| 摘要 |
A method of manufacturing an electrochemical cell for determining the cencentration of a component of a measurement gas, which comprises a solid electrolyte body, and a pair of electrodes which are disposed on the solid electrolyte body and spaced apart from each other, such that one of the electrodes is exposed to the measurement gas via a porous ceramic diffusion layer having a predetermined diffusion resistance to the component of the measurement gas, so that an atmosphere adjacent to the above one electrode is controlled by means of reaction of the pair of electrodes by application of an electric current thereto, the method comprising the steps of: preparing an unfired or calcined laminar structure of the electrochemical cell such that an unfired or calcined layer of the above one electrode is covered by an unfired or calcined layer of the porous ceramic diffusion layer; starting a firing process to fire the laminar structure at predetermined elevated temperatures; applying an electric voltage or current to the electrodes; and terminating the firing process when a value of current flowing through the electrodes or a value of voltage present between the electrodes has become equal to a predetermined value at which is obtained a desired rate of diffusion of the gas component to the above one electrode through the porous ceramic diffusion layer.
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