Claims
- 1. A probe for measuring the activity of carbon in molten iron, comprising a carbon measuring element and a working electrode, said carbon measuring element comprising a solid electrolyte having oxygen ion conductivity, a reference electrode on an inner surface of said solid electrolyte adapted to assist in measuring partial pressure of oxygen, and a coating on an outer surface of said solid electrolyte and adapted to contact said molten iron, said coating consisting essentially of a mixture of a carbide MC.sub.x and of an oxide MO.sub.z of the element M other than carbon of which said carbide is constituted, wherein x and z are the stoichiometric ratio of C to M and O to M, respectively, said solid electrolyte containing no carbide.
- 2. A probe according to claim 1, wherein said coating is on the whole outer surface of said solid electrolyte.
- 3. A probe according to claim 1, wherein said coating is on a part of said outer surface of said solid electrolyte.
- 4. A probe according to claim 1, wherein said coating is dotted on said outer surface of said solid electrolyte.
- 5. A probe for measuring the activity of carbon in molten iron, comprising a carbon measuring element and a working electrode, said carbon measuring element comprising a reference electrode adapted to assist in measuring partial pressure of oxygen, a solid electrode having oxygen ion conductivity and a mixed sub-electrode adapted to contact said molten iron and consisting essentially of a mixture of a carbide MC.sub.x and of an oxide MO.sub.z of the element M other than carbon of which said carbide is constituted, wherein x and z are the stoichiometric ratio of C to M and O to M, respectively, said solid electrolyte and said mixed sub-electrode being formed on an outer surface of said reference electrode and alternating with each other in a direction along said outer surface of said reference electrode, said solid electrolyte containing no carbide.
Priority Claims (1)
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Date |
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2-254133 |
Sep 1990 |
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Parent Case Info
This application is a continuation of application Ser. No. 07/765,544 filed Sep. 25, 1991, now abandoned.
US Referenced Citations (6)
Continuations (1)
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765544 |
Sep 1991 |
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