Poison resistant sensor
First Claim
Patent Images
1. A sensor, comprising:
- a sensing electrode having a first and second side and a first electrical lead in electrical communication with said sensing electrode;
a reference electrode having a first and second side and a second electrical lead in electrical communication with said reference electrode;
an electrolyte disposed between and in intimate contact with said first side of said sensing electrode and said first side of said reference electrode; and
a first side of a protective layer disposed adjacent to said second side of said sensing electrode, wherein said protective layer has a protective coating, said protective coating comprising a mixture of alpha alumina particles having a size up to about 1 micrometer, and gamma alumina agglomerates, wherein said alpha alumina particles pack between said gamma alumina agglomerates.
1 Assignment
0 Petitions
Accused Products
Abstract
The poison resistant sensor comprises a sensing electrode (4) having a first and second side; a reference electrode (7) having a first and second side; an electrolyte (1) disposed between and in intimate contact with the first side of the sensing electrode and the first side of the reference electrode; a first side of a protective layer (3) disposed adjacent to the second side of the sensing electrode; and a protective coating (17), comprising alpha alumina and gamma alumina, disposed in physical contact with the second side of the protective layer.
35 Citations
30 Claims
-
1. A sensor, comprising:
-
a sensing electrode having a first and second side and a first electrical lead in electrical communication with said sensing electrode;
a reference electrode having a first and second side and a second electrical lead in electrical communication with said reference electrode;
an electrolyte disposed between and in intimate contact with said first side of said sensing electrode and said first side of said reference electrode; and
a first side of a protective layer disposed adjacent to said second side of said sensing electrode, wherein said protective layer has a protective coating, said protective coating comprising a mixture of alpha alumina particles having a size up to about 1 micrometer, and gamma alumina agglomerates, wherein said alpha alumina particles pack between said gamma alumina agglomerates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method for manufacturing a sensor, comprising:
-
disposing an electrolyte between a first side of a sensing electrode and a first side of a reference electrode;
disposing a first side of a protective layer adjacent to a second side of said sensing electrode; and
disposing a protective coating comprising a mixture of alpha alumina particles having a size up to about 1 micrometer, and gamma alumina agglomerates, in physical contact with said protective layer, such that said alpha alumina particles pack between said gamma alumina agglomerates. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
mixing about 25 wt % to about 75 wt % gamma alumina and about 25 wt % to about 75 wt % alpha alumina with a liquid to form a mixture; and
applying the mixture to said sensor.
-
-
24. A method of manufacturing a sensor of claim 23, comprising mixing about 35 wt % to about 65 wt % gamma alumina and about 35 wt % to about 65 wt % alpha alumina.
-
25. A method for manufacturing a sensor as in claim 24, comprising mixing about 45 wt % to about 55 wt % gamma alumina and about 45 wt % to about 55 wt % alpha alumina.
-
26. A method for manufacturing a sensor as in claim 16, comprising mixing a binder with said alpha alumina and said gamma alumina.
-
27. A method for manufacturing a sensor as in claim 26, wherein said binder is selected from the group consisting of aluminum nitrate and aluminum hydroxide, and mixtures comprising at least one of the foregoing.
-
28. A method for manufacturing a sensor as in claim 27, wherein said mixture comprises ump to about 15 wt % binder.
-
29. A method for manufacturing a sensor as in claim 28, wherein said mixture comprises up to about 10 wt % binder.
-
30. A method for manufacturing a sensor as in claim 29, wherein said mixture comprises about 1 wt % to about 3 wt % binder.
Specification