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US 6,555,159 B2Granted
Coating for gas sensors
AssigneeDelphi Technologies, Inc.
InventorsEric P. Clyde, Richard F. Beckmeyer, William J. Labarge, Marsha E. Nottingham
Life of this patent
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Abstract
A method for making a sensor is disclosed. The method comprises: disposing an electrolyte between a first side of sensing electrode and a first side of reference electrode, disposing a first side of a protective layer adjacent to said a second side of said sensing electrode, applying a mixture of a metal oxide, a fugitive material, and a solvent to a second side of the protective layer, and calcining the applied mixture to form said a protective coating on the second side of the protective layer.
Claims22
A method for making a sensor, comprising:
- disposing an electrolyte between a first side of sensing electrode and a first side of reference electrode, wherein said sensing electrode has a first electrical lead in electrical communication with said sensing electrode, and wherein said reference electrode has a second electrical lead in electrical communication with said reference electrode
- disposing a first side of a protective layer adjacent to a second side of said sensing electrode;
- applying a mixture of a metal oxide, a solvent, and a fugitive material selected from the group consisting of carbon black, graphite, non-dissolved organics and combinations comprising at least one of the foregoing materials, to a second side of said protective layer;
- and
- calcining said applied mixture to form a protective coating on said second side of said protective layer;
- wherein said protective coating has a thickness of greater than about 120 μm.
3 more elements
A method for making a sensor, comprising:
- disposing an electrolyte between a first side of sensing electrode and a first side of reference electrode, wherein said sensing electrode has a first electrical lead in electrical communication with said sensing electrode, and wherein said reference electrode has a second electrical lead in electrical communication with said reference electrode;
- disposing a first side of a protective layer adjacent to a second side of said sensing electrode;
- applying a mixture of a metal oxide, a solvent, and a fugitive material selected from the group consisting of carbon black, graphite, non-dissolved organics and combinations comprising at least one of the foregoing materials, to a second side of said protective layer;
- and calcining said applied mixture to form a protective coating on said second side of said protective layer;
- wherein said protective coating has a thickness of about 120 μm to about 160 μm.
2 more elements
A method for making a sensor, comprising:
- disposing an electrolyte between a first side of sensing electrode and a first side of reference electrode, wherein said sensing electrode has a first electrical lead in electrical communication with said sensing electrode, and wherein said reference electrode has a second electrical lead in electrical communication with said reference electrode;
- disposing a first side of a protective layer adjacent to a second side of said sensing electrode.
- applying a mixture of a metal oxide, a fugitive material, and a solvent to a second side of said protective layer;
- and
- calcining said applied mixture to form a protective coating on said second side of said protective layer, wherein said protective coating has a thickness of about 120 to about 160 micrometers.
2 more elements
A method for making a sensor, comprising:
- disposing an electrolyte between a first side of sensing electrode and a first side of reference electrode, wherein said sensing electrode has a first electrical lead in electrical communication with said sensing electrode, and wherein said reference electrode has a second electrical lead in electrical communication with said reference electrode;
- disposing a first side of a protective layer adjacent to a second side of said sensing electrode;
- applying a mixture of a metal oxide, a solvent, and a fugitive material selected from the group consisting of carbon black, graphite, non-dissolved organics and combinations comprising at least one of the foregoing materials, to a second side of said protective layer;
- and
- calcining said applied mixture to form a protective coating on said second side of said protective layer;
- wherein said protective coating has a thickness of greater than about 200 μm.
3 more elements
A method for making a sensor, comprising:
- disposing an electrolyte between a first side of sensing electrode and a first side of reference electrode, wherein said sensing electrode has a first electrical lead in electrical communication with said sensing electrode, and wherein said reference electrode has a second electrical lead in electrical communication with said reference electrode;
- disposing a first side of a protective layer adjacent to a second side of said sensing electrode;
- applying a mixture of a solvent, a fugitive material, and a first material to a second side of said protective layer, wherein said first material consists essentially of about 25 wt. % to about 75 wt. % gamma alumina, about 25 wt. % to about 75 wt. % alpha alumina, and up to about 5 wt % aluminum nitrate;
- and
- calcining said applied mixture to form a protective coating on said second side of said protective layer.
2 more elements
Dependencies are inferred from the claim text.