| 摘要 |
PURPOSE: To provide a current gas sensor for selectively measuring the partial pressure of a gas with high accuracy and a method by which the partial pressure of one or more kinds of gases can be measured current-selectively. CONSTITUTION: A gas sensor is provided with a solid electrolyte and an inactive electrode. In an electrolyte contained in the sensor, ions contained in the electrolyte cause a secondary equilibrium reaction with a gas to be measured while generating an electrically measurable signal and form a reaction product when a current or voltage is impressed upon the electrolyte. A favorable solid electrolyte is polycrystalline Na<+> -β" aluminum monoxide, NASICON, zirconium oxide(CSZ) stabilized to a hexagonal system, or tetragonal zirconium oxide(TZP). This method is composed of the impression of the current or voltage upon the solid electrolyte, provocation of the reversible formation of at least one kind of ions or a compound which generates the ions contained in the electrolyte and a redox product from the gas at the laminar boundary of the electrolyte, and measurement of generated electric signals. |
