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US 4,541,899 AGranted
Method of heating a solid electrolyte body
AssigneeNGK Insulators, Ltd.
InventorsSyunzo Mase, Shigeo Soejima
Life of this patent
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Abstract
In a heating system for heating a ceramic body suitably adapted for, but not limited to, a detector to measure the oxygen concentration of a gaseous mixture such as automobile exhaust gas by using the principle of an oxygen concentration cell made of an oxygen ion conductive solid electrolyte body with electrodes mounted on opposite surfaces thereof, the inventive heater or detector and the method use AC voltage electrode means provided on the solid electrolyte body to apply an AC voltage thereto for heating the heater or detector.
Claims5
A method of heating a solid electrolyte body comprising the steps of:
- providing a heating element having two separate electrodes contacting the solid electrolyte body, such that said solid electrolyte body is located between said two separate electrodes;
- and
- applying an AC current across said two separate electrodes with a frequency sufficiently high such that an impedance between said electrodes is largely independent of interface capacitances between said electrodes and a surface where said electrodes contact said solid electrolyte body.
Dependencies are inferred from the claim text.