公开(公告)号：US5766434A

公开(公告)日：1998-06-16

申请号：US797652

申请日：1997-01-31

申请人： Namitsugu Fujii ,  Hiromi Sano ,  Yasumichi Hotta ,  Naoto Miwa ,  Motoaki Satou

发明人： Namitsugu Fujii ,  Hiromi Sano ,  Yasumichi Hotta ,  Naoto Miwa ,  Motoaki Satou

IPC分类号： G01N27/407 ,  G01N27/26

CPC分类号： G01N27/4075 ,  G01N27/4077

摘要： An oxygen concentration detecting device comprises a solid electrolyte body, inner and outer electrodes formed on the opposite sides of the solid electrolyte body, and a protective layer formed on the outer electrode and comprised of coarse particles and fine particles mutually bonded through an inorganic binder while substantially keeping the original forms of the both types of particles. A ratio of an average particle size, RB, of the coarse particles to an average particle size, RA, of the fine particles of 30:1 or above, and a content, WA, of the fine particles in the protective layer based on the total content, W, of the content, WA, of the fine particles and the content, WB, of the coarse particles on the weight basis is in the range of 15 to 80 %. A method for fabricating the detecting device having such a protective layer as set out above is also described.

摘要翻译： 氧浓度检测装置包括固体电解质体，形成在固体电解质体的相对侧的内部和外部电极，以及形成在外部电极上的保护层，其由通过无机粘合剂相互粘合的粗粒子和微粒组成， 基本保持两种类型颗粒的原始形式。 基于上述保护层中的微粒的粗粒子的平均粒径RB与微粒的平均粒径RA（30:1以上）和含量WA的比例 粗颗粒的含量W W，微粒的含量W和重量的含量WB在15〜80％的范围内。 还描述了制造具有上述保护层的检测装置的方法。

公开(公告)号：US5766672A

公开(公告)日：1998-06-16

申请号：US704927

申请日：1996-08-28

申请人： Yasumichi Hotta ,  Hiromi Sano ,  Namitsugu Fujii ,  Naoto Miwa

发明人： Yasumichi Hotta ,  Hiromi Sano ,  Namitsugu Fujii ,  Naoto Miwa

IPC分类号： G01N27/409 ,  G01N27/407 ,  B05D5/12

CPC分类号： G01N27/4075

摘要： An oxygen concentration detector element 2 includes a cup-shaped solid electrolyte 20 with an inside chamber 25 opened at one end and closed at the other end. An external electrode 21 is formed on an outer surface of solid electrolyte 20 by dipping solid electrolyte 20 in first chemical plating liquid 81, while an internal electrode 22 is formed on an inner surface of solid electrolyte 20 by introducing second chemical plating liquid 82 into inside chamber 25. First, in an injecting step, an injection needle 11 is inserted into inside chamber 25 and second chemical plating liquid 82 is introduced into inside chamber 25 via injection needle 11, and then injection needle 11 is pulled out of inside chamber 25. Next, in a plating step, internal electrode 22 is formed on the inner surface of inside chamber 25 using second chemical plating liquid 82. Then, in a discharging step, residual second chemical plating liquid 82 is discharged from inside chamber 25.

摘要翻译： 氧浓度检测元件2包括杯状固体电解质20，其内侧室25在一端开口并在另一端封闭。 通过在第一化学镀液81中浸渍固体电解质20而在固体电解质20的外表面上形成外部电极21，而在固体电解质20的内表面上形成内部电极22，通过将第二化学镀液82引入到内部电极 首先，在注射步骤中，将注入针11插入内部腔25中，并且将第二化学镀液82经由注射针11引入到内部腔25内，然后将注射针11从内部腔25中拉出。 接着，在电镀工序中，使用第二化学镀液82在内部室25的内表面上形成内部电极22.然后，在排出工序中，残留的第二化学镀液82从内部室25排出。

公开(公告)号：US06174489B1

公开(公告)日：2001-01-16

申请号：US09140422

申请日：1998-08-26

申请人： Kiyomi Kobayashi ,  Naoto Miwa ,  Toshitaka Saito ,  Hiromi Sano ,  Namitsugu Fujii

发明人： Kiyomi Kobayashi ,  Naoto Miwa ,  Toshitaka Saito ,  Hiromi Sano ,  Namitsugu Fujii

IPC分类号： C07B3332

CPC分类号： G01N27/4073

摘要： A method for manufacturing an oxygen sensor unit of the type which includes at least a shaped body of a solid electrolyte, an inner electrode provided on an inside surface of the shaped body and exposed to a reference gas, an outer electrode provided on an outside surface of the shaped body and exposed to a gas to be measured, and a porous protective layer covering the outer electrode and a portion of the shaped body adjoining to said outer electrode wherein the solid electrolyte is made of a mixture of zirconia and a stabilizer therefor and is constituted of a sintered product of partially stabilized zirconia. The method is characterized in that the partially stabilized, sintered zirconia is obtained according to a high temperature sintering process which includes at least the step of sintering the mixture at a temperature of 1200° C. or over for a duration of 2 to 6 hours wherein a value obtained by integrating a variation in the sintering temperature with the duration in the sintering process is in the range of 300 to 1500° C.·hour.

摘要翻译： 一种制造氧传感器单元的方法，该氧传感器单元至少包括固体电解质的成形体，设置在成形体的内表面上并暴露于参考气体的内电极，设置在外表面上的外电极 并暴露于要测量的气体，以及覆盖外电极的多孔保护层和与所述外电极相邻的成形体的一部分，其中固体电解质由氧化锆及其稳定剂的混合物制成， 由部分稳定化的氧化锆的烧结体构成。 该方法的特征在于，部分稳定的烧结氧化锆根据高温烧结方法获得，其至少包括在1200℃或更高温度下烧结混合物2至6小时的步骤，其中 通过将烧结温度的变化与烧结过程中的持续时间相结合而获得的值在300〜1500℃的范围内。

公开(公告)号：US5707503A

公开(公告)日：1998-01-13

申请号：US549209

申请日：1995-10-27

申请人： Yasumichi Hotta ,  Hiromi Sano ,  Toshitaka Saito ,  Masatoshi Suzuki ,  Naoto Miwa

发明人： Yasumichi Hotta ,  Hiromi Sano ,  Toshitaka Saito ,  Masatoshi Suzuki ,  Naoto Miwa

IPC分类号： G01N27/409 ,  G01N27/407 ,  G01N27/26

CPC分类号： G01N27/4075

摘要： According to the present invention, an oxygen sensor element includes a solid electrolyte having a side surface at one side thereof, the side surface being contactable with a gas to be measured, a skeletal electrode provided on the side surface and having a plurality of pore portions, each of the pore portions passing through the skeletal electrode up to the solid electrolyte, and a reactive electrode made of a porous film and provided in each of the pore portions, a thickness of the porous film being smaller than that of said skeletal electrode. An area percentage (SH/SZ) which is a ratio of a total area (SH) of the reactive electrode to a total area (SZ) of the skeletal electrode and the reactive electrode is in a range from 10 to 50%, an average area (SA) of the pore portions is 100 .mu.m.sup.2 or less, a film thickness of the skeletal electrode is in a range from 1.5 to 4 .mu.m, and the film thickness of the reactive electrode is in a range from 0.6 to 1.5 .mu.m. The oxygen sensor element is superior in the heat resistance characteristics and the response characteristics.

摘要翻译： 根据本发明，氧传感器元件包括固体电解质，其一侧具有侧表面，侧表面可与待测气体接触，骨架电极设置在侧表面上并具有多个孔部分 每个孔部分通过骨架电极直到固体电解质，以及由多孔膜制成的反应性电极，并设置在每个孔部分中，多孔膜的厚度小于所述骨架电极的厚度。 作为骨架电极和反应性电极的反应电极的总面积（SH）与总面积（SZ）的比的面积百分比（SH / SZ）在10〜50％的范围内，平均 孔部的面积（SA）为100μm以下，骨架电极的膜厚在1.5〜4μm的范围内，反应电极的膜厚在0.6〜1.5μm的范围内 m。 氧传感器元件的耐热特性和响应特性优异。

公开(公告)号：US6055972A

公开(公告)日：2000-05-02

申请号：US886063

申请日：1997-06-30

申请人： Masaya Fujimoto ,  Minoru Ohta ,  Makoto Nakae ,  Isao Watanabe ,  Naoto Miwa ,  Hiromi Sano ,  Masahiro Shibata

发明人： Masaya Fujimoto ,  Minoru Ohta ,  Makoto Nakae ,  Isao Watanabe ,  Naoto Miwa ,  Hiromi Sano ,  Masahiro Shibata

IPC分类号： G01N27/406 ,  G01N27/416 ,  F02D41/30

CPC分类号： G01N27/4067

摘要： An air-fuel ratio sensor of a limit current type is used for an air-fuel ratio feedback control. When the air-fuel ratio sensor is in a semi-activated state, the air-fuel ratio sensor is driven into an electromotive force generating mode by a current externally applied thereto thereby to shift an electromotive force changing point so that an air-fuel ratio at which the electromotive force changes stepwisely is shifted from the stoichiometric ratio point to a lean zone. When the air-fuel ratio sensor is in a completely activated state, the air-fuel ratio sensor is applied with a voltage to produce a limit current varying with an air-fuel ratio so that a feedback control is performed based on the advanced control theory by using a linear current output characteristics.

摘要翻译： 用于空燃比反馈控制的极限电流型的空燃比传感器。 当空燃比传感器处于半激活状态时，通过外部施加的电流将空燃比传感器驱动成电动势产生模式，从而使电动势变化点移动，使得空燃比传感器的空燃比 电动势逐步变化的位置从化学计量比点偏移到贫带。 当空燃比传感器处于完全启动状态时，空燃比传感器被施加电压以产生随空燃比变化的极限电流，从而基于先进控制理论进行反馈控制 通过使用线性电流输出特性。

公开(公告)号：US06951601B1

公开(公告)日：2005-10-04

申请号：US08838910

申请日：1997-04-11

申请人： Akio Tanaka ,  Naoto Miwa ,  Toshitaka Saito ,  Hiromi Sano ,  Kazunori Suzuki ,  Masaya Fujimoto

发明人： Akio Tanaka ,  Naoto Miwa ,  Toshitaka Saito ,  Hiromi Sano ,  Kazunori Suzuki ,  Masaya Fujimoto

IPC分类号： G01N27/41 ,  G01N27/406 ,  G01N27/407 ,  G01N27/409

CPC分类号： G01N27/4075 ,  G01N27/4067

摘要： The oxygen concentration detector of the present invention includes a sensor element having a solid electrolyte and having an external electrode and an internal electrode provided on the external surface and the internal surface, respectively, and a heater provided adjacent to the internal surface of the sensor element, in which a high-emissivity layer consisting of a material having a high emissivity is provided on the internal surface of the sensor element and/or the surface of the heater.

摘要翻译： 本发明的氧浓度检测器具有固体电解质的传感器元件，分别具有设置在外表面和内表面上的外部电极和内部电极，以及设置在传感器元件的内表面附近的加热器 其中在传感器元件的内表面和/或加热器的表面上设置由具有高发射率的材料构成的高发射率层。

公开(公告)号：US5935399A

公开(公告)日：1999-08-10

申请号：US792737

申请日：1997-01-31

申请人： Akio Tanaka ,  Naoto Miwa ,  Hiromi Sano ,  Toshitaka Saito ,  Katsuhiro Ishikawa

发明人： Akio Tanaka ,  Naoto Miwa ,  Hiromi Sano ,  Toshitaka Saito ,  Katsuhiro Ishikawa

IPC分类号： G01N27/407

CPC分类号： G01N27/4075

摘要： An air-fuel ratio sensing element comprises a cup-shaped solid electrolyte with one end opened and the other end closed, an external electrode provided on an outer wall surface of the solid electrolyte so as to be exposed to measured gas, and an internal electrode provided on an inner wall surface of the solid electrolyte in a confronting relationship to the external electrode. A first insulating layer, made of a gas-permeable and nonconductive porous material, is provided on the external electrode at least in a region used for detecting of an air-fuel ratio. A second insulating layer is provided outside the first insulating layer and, a heater layer as provided between the first insulating layer and the second insulating layer.

摘要翻译： 空燃比检测元件包括一端敞开而另一端闭合的杯形固体电解质，设置在固体电解质的外壁表面上以暴露于测量气体的外部电极，以及内部电极 以与外部电极相对的关系设置在固体电解质的内壁表面上。 至少在用于检测空燃比的区域中，在外部电极上设置由透气且不导电的多孔材料制成的第一绝缘层。 第二绝缘层设置在第一绝缘层的外侧，以及设置在第一绝缘层和第二绝缘层之间的加热器层。

公开(公告)号：US5948225A

公开(公告)日：1999-09-07

申请号：US861226

申请日：1997-05-21

申请人： Toru Katafuchi ,  Kiyomi Kobayashi ,  Naoto Miwa ,  Hiromi Sano ,  Toshitaka Saito

发明人： Toru Katafuchi ,  Kiyomi Kobayashi ,  Naoto Miwa ,  Hiromi Sano ,  Toshitaka Saito

IPC分类号： G01N27/409 ,  G01N27/407

CPC分类号： G01N27/4075

摘要： An oxygen sensor element includes a solid electrolyte having cavities on a surface thereof and an electrode formed on the surface of the solid electrolyte. In a method of producing the oxygen sensor element, a solution containing a noble metal compound for nucleus formation is first applied to an electrode forming portion of the solid electrolyte to form a coating film. Then, the coating film is heat-treated to form a nucleus forming portion where noble metal nuclei are deposited. Subsequently, metal plating is applied to the nucleus forming portion to form a plating film deeply entering the cavities. Thereafter, the plating film is burned to form the electrode deeply entering the cavities.

摘要翻译： 氧传感器元件包括在其表面上具有空腔的固体电解质和形成在固体电解质表面上的电极。 在制造氧传感器元件的方法中，首先将含有形成核的贵金属化合物的溶液施加到固体电解质的电极形成部分以形成涂膜。 然后，对涂膜进行热处理，形成析出贵金属核的成核部。 随后，对核形成部分施加金属电镀以形成深入到空腔中的镀膜。 此后，电镀膜被燃烧以形成深入空腔的电极。

公开(公告)号：US06254926B1

公开(公告)日：2001-07-03

申请号：US09360147

申请日：1999-07-26

申请人： Toru Katafuchi ,  Kiyomi Kobayashi ,  Naoto Miwa ,  Hiromi Sano ,  Toshitaka Saito

发明人： Toru Katafuchi ,  Kiyomi Kobayashi ,  Naoto Miwa ,  Hiromi Sano ,  Toshitaka Saito

IPC分类号： B05D512

CPC分类号： G01N27/4075

摘要： An oxygen sensor element includes a solid electrolyte having cavities on a surface thereof and an electrode formed on the surface of the solid electrolyte. In a method of producing the oxygen sensor element, a solution containing a noble metal compound for nucleus formation is first applied to an electrode forming portion of the solid electrolyte to form a coating film. Then, the coating film is heat-treated to form a nucleus forming portion where noble metal nuclei are deposited. Subsequently, metal plating is applied to the nucleus forming portion to form a plating film deeply entering the cavities. Thereafter, the plating film is burned to form the electrode deeply entering the cavities.

摘要翻译： 氧传感器元件包括在其表面上具有空腔的固体电解质和形成在固体电解质表面上的电极。 在制造氧传感器元件的方法中，首先将含有形成核的贵金属化合物的溶液施加到固体电解质的电极形成部分以形成涂膜。 然后，对涂膜进行热处理，形成析出贵金属核的成核部。 随后，对核形成部分施加金属电镀以形成深入到空腔中的镀膜。 此后，电镀膜被燃烧以形成深入空腔的电极。

公开(公告)号：US6110348A

公开(公告)日：2000-08-29

申请号：US92647

申请日：1998-06-09

申请人： Tomio Sugiyama ,  Naoto Miwa ,  Masahiro Shibata, deceased ,  Hiromi Sano

发明人： Tomio Sugiyama ,  Naoto Miwa ,  Masahiro Shibata, deceased ,  Hiromi Sano

IPC分类号： G01N27/419 ,  G01N27/407 ,  G01N27/416 ,  G01N27/26

CPC分类号： G01N27/407

摘要： A main body of a NOx sensor has a sensor cell and defines a reference gas chamber and a sample gas chamber therein. The sample gas chamber has a wall formed by a solid electrolytic substrate having an oxygen ion conductivity. The sensor cell is disposed between the reference gas chamber and the sample gas chamber for detecting a concentration of a NOx gas. A pump cell body of the NOx sensor has a surface facing to the sample gas chamber and has a pump cell for introducing and exhausting an oxygen gas to and from the sample gas chamber. In manufacturing this NOx sensor, the main body and the pump cell body are fabricated individually as separate items. The main body and the pump cell body are sintered independently. Then, the main body and the pump cell body are assembled into to the NOx sensor.

摘要翻译： NOx传感器的主体具有传感器单元并且在其中限定了参考气体室和样品气体室。 样品气室具有由具有氧离子传导性的固体电解质基材形成的壁。 传感器单元设置在参考气体室和样本气体室之间，用于检测NOx气体的浓度。 NOx传感器的泵电池体具有面向样品气体室的表面，并且具有用于将氧气引入和排出到样品气体室的泵室。 在制造该NOx传感器时，主体和泵电池体单独制造成单独的物品。 主体和泵电池体独立烧结。 然后，将主体和泵电池体组装到NOx传感器中。