公开(公告)号：US06660145B2

公开(公告)日：2003-12-09

申请号：US09960980

申请日：2001-09-25

申请人： Yasumichi Hotta ,  Hiroshi Sugino ,  Tooru Katafuchi ,  Namitsugu Fujii

发明人： Yasumichi Hotta ,  Hiroshi Sugino ,  Tooru Katafuchi ,  Namitsugu Fujii

IPC分类号： G01N27407

CPC分类号： G01N27/4077

摘要： An oxygen sensor element is provided which may be used in an oxygen sensor designed to measure the concentration of oxygen contained in exhaust gasses of an automotive internal combustion engine. The gas sensor element includes a solid electrolyte body, a target gas electrode, a reference gas electrode, and a catalytic layer formed over the target gas electrode. The catalytic layer is made of heat resisting ceramic grains which hold thereon catalytic metal grains whose average grain size is 0.3 to 2.0 &mgr;m, a weight of catalytic metal grains per unit area of the catalytic layer, as defined by projecting the target gas electrode on a plane, is 10 to 200 &mgr;g/cm2. This facilitates the reaction of exhaust gasses such as H2, NOx, and HC with O2 over the target gas electrode, thus resulting in improved accuracy of a sensor output over a wide temperature range.

摘要翻译： 提供氧传感器元件，其可用于设计用于测量汽车内燃机排气中所含氧气浓度的氧传感器中。 气体传感器元件包括固体电解质体，目标气体电极，参考气体电极和形成在目标气体电极上的催化剂层。 催化剂层由耐热陶瓷颗粒制成，其中保持了平均粒径为0.3-2.0μm的催化金属颗粒，催化剂层每单位面积催化金属颗粒的重量，如目标气体电极投影在 平面为10〜200mug / cm 2。 这有助于在目标气体电极上使诸如H 2，NO x和HC之类的废气与O 2的反应，从而在较宽的温度范围内提高传感器输出的精度。

公开(公告)号：US06562212B2

公开(公告)日：2003-05-13

申请号：US09916344

申请日：2001-07-30

申请人： Tooru Katafuchi ,  Yasumichi Hotta ,  Namitsugu Fujii

发明人： Tooru Katafuchi ,  Yasumichi Hotta ,  Namitsugu Fujii

IPC分类号： G01N27407

CPC分类号： G01N27/4075

摘要： A gas sensor element is provided which is used in a gas sensor such as an oxygen sensor. The gas sensor element includes a solid electrolyte body, a target gas electrode provided on a surface of the solid electrolyte body so as to be exposed to a gas to be measured, and a reference gas electrode provided on a surface of the solid electrolyte body so as to be exposed to a reference gas. Each of the target gas electrode and the reference gas electrode is made up of a plurality of crystal grains defined by grain boundaries. The total length of the grain boundaries in each of the target gas electrode and the reference gas electrode is 1000 &mgr;m or more in a surface area of 1000 &mgr;m2. This ensures a sufficient degree of diffusion of the gasses in the target and reference gas electrodes, thereby providing a rapid response rate to the gas sensor element.

摘要翻译： 提供了一种气体传感器元件，其用于诸如氧传感器的气体传感器中。 气体传感器元件包括固体电解质体，设置在固体电解质体的表面上以暴露于被测量气体的目标气体电极和设置在固体电解质体表面上的参考气体电极， 以暴露于参考气体。 目标气体电极和参考气体电极由晶界限定的多个晶粒构成。 在目标气体电极和参考气体电极中的每个目标气体电极的总长度在1000mum2的表面积中为1000μm以上。 这确保气体在目标和参考气体电极中的充分扩散程度，从而为气体传感器元件提供快速响应速率。

公开(公告)号：US06776895B2

公开(公告)日：2004-08-17

申请号：US10391801

申请日：2003-03-20

申请人： Tooru Katafuchi ,  Yasumichi Hotta ,  Namitsugu Fujii

发明人： Tooru Katafuchi ,  Yasumichi Hotta ,  Namitsugu Fujii

IPC分类号： G01N27407

CPC分类号： G01N27/4075

摘要： A method of manufacturing a gas sensor element which includes a solid electrolyte body, a target gas electrode a reference gas electrode provided on a surface of the solid electrolyte body so as to be exposed to a reference gas and the manufacturing method includes exposing the gas sensor element to a gas atmosphere containing at least one of a hydrocarbon gas, a CO2 gas, and a H2 gas and applying an ac voltage to said target gas electrode and the reference gas electrode. Each of the target gas electrode and the reference gas electrode is made up of a plurality of crystal grains defined by grain boundaries having a total length of 1000 &mgr;m or more in a surface area of 100 &mgr;m2.

摘要翻译： 一种制造气体传感器元件的方法，该气体传感器元件包括固体电解质体，目标气体电极，设置在固体电解质体的表面上以便暴露于参考气体的参考气体电极，并且该制造方法包括使气体传感器 元素连接到包含烃气体，CO 2气体和H 2气体中的至少一种的气体气氛中，并且向所述目标气体电极和参考气体电极施加交流电压。 目标气体电极和参考气体电极由表面积为100mum 2的总长度为1000μm以上的晶界限定的多个晶粒构成。

公开(公告)号：US06849291B2

公开(公告)日：2005-02-01

申请号：US10271534

申请日：2002-10-17

申请人： Gang E ,  Kiyomi Kobayashi ,  Yasumichi Hotta ,  Namitsugu Fujii

发明人： Gang E ,  Kiyomi Kobayashi ,  Yasumichi Hotta ,  Namitsugu Fujii

IPC分类号： G01N27/409 ,  C23C18/08 ,  C23C18/14 ,  C23C18/18 ,  F02B77/08 ,  G01N27/407 ,  B05D5/12

CPC分类号： G01N27/4075 ,  C23C18/08 ,  C23C18/14 ,  C23C18/165

摘要： A gas sensing element has a solid electrolytic body, a reference gas side electrode provided on a surface of the solid electrolytic body so as to be exposed to a reference gas, and a measured gas side electrode provided on another surface of the solid electrolytic body so as to be exposed to a measured gas. A crystal face strength ratio of the measured gas side electrode according to X-ray diffraction is 0.7≦{I(200)/I(111)} or 0.6≦{I(220)/I(111)}.

摘要翻译： 气体感测元件具有固体电解体，设置在固体电解体的表面上以暴露于参考气体的参考气体侧电极和设置在固体电解体的另一个表面上的测量气体侧电极， 暴露于测量的气体。 根据X射线衍射测得的气体侧电极的晶面强度比为0.7 <= {I（200）/ I（111）}或0.6 <= {I（220）/ I（111）}。

公开(公告)号：US06344118B1

公开(公告)日：2002-02-05

申请号：US09130902

申请日：1998-08-07

申请人： Kiyomi Kobayashi ,  Namitsugu Fujii ,  Yasumichi Hotta ,  Hiromi Sano

发明人： Kiyomi Kobayashi ,  Namitsugu Fujii ,  Yasumichi Hotta ,  Hiromi Sano

IPC分类号： G01N2726

CPC分类号： G01N27/4075

摘要： An improved structure of an oxygen sensing element installed in an oxygen sensor designed to measure an oxygen content in gases is provided. The structure includes a cup-shaped solid electrolyte body, an inner electrode, and an outer electrode. The solid electrolyte body has a portion exposed to the gases which has a given length. The inner electrode is formed on an inner wall of the solid electrolyte body and exposed to air. The outer electrode is formed on an outer wall of the solid electrolyte body and exposed to the gases through a protective layer. The oxygen content in the gases is measured based on output signals from the inner and outer electrodes. The outer electrode occupies an area on the outer wall of the solid electrolyte body within a range of 80% of the given length of the gas-exposed portion of the solid electrolyte body and has a thickness ranging from 1.2 to 3.0 &mgr;m. This allows the oxygen sensing element to determine the oxygen content in the gases precisely and to have an improved heat-resistance.

摘要翻译： 提供了安装在氧传感器中的氧传感元件的改进结构，其设计用于测量气体中的氧含量。 该结构包括杯状固体电解质体，内部电极和外部电极。 固体电解质体具有暴露于具有给定长度的气体的部分。 内部电极形成在固体电解质体的内壁上并暴露于空气中。 外电极形成在固体电解质体的外壁上并通过保护层暴露于气体。 基于来自内外电极的输出信号测量气体中的氧含量。 外部电极在固体电解质体的气体暴露部分的给定长度的80％的范围内占据固体电解质体外壁上的区域，并且具有1.2-3.0μm的厚度。 这允许氧气感测元件精确地确定气体中的氧含量并且具有改善的耐热性。

公开(公告)号：US5593558A

公开(公告)日：1997-01-14

申请号：US467144

申请日：1995-06-06

申请人： Hiroshi Sugino ,  Yasumichi Hotta ,  Namitsugu Fujii ,  Masahiro Shibata ,  Hiromi Sano

发明人： Hiroshi Sugino ,  Yasumichi Hotta ,  Namitsugu Fujii ,  Masahiro Shibata ,  Hiromi Sano

IPC分类号： G01N27/407 ,  G01N27/26

CPC分类号： G01N27/4075

摘要： An oxygen concentration detector includes a one-end closed cylindrical oxygen sensing element having an inside electrode, outside electrode provided on the inner side and outer side respectively, an electrode protecting layer made up of ceramics porous member provided further outside the outside electrode, and a trap layer 1 of ceramics porous member having a surface roughness of 20 to 100 .mu.m measured according to a 10 point mean roughness measurement and provided outside the electrode protecting layer is employed. By dipping the to-be-detected gas side surface of an oxygen sensing element into a slurry with coarse heat-resisting metal oxide particles, 2 to 50 .mu.m in average grain size, dispersed, depositing the slurry on the surface of a protective layer of an oxygen sensor element, thereafter drying and baking the deposit, a porous poisonous substance trap layer, 10 to 500 .mu.m thick, is formed. The dipping is performed after a previous degassing and strong stirring of said slurry and the stop of stirring.

摘要翻译： 氧浓度检测器包括：一端封闭的圆柱形氧传感元件，其具有内电极，设置在内侧和外侧的外电极，由设置在外电极外侧的陶瓷多孔体构成的电极保护层，以及 使用根据10点平均粗糙度测量测量并设置在电极保护层外侧的表面粗糙度为20至100μm的陶瓷多孔构件的捕获层1。 通过将氧检测元件的待检测气体侧表面浸入具有粗糙的耐热金属氧化物颗粒的浆料中，平均粒径为2至50μm，分散，将浆料沉积在保护层的表面上 的氧传感器元件，然后干燥和烘烤沉积物，形成10至500μm厚的多孔有害物质捕获层。 在先前脱气并强烈搅拌所述浆料并停止搅拌之后进行浸渍。

公开(公告)号：US06409899B1

公开(公告)日：2002-06-25

申请号：US09511079

申请日：2000-02-23

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

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

IPC分类号： G01N27407

CPC分类号： G01N27/4077

摘要： A sensor element has a solid electrolyte body holding a reference gas side electrode and a measurement gas side electrode on surfaces thereof. The measurement gas side electrode is covered with a porous protective layer including a component as a lead getter, which reacts with lead contained in measurement gas. Accordingly, lead is removed from measurement gas by the protective layer not to be attached to the measurement gas side electrode. As a result, the sensor element can be used in measurement gas containing lead, without deteriorating responsibility and output thereof.

摘要翻译： 传感器元件具有在其表面上保持参考气体侧电极和测量气体侧电极的固体电解质体。 测量气体侧电极被多孔保护层覆盖，该多孔保护层包括与测量气体中所含的铅反应的作为引线吸气剂的部件。 因此，通过不附接到测量气体侧电极的保护层将铅从测量气体中除去。 结果，传感器元件可以用于含铅的测量气体中，而不会降低其责任和输出。

公开(公告)号：US06632338B2

公开(公告)日：2003-10-14

申请号：US09877125

申请日：2001-06-11

申请人： Namitsugu Fujii ,  Motoaki Satou ,  Kiyomi Kobayashi ,  Yasumichi Hotta

发明人： Namitsugu Fujii ,  Motoaki Satou ,  Kiyomi Kobayashi ,  Yasumichi Hotta

IPC分类号： G01N2741

CPC分类号： G01N27/4077

摘要： A second protective layer is a ceramic porous protective layer comprising coarse particles and fine particles structurally arranged in such a manner that interparticle cavities formed between the coarse particles are filled with the fine particles. At least either of the coarse particles and the fine particles contain at least one selected from the group consisting of &ggr;-Al2O3, &thgr;-Al2O3, &dgr;-Al2O3 and solid solution having the same crystal structure as those of &ggr;-Al2O3, &thgr;-Al2O3, &dgr;-Al2O3.

摘要翻译： 第二保护层是包括粗颗粒和细颗粒的陶瓷多孔保护层，其结构地布置成使得在粗颗粒之间形成的颗粒间隙被细颗粒填充。 粗颗粒和细颗粒中的至少任一种含有选自γ-Al 2 O 3，θ-Al 2 O 3，δ-Al 2 O 3和与γ-Al 2 O 3，θ-Al 2 O 3具有相同晶体结构的固溶体中的至少一种 ，Δ-Al2O3

公开(公告)号：US5472591A

公开(公告)日：1995-12-05

申请号：US305712

申请日：1994-09-14

申请人： Toshitaka Saito ,  Namitsugu Fujii ,  Yasumichi Hotta ,  Satoru Nomura ,  Hiromi Sano ,  Masatoshi Suzuki

发明人： Toshitaka Saito ,  Namitsugu Fujii ,  Yasumichi Hotta ,  Satoru Nomura ,  Hiromi Sano ,  Masatoshi Suzuki

IPC分类号： G01N27/409 ,  G01N27/407

CPC分类号： G01N27/4075

摘要： An oxygen concentration detector provides high durability by increasing the thermal stability of coating layers applied to an electrode face thereof. A catalyst layer is formed on an outer surface of an electrode at the analysis gas side of a partition wall made of an ion oxygen conductive ceramic for generating electromotive force according to the difference between the concentration of oxygen in the analysis gas and the concentration of oxygen in the reference gas. The catalyst layer is composed of heat resistant ceramic particles and a particulate metallic catalyst made of platinum, rhodium or the like, supported by the surface of the heat resistant ceramic particles. The catalyst layer is formed so that the catalyst is supported by the heat resistant support particles. The support particles are heat treated to grow to a particle size so that particle growth can be restrained when the support particles are exposed to the exhaust gas from an internal combustion engine. The outside of the electrode of the partition wall is covered with support particles having such heat treated large cohered catalyst particles, and good responsivity of the sensor is thereby maintained.

摘要翻译： 氧浓度检测器通过增加施加到其电极面上的涂层的热稳定性而提供高耐久性。 催化剂层形成在由离子氧传导陶瓷制成的分隔壁的分析气体侧的电极的外表面上，用于根据分析气体中的氧浓度与氧浓度之间的差产生电动势 在参考气体中。 催化剂层由耐热陶瓷颗粒和由耐热陶瓷颗粒的表面支撑的由铂，铑等制成的颗粒状金属催化剂组成。 催化剂层形成为使得催化剂被耐热支撑颗粒支撑。 支撑颗粒被热处理以生长成粒径，使得当载体颗粒暴露于来自内燃机的废气时，可以抑制颗粒生长。 分隔壁的电极的外侧覆盖有具有这种经热处理的大型粘结催化剂颗粒的支撑颗粒，从而保持传感器的良好的响应性。

公开(公告)号：US06478941B2

公开(公告)日：2002-11-12

申请号：US09922716

申请日：2001-08-07

申请人： Gang E ,  Kiyomi Kobayashi ,  Yasumichi Hotta ,  Namitsugu Fujii

发明人： Gang E ,  Kiyomi Kobayashi ,  Yasumichi Hotta ,  Namitsugu Fujii

IPC分类号： G01N27409

CPC分类号： G01N27/4075 ,  C23C18/08 ,  C23C18/14 ,  C23C18/165

摘要： A gas sensing element has a solid electrolytic body, a reference gas side electrode provided on a surface of the solid electrolytic body so as to be exposed to a reference gas, and a measured gas side electrode provided on another surface of the solid electrolytic body so as to be exposed to a measured gas. A crystal face strength ratio of the measured gas side electrode according to X-ray diffraction is 0.7≦{I(200)/I(111)} or 0.6≦{I(220)/I(111)}.