprayed doped lanthanum chromite interconnection layer". United States.
@article{osti_27709,
title = {Method and closing pores in a thermally sprayed doped lanthanum chromite interconnection layer},
author = {Singh, P and Ruka, R J},
abstractNote = {A dense, substantially gas-tight electrically conductive interconnection layer is formed on an air electrode structure of an electrochemical cell by (A) providing an air electrode surface; (B) forming on a selected portion of the electrode surface, a layer of doped LaCrO{sub 3} particles doped with an element or elements selected from Ca, Sr, Ba, Mg, Co, Ni, Al and mixtures thereof by thermal spraying doped LaCrO{sub 3} particles, either by plasma arc spraying or flame spraying; (C) depositing a mixture of CaO and Cr{sub 2}O{sub 3} on the surface of the thermally sprayed layer; and (D) heating the doped LaCrO{sub 3} layer coated with CaO and Cr{sub 2}O{sub 3} surface deposit at from about 1,000 C to 1,200 C to substantially close the pores, at least at a surface, of the thermally sprayed doped LaCrO{sub 3} layer. The result is a dense, substantially gas-tight, highly doped, electrically conductive interconnection material bonded to the electrode surface. A solid electrolyte layer can be applied to the nonselected portion of the air electrode. A fuel electrode can be applied to the solid electrolyte, to form an electrochemical cell, for example for generation of electrical power. 5 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 14 00:00:00 EST 1995},
month = {Tue Feb 14 00:00:00 EST 1995}
}