公开(公告)号：US4220517A

公开(公告)日：1980-09-02

申请号：US24773

申请日：1979-03-28

申请人： Hitoshi Niwa ,  Naoto Miwa ,  Masatoshi Suzuki ,  Masami Ouki

发明人： Hitoshi Niwa ,  Naoto Miwa ,  Masatoshi Suzuki ,  Masami Ouki

IPC分类号： G01N27/409 ,  G01N27/407 ,  G01N27/58

CPC分类号： G01N27/4075

摘要： In an oxygen concentration sensing apparatus comprising a solid, oxygen ion conductive, electrolyte and intervening between two electrodes to generate across the two electrodes a potential difference due to a difference in oxygen concentrations at the boundaries between the two electrodes and the solid electrolyte, one of the two electrodes is made of a metal performing catalytic action, one end portion of the one electrode is embedded in the solid electrolyte to be fixed thereby, the other end portion of the one electrode projects outwardly of the solid electrolyte, a portion of the one electrode contacting with an outer surface of the solid electrolyte is hermetically sealed with a nonconductive layer of a heat-resistant material, and the other electrode is made of a porous metal performing catalytic action and is disposed on the outer surface of the solid electrolyte but preventing the other electrode from being in contact with the one electrode.Further, the oxygen concentration sensing apparatus may be provided with an electric circuit for making an electric current flow intermittently from the one electrode through the solid electrolyte to the other electrode thereby to maintain the oxygen concentration at the boundary between the one electrode and the solid electrolyte at a constant level.

摘要翻译： 在包含固体，氧离子导电，电解质和介于两个电极之间的氧浓度感测装置中，在两个电极之间产生由于两个电极和固体电解质之间的边界处的氧浓度差异而产生的电位差， 两个电极由执行催化作用的金属制成，一个电极的一个端部嵌入固体电解质中以固定，一个电极的另一个端部突出于固体电解质的外部，一部分 与固体电解质的外表面接触的电极用耐热材料的非导电层气密密封，另一个电极由执行催化作用的多孔金属制成，并且设置在固体电解质的外表面上，但是防止 另一个电极与一个电极接触。 此外，氧浓度检测装置可以设置有用于使电流从一个电极通过固体电解质间歇地流动到另一个电极的电路，从而保持在一个电极和固体电解质之间的边界处的氧浓度 在一个恒定的水平。