Ion sensor
AssigneeNgk Spark Plug Co., Ltd.
InventorsTakashi Katoh, Jun-ichi Tokumoto
Life of this patent
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Abstract
Ion sensor having an ion-selective electrode and a reference electrode, both being unified, without internal liquid solution. The ion-selective electrode part has a solid solution of halogenide of conducting ions of solid electrolyte and halogenide of metal for an internal electrode, e.g., NaCl-AgCl solid solution. The reference electrode part has a solid solution of halogenide of the group Ia or IIa, e.g., Na, K, and a halogenide of metal for an internal electrode, e.g., NaCl-AgCl solid solution. The electrode parts are supported by an insulating substrate. A solid electrolyte such as NASICON or ionophore such as valinomycin is used as an ion-sensitive membrane.
Claims12
An ion sensor comprising in a single unit, an ion selective electrode and a reference electrode, each electrode being supported by an insulating substrate,
- wherein said ion-selective electrode comprises, respectively, a solid electrolyte ceramic as an ion-sensitive membrane, a solid solution mixture of a halogenide of conducting ions of the solid electrolyte, and a halogenide of a metal of an internal electrode, and an internal electrode, in top to bottom order as viewed from the side of said ion-selective electrode to be contacted by ions under measurement, and
- wherein said reference electrode comprises, respectively, a solid solution mixture of a halogenide of a metal of the group Ia or IIa of the International Periodic Table, and a halogenide of a metal of an internal electrode, and an internal electrode, in top to bottom order as viewed from the side of the reference electrode part to be contacted by ions under measurement.
An ion sensor comprising in a single unit, an ion selective electrode and a reference electrode, each electrode being supported by an insulating substrate,
- wherein said ion-selective electrode comprises, respectively, an ionophore as an ion-sensitive membrane, a solid electrolyte ceramic, a solid solution mixture of a halogenide of conducting ions of the solid electrolyte, and a halogenide of a metal of an internal electrode, and an internal electrode, in top to bottom order as viewed from the side of said ion-selective electrode to be contacted by ions under measurement, and
- wherein said reference electrode comprises, respectively, a solid solution mixture of a halogenide of a metal of the group Ia or IIa of the International Periodic Table, and a halogenide of a metal of an internal electrode, and an internal electrode, in top to bottom order as viewed from the side of the reference electrode part to be contacted by ions under measurement.
Dependencies are inferred from the claim text.