摘要:
A gas sensor has a sensor element inserted in a cylindrical housing. A measured gas cover, provided at a distal end side of the housing, forms a measured gas environment at a distal end side of the sensor element. An atmospheric air cover, provided at a proximal end side of the housing, forms an atmospheric air environment at a proximal end side of the sensor element. A clearance between an inside surface of the housing and an outside surface of the sensor element is gastightly sealed with a sealing member including a plurality of powder filler layers to separate or isolate the measured gas environment from the atmospheric air environment.
摘要:
A gas sensor has a sensor element inserted in a cylindrical housing. A measured gas cover, provided at a distal end side of the housing, forms a measured gas environment at a distal end side of the sensor element. An atmospheric air cover, provided at a proximal end side of the housing, forms an atmospheric air environment at a proximal end side of the sensor element. A clearance between an inside surface of the housing and an outside surface of the sensor element is gastightly sealed with a sealing member including a plurality of powder filler layers to separate or isolate the measured gas environment from the atmospheric air environment.
摘要:
A powder filler is stuffed in a filler space defined between a housing and a gas sensing element so as to airtightly seal a clearance between the housing and the gas sensing element. The powder filler contains grains whose diameter is in a range from 80 μm to 5,000 μm when measured before being stuffed into the filler space. A weight percentage of the grains having the diameter of 80 μm to 5,000 μm is equal to or larger than 80% with respect to an overall weight of the powder filler.
摘要:
An improved structure of a gas sensor is provided which is designed to establish a desired degree of gas/liquid tight sealing between a sensor element and a housing. The gas sensor includes a powder seal fitted in a chamber defined between the sensor element and the housing. The dimensions of the powder seal and the chamber are selected to enhance gas/liquid tight properties of the powder seal.
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
摘要:
The present invention provides, as one aspect, a gas sensor element including a solid electrolytic substance having a bottomed cylindrical shape and oxygen ion conductivity, a reference electrode arranged on an inner side surface of the solid electrolytic substance, a measuring electrode arranged on an outer side surface of the solid electrolytic substance, and a protective layer which covers the outer side surface of the solid electrolytic substance together with the measuring electrode and which allows gas to be measured to pass through the protective layer, wherein an end side of the gas sensor element is formed of a leg portion whose profile line is straight on an axial cross section and a bottom portion whose profile line is curved, and the film thickness of the protective layer of the bottom portion is larger than the film thickness of the protective layer of the leg portion.
摘要:
An active liquid applicator is provided which is designed to coat a surface of an electronic parts such as an oxygen sensor with an active liquid for forming an electrode. The liquid applicator includes a nozzle head and a nozzle tube. The nozzle tube has disposed therein a pearmable member which produces capillary attraction of an active liquid thereinto and feed it to the nozzle head, thereby enabling formation of a thin active film on the electronic part which has the thickness controllable with high accuracy.
摘要:
An oxygen sensor element 1 includes: a cup-shaped solid electrolyte body 10, inside of which a reference gas chamber 13 is provided; a measuring electrode 11 that comes into contact with measured gas; and a reference electrode 12. A heater 2 is disposed inside the reference gas chamber 13. The measuring electrode 11 is formed surrounding the outer surface 101 in a tip end section 100 of the solid electrolyte body 10. The reference electrode 12 is formed in a measuring-electrode-opposing-region 102a that is a region on the inner surface 102 of the solid electrolyte body 10 opposing the measuring electrode 11 with the solid electrolyte body 10 therebetween. The area S1 of the measuring electrode 11 and the area S2 of the reference electrode 12 satisfy a relationship 0.010≦S2/S1
摘要:
A semiconductor module is formed by alternately stacking resin boards 3 on which semiconductor chips 2 are mounted and sheet members having openings larger than the semiconductor chips 2 and bonded to the resin boards 3. The resin board 4 located at the bottom out of the resin boards 3 is thicker than the other resin boards 3.
摘要:
An imaging module is formed by stacking: a first resin board; a second resin board having a first opening; a first electrically-conductive member electrically connecting the first resin board and the second resin board to each other; a printed circuit board having a second opening; a second electrically-conductive member electrically connecting the second resin board and the printed circuit board to each other; an imaging semiconductor chip mounted on the lower surface of the second resin board to cover the first opening and provided with an imaging sensor, an optical member placed on the upper surface of the second resin board to cover the first opening; a first semiconductor control chip provided with a control device for controlling operation of the imaging sensor and mounted on the lower surface of the first resin board.