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    • 1. 发明授权
    • Oxygen concentration sensor
    • 氧浓度传感器
    • US4362609A
    • 1982-12-07
    • US246435
    • 1981-03-23
    • Hiromi SanoMasatoshi SuzukiMasahiro HamayaMasami Ouki
    • Hiromi SanoMasatoshi SuzukiMasahiro HamayaMasami Ouki
    • G01N27/409G01N27/407G01N27/413G01N27/58
    • G01N27/4077
    • An oxygen concentration sensor including a solid electrolyte member having two portions, one portion being exposed to a gas of interest and the other portion being exposed to the atmosphere, an inner cover formed with a first space communicating portion arranged to communicate with the other portion of the solid electrolyte member, and a water-proof cover enclosing the inner cover to define a ventilating passage between the inner cover and the water-proof cover and formed with a second space communicating portion maintaining the first space communicating portion of the inner cover in communication with the atmosphere through the ventilating passage. The second space communicating portion of the water-proof cover is axially spaced apart from the first space communicating portion of the inner cover by a predetermined distance. Also included is structure to prohibit the flow of water through said ventilating passage. The second space communicating portion is separated from this structure.
    • 一种氧浓度传感器,包括具有两部分的固体电解质部件,一部分暴露于感兴趣的气体,另一部分暴露于大气中;内盖,形成有第一空间连通部分,其布置成与另一部分 所述固体电解质构件和防水盖包围所述内盖,以在所述内盖和所述防水罩之间形成通风通道,并形成有第二空间连通部,所述第二空间连通部保持所述内盖的所述第一空间连通部的连通 气氛通过通风通道。 防水罩的第二空间连通部分与内盖的第一空间连通部分轴向隔开预定距离。 还包括禁止水通过所述通风通道的结构。 第二空间连通部分与该结构分离。
    • 5. 发明授权
    • Oxygen concentration sensing apparatus
    • 氧气浓度检测装置
    • US4313810A
    • 1982-02-02
    • US53181
    • 1979-06-27
    • Hitoshi NiwaNaoto MiwaMasatoshi SuzukiMasami Ouki
    • Hitoshi NiwaNaoto MiwaMasatoshi SuzukiMasami Ouki
    • G01N27/409B01D53/86B01D53/94F23N5/00G01N27/406G01N27/407G01N27/413G01N27/58
    • G01N27/407F23N5/006G01N27/4065
    • An oxygen concentration sensing apparatus in which a block of an oxygen-ion conductive solid electrolyte is interposed between a first electrode and a second electrode disposed opposite to each other. The first electrode is made of a catalytic metal and is exposed at a portion thereof on a surface of the solid electrolyte block, and an electrical insulating heat-resistive layer having a plurality of communication pores covers the exposed portion of the first electrode. The second electrode is porous and made of a catalytic metal. The solid electrolyte is wholly exposed to a stream of gases containing oxygen whose concentration is to be measured, and during measurement, a current source supplies continuously an electric current in a direction from the first electrode toward the second electrode. When the partial pressure of oxygen gas produced at the first electrode and existing in the vicinity thereof exceeds a predetermined value, the excess pressure portion of oxygen gas is discharged into the stream of gases through the communication pores of the heat-resistive layer thereby maintaining substantially constant the partial pressure of oxygen gas in the vicinity of the first electrode. An electromotive force representing the ratio between the partial pressure of oxygen around the first electrode and that in the stream of gases containing oxygen is measured to determine the concentration of oxygen contained in the gases.
    • 一种氧浓度检测装置,其中氧离子传导性固体电解质块插入在彼此相对设置的第一电极和第二电极之间。 第一电极由催化金属制成,并在其一部分暴露在固体电解质块的表面上,具有多个连通孔的电绝缘耐热层覆盖第一电极的暴露部分。 第二电极是多孔的并由催化金属制成。 固体电解质完全暴露于含有浓度要测量的氧气的气流中,并且在测量期间,电流源在从第一电极朝向第二电极的方向上连续供给电流。 当在第一电极处产生的并且存在于其附近的氧气的分压超过预定值时,氧气的过量压力部分通过耐热层的连通孔排放到气流中,从而基本上保持 使第一电极附近的氧气的分压恒定。 测量表示第一电极周围的氧分压与含氧气体流之间的比率的电动势,以确定气体中所含的氧浓度。
    • 6. 发明授权
    • Oxygen concentration sensing apparatus
    • 氧气浓度检测装置
    • US4220517A
    • 1980-09-02
    • US24773
    • 1979-03-28
    • Hitoshi NiwaNaoto MiwaMasatoshi SuzukiMasami Ouki
    • Hitoshi NiwaNaoto MiwaMasatoshi SuzukiMasami Ouki
    • G01N27/409G01N27/407G01N27/58
    • G01N27/4075
    • 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.
    • 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。
    • 7. 发明授权
    • Oxygen concentration detector
    • UST983005I4
    • 1979-06-05
    • US890904
    • 1978-03-27
    • Yoshinori AkiyamaMasami OukiMasatosi Suzuki
    • Yoshinori AkiyamaMasami OukiMasatosi Suzuki
    • G01N27/407
    • G01N27/4077
    • an improved oxygen concentration detector is described having an oxygen concentration sensor which produces an electromotive force in accordance with a difference between an oxygen concentration in the gas components of a gas under test and an oxygen concentration in a reference gas, and first and second electrodes formed on the gas-under-test side and the reference gas side, respectively, of the oxygen concentration sensor, so that the electromotive force produced by the oxygen concentration sensor is taken across the two electrodes, in which the improvement comprises a first protective member arranged to cover the first electrode on the oxygen concentration sensor and having a number of pores through which the gas under test can pass, and a second protective member arranged between the first electrode and the first protective member also having a number of pores through which the gas under test can pass. The first and second protective members are spaced apart from each other to form a gap between them and the pores of the first protective member and the pores of the second protective member are arranged in a staggered relationship to each other.The pores of the first protective member may have a louvered shape or the pores of the two protective members may partially overlap each other. The pore sizes for both of the protective members are preferably in the range of 0.5 mm to 3.0 mm.The detector assembly is effective in reducing the flow rate of the gas under test within the exposed detector so that the underlying electrode is not substantially peeled off.
    • 8. 发明授权
    • Sintered body of zirconia for oxygen concentration sensor
    • 用于氧浓度传感器的氧化锆烧结体
    • US4219359A
    • 1980-08-26
    • US22929
    • 1979-03-21
    • Naoto MiwaMasami OukiKatsuhiko TanakaMasatosi Suzuki
    • Naoto MiwaMasami OukiKatsuhiko TanakaMasatosi Suzuki
    • C04B35/48C04B35/486G01N27/12G01N27/407H01M8/12G01N27/58
    • G01N27/4073C04B35/486H01M8/1253Y02E60/525Y02P70/56
    • A sintered body of zirconia material for an oxygen concentration sensor exhibiting an electromotive force in accordance with the difference in the concentration of oxygen between a gas tested and a reference gas, consisting essentially of partially stabilized sintered zirconia and at least one additive selected from the group of yttrium oxide, calcium oxide and ytterbium oxide which zirconia has a cubic phase and a monoclinic phase existing in mingling relation. The ratio of the X-ray diffraction intensity of the surface (111) of the monoclinic phase to the X-ray diffraction intensity of the surface (111) of the cubic phase or the ratio I(111)/I(111) is in the range between 0.05 and 0.40, and the value of the X-ray diffraction intensity ratio caused by heating the sintered zirconia material to, and holding the same at, the temperature range between 200.degree. and 300.degree. C. minus the former ratio of the X-ray diffraction intensity is in the range between -0.05 and +0.10.
    • 一种用于氧浓度传感器的氧化锆材料烧结体,其表现出根据测试气体和参考气体之间的氧气浓度差的电动势,其基本上由部分稳定的烧结氧化锆和至少一种选自下组的添加剂组成: 的氧化钇,氧化钙和氧化镱,氧化锆具有立方相和单相相位存在的混合关系。 单斜晶相表面(111)的X射线衍射强度与立方相的表面(111)的X射线衍射强度或I(111)/ I(111)的比例在 0.05〜0.40之间的范围,以及通过将烧结的氧化锆材料加热并保持在200℃至300℃之间的温度范围内引起的X射线衍射强度比值减去先前的 X射线衍射强度在-0.05至+0.10之间。