Gas sensor element, gas sensor, and method of manufacturing gas sensor element
A gas sensor and component technology, applied in the field of gas sensor components, can solve problems such as disconnection and easy generation of cracks
Active Publication Date: 2016-04-06
NGK SPARK PLUG CO LTD
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- Description
- Claims
- Application Information
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Problems solved by technology
[0005] However, in the gas sensor element of this Patent Document 1, since a step-like height difference occurs at the boundary between the solid electrolyte body (electrolyte portion) and the insulating member (insulation portion), the electrode (conductor layer) formed across them ), cracks and broken lines are likely to occur on this boundary portion
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[0072] First, the gas sensor 1 including the gas sensor element 10 of the present embodiment will be described. figure 1 It is a vertical cross-sectional view of the gas sensor 1 of the embodiment cut along the axis AX. figure 2 It is a plan view of the gas sensor element 10 of the embodiment. image 3 It is an exploded perspective view of the gas sensor element 10 . Figure 4 yes figure 2 The B-B arrow cross section.
[0073] The gas sensor 1 is an oxygen sensor installed in an exhaust pipe (not shown) of an internal combustion engine (see figure 1 ). This gas sensor 1 includes a cylindrical metal shell 20 that holds the gas sensor element 10 inside itself, in addition to a gas sensor element 10 capable of detecting the oxygen concentration in an exhaust gas that is a gas to be measured. In addition, on the front end side of the metal fitting 20 ( figure 1 Middle and lower) are equipped with an external protector 31 and an internal protector 32, on the rear end side (...
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Abstract
Provided is a gas sensor element, gas sensor, and method of manufacturing gas sensor element. The gas sensor element is provided with a conductor layer formed by boundaries of an electrolyte portion and an insulation portion cross a composite cemaric layer. The gas sensor element includes a composite ceramic layer having an insulation portion and an electrolyte portion disposed within a through hole, and a first conductor layer extending in a continuous manner on a first insulation main surface of the insulation portion as well as on a first electrolyte main surface of the electrolyte portion. The electrolyte portion is thinner than the insulation portion, and the first electrolyte main surface is located on a thickness-direction inward side. The insulation portion has, on a first insulation main surface side, a protruding portion overlying the first electrolyte main surface. The thickness of the protruding portion reduces toward the inward side of the through hole. The first conductor layer extends in a continuous manner on a protrusion surface as well as on the first electrolyte main surface.
Description
technical field [0001] The present invention relates to a gas sensor element for detecting a gas to be measured, a gas sensor including such a gas sensor element, and a method for manufacturing the gas sensor element. Background technique [0002] Regarding the gas sensor element, for example, Patent Document 1 discloses a gas sensor element having a composite layer in which a solid electrolyte body (electrolyte part described later) and an insulating member (insulator part described later) are present in one layer. In this patent document 1, the dimensional difference between the thickness dimension of the solid electrolyte body and the thickness dimension of the insulating member is made to be equal to or less than the thickness dimension of the electrode (conductor layer). Thus, the portion of the electrode laminated on the solid electrolyte body and the portion laminated on the insulating member are at least partially in contact with each other, and it is possible to pre...
Claims
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IPC IPC(8): G01N27/30
CPCG01N27/4071G01N27/4073
Inventor 今野孝冈崎聪史中川将生繁田春彦
Owner NGK SPARK PLUG CO LTD