公开(公告)号：US06635162B2

公开(公告)日：2003-10-21

申请号：US09397931

申请日：1999-09-17

申请人： Satoshi Sugaya ,  Norihiko Nadanami ,  Noboru Ishida ,  Takafumi Oshima

发明人： Satoshi Sugaya ,  Norihiko Nadanami ,  Noboru Ishida ,  Takafumi Oshima

IPC分类号： G01N27407

CPC分类号： G01N27/417

摘要： A gas sensor having a laminate structure composed of thin sheets of solid electrolyte and including a cavity portion 21 and an oxygen concentration cell 5. The oxygen concentration in the cavity portion 21 is held constant. The oxygen concentration cell 5 includes an active electrode 12 having a relatively high catalytic capability with respect to NOx or combustible gas and an inner common electrode 13/15 (serving as an inactive electrode and an oxygen-concentration-sensing electrode) having a relatively low catalytic capability with respect to NOx or combustible gas. The oxygen concentration cell 5 is disposed in the gas sensor so as to be exposed to the interior of the cavity portion 21. The concentration of NOx or combustible gas is determined based on an electromotive force (of the order of mV) generated between the active electrode 12 and the inner common electrode 13/15 by a concentration cell effect.

摘要翻译： 具有由固体电解质薄片构成的层叠结构的气体传感器，包括空腔部21和氧浓度电池5.空腔部21中的氧浓度保持恒定。 氧浓度单元5包括相对于NOx或可燃性气体具有相对较高的催化能力的有源电极12和具有相对低的可燃气体的内部公共电极13/15（用作非活性电极和氧浓度感测电极） 相对于NOx或可燃气体的催化能力。 氧气浓度单元5设置在气体传感器中以暴露于空腔部分21的内部。NOx或可燃气体的浓度基于在活性物质之间产生的电动势（大约mV） 电极12和内部公共电极13/15。

公开(公告)号：US06338783B1

公开(公告)日：2002-01-15

申请号：US09448441

申请日：1999-11-24

申请人： Ryuji Inoue ,  Shoji Kitanoya ,  Tomohiro Fuma ,  Kenji Kato ,  Takafumi Oshima

发明人： Ryuji Inoue ,  Shoji Kitanoya ,  Tomohiro Fuma ,  Kenji Kato ,  Takafumi Oshima

IPC分类号： G01N27407

CPC分类号： G01N27/417

摘要： A gas sensor which can detect the concentration of a combustible gas component in a measurement gas with high accuracy even when the oxygen concentration of the measurement gas or the element temperature changes and which has an excellent response in detecting the combustible gas component is disclosed. In a gas sensor 1, the oxygen concentration of a measurement gas is adjusted to a predetermined level within a first processing space 9 through operation of a first oxygen pump element 3. The measurement gas having an adjusted oxygen concentration is then introduced into a second processing space 10, where a combustible gas component is burned through the assistance of electrodes 16 and 17 functioning as oxidation catalyst sections. Constant voltage is applied to a combustible gas component concentration detection element 5. In this state, when the amount of oxygen changes due to the combustion of the combustible gas component, the output current of the combustible gas component concentration detection element 5 changes with change in the amount of oxygen. Therefore, information regarding the combustible gas component concentration of the original measurement gas can be obtained from the value of the output current. Further, oxygen required to burn the combustible gas component within the second processing space 10 is supplemented by a second oxygen pump element 6. Unlike conventional apparatuses, no feedback system is used, and a variation in the concentration of the combustible gas component appears directly as a variation in the current of the combustible gas component concentration detection element 5. Therefore, a high detection response is obtained.

摘要翻译： 公开了一种气体传感器，其即使在测量气体或元件温度的氧浓度变化并且在检测可燃气体成分时具有优异的响应性的情况下也可以高精度地检测测量气体中的可燃气体成分的浓度。 在气体传感器1中，测量气体的氧浓度通过第一氧气泵元件3的操作在第一处理空间9内被调节到预定水平。然后将具有调节氧浓度的测量气体引入第二处理 空间10，其中通过用作氧化催化剂部分的电极16和17的帮助燃烧可燃气体组分。 恒定电压被施加到可燃气体成分浓度检测元件5上。在这种状态下，当由于可燃性气体成分的燃烧而导致氧气的变化时，可燃性气体成分浓度检测元件5的输出电流随着 氧气量。 因此，可以从输出电流的值获得关于原始测量气体的可燃气体成分浓度的信息。 此外，在第二处理空间10内燃烧可燃气体成分所需的氧被第二氧气泵元件6补充。与常规装置不同，不使用反馈系统，并且可燃气体组分的浓度的变化直接作为 可燃性气体成分浓度检测元件5的电流的变化。因此，获得高检测响应。

公开(公告)号：US06337009B1

公开(公告)日：2002-01-08

申请号：US09523198

申请日：2000-03-10

申请人： Norihiko Nadanami ,  Takafumi Oshima ,  Hiroki Fujita ,  Ryuji Inoue

发明人： Norihiko Nadanami ,  Takafumi Oshima ,  Hiroki Fujita ,  Ryuji Inoue

IPC分类号： G01N27407

CPC分类号： G01N27/4074 ,  G01N33/005

摘要： A gas sensor comprising a proton-conductive layer 5 formed of a polymer electrolyte; first and second electrodes 3 and 4 disposed in contact with the proton-conductive layer 5 and having a function of dissociating hydrogen; a gas-diffusion-rate limiting layer 2 disposed between a measurement gas atmosphere and the first electrode 3 and adapted to diffuse the gas under measurement to the first electrode 3 in a diffusion-rate limited state; and a dense support 1 supporting these elements. Hydrogen gas having reached the first electrode 3 via the gas-diffusion-rate limiting layer 2 is dissociated into protons by virtue of the catalytic action of Pt contained in the electrode and the voltage applied to the first electrode 3, and the generated protons are pumped to the second electrode 4 via the proton-conductive layer 5 and are converted to hydrogen gas, which diffuses into the measurement gas atmosphere. When the applied voltage is sufficiently high, saturation current flows between the first and second electrodes 3 and 4, and the magnitude of the saturation current varies in proportion to the hydrogen gas concentration of the gas under measurement. A hydrogen gas sensor which operates at low temperature in a hydrogen-rich atmosphere, and which can accurately measure hydrogen gas concentration of a fuel gas of a fuel cell, is thereby provided.

摘要翻译： 一种气体传感器，包括由聚合物电解质形成的质子传导层5; 设置成与质子传导层5接触并具有解离氢的功能的第一和第二电极3和4; 设置在测量气体气氛和第一电极3之间并适于以扩散速率限制状态将测量中的气体扩散到第一电极3的气体扩散限制层2; 以及支撑这些元件的致密支撑件1。 通过气体扩散限制层2到达第一电极3的氢气由于电极中包含的Pt的催化作用和施加到第一电极3的电压而被解离成质子，所产生的质子被泵送 通过质子传导层5向第二电极4转移，并将其转化为扩散到测量气体气氛中的氢气。 当施加的电压足够高时，在第一和第二电极3和4之间流过饱和电流，并且饱和电流的大小与被测气体的氢气浓度成比例地变化。 由此，能够在富氢气氛中在低温下工作，能够精确地测定燃料电池的燃料气体的氢气浓度的氢气传感器。

公开(公告)号：US06337006B1

公开(公告)日：2002-01-08

申请号：US09499359

申请日：2000-02-08

申请人： Hiroki Fujita ,  Ryuji Inoue ,  Takafumi Oshima

发明人： Hiroki Fujita ,  Ryuji Inoue ,  Takafumi Oshima

IPC分类号： G01N27406

CPC分类号： C04B35/01 ,  G01N27/4073

摘要： Disclosed is an LaGaO3 sintered body which comprises lanthanum, gallium, oxygen and at least one of other elements, and has at least three crystal phases of different composition formula.

摘要翻译： 公开了一种LaGaO 3烧结体，其包含镧，镓，氧和至少一种其它元素，并且具有不同组成式的至少三个结晶相。

公开(公告)号：US6153072A

公开(公告)日：2000-11-28

申请号：US150295

申请日：1998-09-09

申请人： Ryuji Inoue ,  Shoji Kitanoya ,  Kenji Kato ,  Tomohiro Fuma ,  Takafumi Oshima

发明人： Ryuji Inoue ,  Shoji Kitanoya ,  Kenji Kato ,  Tomohiro Fuma ,  Takafumi Oshima

IPC分类号： G01N27/419 ,  G01N27/416 ,  G01N27/417 ,  G01N27/407

CPC分类号： G01N27/417

摘要： A gas sensor 1 including a first processing space 9; a first gas passage 11; a second processing space 10; a second gas passage 13; an oxygen concentration detection element 4; a first oxygen pumping element 3 adapted to reduce the oxygen concentration of exhaust gas introduced into the first processing space 9 within a range such that a water vapor contained in the measurement gas is not substantially decomposed; an oxygen catalyst section 16; and a combustible gas component concentration information generation/output section 5. Also disclosed is a gas sensor system including the above gas sensor and first oxygen pumping operation control means for adjusting the oxygen concentration of the measurement gas introduced into the first processing space within a range such that water vapor contained in the measuring gas is not substantially decomposed.

摘要翻译： 一种气体传感器1，包括第一处理空间9; 第一气体通道11; 第二处理空间10; 第二气体通道13; 氧浓度检测元件4; 第一氧气抽吸元件3，其适于在被包含在测量气体中的水蒸气基本上不分解的范围内减少引入到第一处理空间9中的废气的氧浓度; 氧催化剂部分16; 以及可燃气体成分浓度信息生成/输出部5.还公开了一种气体传感器系统，其包括上述气体传感器和第一氧气抽运运转控制装置，用于将导入到第一处理空间的测量气体的氧浓度调整到一定范围内 使得包含在测量气体中的水蒸气基本上不分解。

公开(公告)号：US6071393A

公开(公告)日：2000-06-06

申请号：US866452

申请日：1997-05-30

申请人： Takafumi Oshima ,  Masashi Ando ,  Noboru Ishida ,  Satoshi Sugaya ,  Norihiko Nadanami

发明人： Takafumi Oshima ,  Masashi Ando ,  Noboru Ishida ,  Satoshi Sugaya ,  Norihiko Nadanami

IPC分类号： G01N27/407 ,  G01N33/00

CPC分类号： G01N27/4074 ,  G01N27/419

摘要： A small-sized inexpensive nitrogen oxide concentration sensor capable of measuring the concentration of the nitrogen oxide in a measuring gas to a high accuracy. A first oxygen pumping cell, an oxygen concentration measuring cell and a second oxygen pumping cell are formed in different solid electrolyte layers of zirconia and electrodes of oxygen concentration measuring cell are isolated from electrodes of the oxygen pumping cells by insulating film.

摘要翻译： 一种能够以高精度测量测量气体中的氮氧化物的浓度的小型便宜的氮氧化物浓度传感器。 在氧化锆的不同的固体电解质层中形成第一氧气泵浦单元，氧浓度测量单元和第二氧气泵浦单元，并且通过绝缘膜将氧浓度测量单元的电极与氧气泵浦单元的电极隔离。

公开(公告)号：US5989624A

公开(公告)日：1999-11-23

申请号：US134047

申请日：1998-08-14

申请人： Masahito Kida ,  Ryuji Inoue ,  Takafumi Oshima

发明人： Masahito Kida ,  Ryuji Inoue ,  Takafumi Oshima

IPC分类号： G01N27/416 ,  G01N27/407 ,  G01N27/419 ,  B05D5/12

CPC分类号： G01N27/4075 ,  G01N27/4074

摘要： There is described a gas-component concentration sensor, a method of using the sensor, and a method of manufacturing a particular electrode of the sensor, wherein the sensor comprises:a first measurement chamber, an oxygen partial-pressure detection electrode in the first measurement chamber, a first oxygen-ion pump cell within and outside the first measurement such that in response to a voltage applied between the pair electrodes the cell pumps out oxygen to an extent such that a gas component such as NO.sub.x partially decomposes in said first measurement chamber in an amount of not more than 40 wt. % of the gas component present;a second measurement chamber into which the measurement gas is introduced from the first measurement chamber, a second oxygen pump cell having a pair of electrodes such that in response to a voltage applied therebetween the second oxygen-ion pump cell decomposes the gas component within the second measurement chamber;wherein the pair of electrodes of the first oxygen ion pump cell the electrode provided inside first measurement chamber includes fine particles having a function of suppressing dissociation of the gas component that are formed on and carried by a first constituent component of the electrode.

摘要翻译： 描述了气体成分浓度传感器，使用传感器的方法以及制造传感器的特定电极的方法，其中传感器包括：第一测量室，第一测量中的氧分压检测电极 在第一测量中和之外的第一氧离子泵单元，使得响应于在所述一对电极之间施加的电压，所述电池将氧气排出到使得诸如NOx之类的气体成分在所述第一测量室中部分分解的程度 其用量不超过40wt。 存在的气体成分的％ 第二测量室，其中测量气体从第一测量室引入其中;第二氧泵单元，具有一对电极，使得响应于其间施加的电压，第二氧离子泵电池在第二测量室内分解第二氧离子泵室内的气体组分 测量室; 其中，设置在第一测量室内的电极的第一氧离子泵电池的一对电极包括具有抑制在电极的第一构成成分上形成并承载的气体成分的离解功能的微粒。

公开(公告)号：US5578895A

公开(公告)日：1996-11-26

申请号：US639002

申请日：1996-04-26

申请人： Takafumi Oshima

发明人： Takafumi Oshima

IPC分类号： H01T13/16 ,  H01T13/20 ,  H01T13/39 ,  H01T21/02

CPC分类号： H01T13/39 ,  H01T21/02

摘要： In a spark plug which has an electrode metal made from a heat- and erosion-resistant nickel alloy whose front end has a noble metal tip made of iridium or ruthenium, the electrode metal has a thermal conductivity of at least 30 W/m.multidot.K so as to avoid rapid temperature rise in the noble metal tip to thereby minimize oxidation-evaporation and attendant wear thereof.

摘要翻译： 在具有由耐热和耐腐蚀镍合金制成的电极金属的火花塞中，其前端具有由铱或钌制成的贵金属尖端，所述电极金属具有至少30W / m×K的热导率，以便 以避免贵金属电极尖端的温度升高，从而使氧化蒸发和其磨损最小化。

公开(公告)号：US5461275A

公开(公告)日：1995-10-24

申请号：US277993

申请日：1994-07-20

申请人： Takafumi Oshima

发明人： Takafumi Oshima

IPC分类号： H01T13/20 ,  H01T13/39 ,  H01T21/02 ,  H01T1/22

CPC分类号： H01T13/39 ,  H01T21/02

摘要： In a spark plug having a nickel-based electrode whose front end has a firing tip made from a ruthenium- or iridium-based metal in which an oxide of a rare earth metal group is dispersed, the firing tip is welded to the electrode by a solidified alloy layer having a component of the electrode and a component of the firing tip. The firing tip contains the oxide of the rare earth metal group in a range of 5.about.15% by volume (V), and an average grain size (D) of the oxide is in a range of 0.05.about.3.0 .mu.m with a quantitative relationship as D.ltoreq.-0.34V+5.1.

摘要翻译： 在具有镍基电极的火花塞中，其前端具有由其中分散有稀土金属组的氧化物的钌或铱系金属制成的烧制尖端，所述烧制尖端通过 具有电极的成分和烧成尖端的成分的固化合金层。 烧成尖端含有5体积％（V）的稀土金属组的氧化物，氧化物的平均粒径（D）在0.05微米的范围内，定量 关系为D

公开(公告)号：US5347193A

公开(公告)日：1994-09-13

申请号：US960113

申请日：1992-10-13

申请人： Takafumi Oshima ,  Kazuya Iwata ,  Tsutomu Okayama

发明人： Takafumi Oshima ,  Kazuya Iwata ,  Tsutomu Okayama

IPC分类号： H01T13/16 ,  H01T13/20 ,  H01T13/39

CPC分类号： H01T13/39

摘要： In a center electrode for a spark plug, the center electrode is made of a heat-conductor core cladded with a nickel-alloyed metal. A recess is provided on the front end surface of the nickel-alloyed matrix and the columnar tip is made of a precious metal and fit in the recess in such a manner that a front end of the tip protracts from the recess. The outer surface of the tip is welded to an inner surface of the recess. The dimensional relationship of the components of the spark plug A, B, C, D, E, F and G is as follows: 0.3 mm.ltoreq.A.ltoreq.0.8 mm, 1.2A.ltoreq.B.ltoreq.3A, 0.1 mm.ltoreq.(C-A)/2.ltoreq.0.5 mm, D.ltoreq.(C-A)/2, E.ltoreq.B/4, 0 mm.ltoreq.F.ltoreq.0.5 mm and A/5.ltoreq.G.ltoreq.A/2, where A: a diameter of the columnar tip, B: a length of the columnar tip, C: a diameter of a front end of the nickel-alloyed metal, D: a length of a front end of the nickel-alloyed metal, E: a length of the front end of the tip which is protracted from the recess, F: a distance between a rear end of the tip and a front end of the heat-conductor core, G: a distance of a welding portion penetrated from the outer surface of the tip into the inner surface of the recess.

摘要翻译： 在用于火花塞的中心电极中，中心电极由包含镍合金金属的导热芯组成。 在镍合金基体的前端面上设有凹部，柱状末端由贵金属制成，并以这样的方式配合在凹部内，使得尖端的前端从凹部伸出。 尖端的外表面焊接到凹部的内表面。 火花塞A，B，C，D，E，F和G的部件的尺寸关系如下：0.3mm A = 0.8mm，1.2A