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Plate type ceramic oxygen sensor

An oxygen sensor, a flat-plate technology, applied in the field of oxygen sensors, can solve problems such as warping, and achieve the effect of avoiding sintering shrinkage

Inactive Publication Date: 2017-12-29
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is worth noting that zirconia and alumina materials have great differences in sintering shrinkage and thermal expansion coefficient, and problems such as delamination, bending, and warping are prone to occur during the co-firing process, but there is no provide solutions to these problems

Method used

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  • Plate type ceramic oxygen sensor

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Embodiment Construction

[0037] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The same reference numerals are assigned to the same or corresponding components in the respective drawings.

[0038] figure 1 It is a schematic diagram showing the structure of a flat ceramic oxygen sensor according to an embodiment of the present invention. in the figure 1 In the illustrated embodiment, for the convenience of expression, the stacking direction is also referred to as the up-down direction.

[0039] Such as figure 1 As shown, the ceramic oxygen sensor S according to the present invention is electrode pin 1, alumina insulating layer 2, zirconia symmetrical layer 3, alumina substrate layer 4, heater 5, alumina substrate layer 6- 10. Reference gas channel 11, inner sensitive electrode 12, zirconia functional layer 13, outer sensitive electrode 14, aluminum oxide insulating layer 15, electrode pin 16 a...

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Abstract

The invention provides a plate type ceramic oxygen sensor which comprises electrode pins, a heater, a plurality of aluminum oxide substrate layers, a reference ratio air channel, an internal sensitive electrode, a zirconium oxide functional layer, an external sensitive electrode, a sensitive electrode protection layer as well as a zirconium oxide symmetric layer and aluminum oxide insulating layers, wherein the zirconium oxide symmetric layer is arranged in symmetry with the zirconium oxide functional layer in an overlapping direction; and the aluminum oxide insulating layers are respectively arranged on the upper side and the lower side in the overlapping direction. According to the plate type ceramic oxygen sensor, the problems that an aluminum oxide based oxygen sensor is bent and warped and the like, and power leakage can be caused by electrode pins on a zirconium oxide layer, are solved, and thus the plate type ceramic oxygen sensor which is high in flatness, simple in process and stable in property is provided.

Description

technical field [0001] The invention relates to the field of oxygen sensors, in particular to a flat ceramic oxygen sensor applied to automobiles. Background technique [0002] With the rapid development of the automobile industry, the problem of environmental pollution caused by automobile exhaust is becoming more and more serious. Therefore, effective control of automobile exhaust and reduction of its environmental pollution have become one of the important research topics today. On an engine that uses a three-way catalytic converter to reduce exhaust pollution, an oxygen sensor is an essential component, and it is one of the important components for a car to save fuel and reduce emissions. [0003] Once the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification ability of the three-way catalyst for carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) will drop sharply. Therefore, the oxygen sensor is installed in the exh...

Claims

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Application Information

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IPC IPC(8): G01N27/409G01N27/407
CPCG01N27/409G01N27/4072G01N27/4075
Inventor 孟燮占忠亮聂怀文吴昊
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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