Sheet-type structure oxygen sensor and manufacturing method thereof

The technology of an oxygen sensor and its manufacturing method, which is applied in the field of oxygen sensors, can solve problems such as product appearance bending and product structure asymmetry, and achieve the effects of beautiful appearance, reduced macro cracks, and reasonable structural design

Inactive Publication Date: 2014-11-12
XIAMEN HONGFA ELECTRIC POWER CONTROLS
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Problems solved by technology

There is also a composite structure of alumina and zirconia, but only the electrolyte layer is made o

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  • Sheet-type structure oxygen sensor and manufacturing method thereof

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[0032] Example

[0033] See figure 1 As shown, a chip structure oxygen sensor of the present invention includes a heating body 1, a zirconia solid electrolyte 2, and a supporting structure 3 with insulating characteristics between the heating body 1 and the zirconia solid electrolyte 2; The zirconium solid electrolyte 2, the supporting structure 3, and the heating body 1 are arranged in sequence from top to bottom. A zirconia symmetric layer 4 is also provided between the supporting structure 3 and the heating body 1. The zirconia solid electrolyte 2 is symmetrically distributed relative to the support structure 3; during the sintering process, the sintering stress of the symmetrical zirconia layer 4 and the sintering stress of the zirconia solid electrolyte 2 offsets each other, which can reduce the sintering stress.

[0034] The heating body 1 includes an alumina carrier 11 and a platinum electrode heating circuit 12 arranged on the upper surface of the alumina carrier; the pres...

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Abstract

The invention discloses a sheet-type structure oxygen sensor and a manufacturing method of the sheet-type structure oxygen sensor. The sheet-type structure oxygen sensor comprises a heating body, zirconia solid electrolyte, and a supporting structure body which is arranged between the heating body and the zirconia solid electrolyte and has an insulating feature, wherein the zirconia solid electrolyte, the supporting structure body and the heating body are sequentially arranged from top to bottom, a zirconia symmetrical layer is further arranged between the supporting structure body and the heating body, and the zirconia symmetrical layer and the zirconia solid electrolyte are symmetrically distributed relative to the supporting structure body. According to the sheet-type structure oxygen sensor and the manufacturing method of the sheet-type structure oxygen sensor, the zirconia layer and the electrolyte layer are added to form a symmetrical structure, and the sheet-type structure oxygen sensor has the advantages of being stable in structure, easy to prepare and capable of obviously improving the sintering qualification rate of products and prolonging the service life.

Description

technical field [0001] The invention relates to the technical field of oxygen sensors, in particular to an oxygen sensor with a composite structure of zirconia and alumina for gasoline vehicles and a manufacturing method thereof. Background technique [0002] With the rapid development of the automobile industry, automobile exhaust pollution has gradually become one of the main pollution sources in Chinese cities, and the emission standards for automobile exhaust have gradually become stricter. In July 2013, China has strictly implemented the fourth phase of emission standards. At present, the tube-type vehicle oxygen sensor is gradually replaced by a chip-type switch-type oxygen sensor with faster response speed, higher integration and lower cost. [0003] The existing oxygen sensor with a chip structure uses a full zirconia structure, and a thin layer of aluminum oxide is added on the upper and lower surfaces of the heater circuit to achieve the effect of insulation. This ...

Claims

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Application Information

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IPC IPC(8): G01N27/409
Inventor 王齐军尹镭钟叔明聂志辉
Owner XIAMEN HONGFA ELECTRIC POWER CONTROLS
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