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Oxygen sensor comprising toothed plate transition layer and preparation technology thereof

An oxygen sensor and transition layer technology, applied in the field of oxygen sensors, can solve the problems of low product yield, long manufacturing process, cracking of the oxygen sensor, etc., and achieve the improvement of product yield and yield, the reduction of process production difficulty, and the reduction of cracking. effect of chance

Inactive Publication Date: 2017-09-29
SHENZHEN PULYSTON SENSOR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This method has the following problems: during the sintering process of the laminated green body, the shrinkage coefficients between the materials of each layer are inconsistent, which leads to the easy cracking of the oxygen sensor chip and the failure of the product. At the same time, if the oxygen sensor encounters In the case of drastic temperature changes, the expansion ratio of each layer in the oxygen sensor does not match, resulting in cracking of the oxygen sensor and reducing the service life of the sensor
[0005] In order to solve the above technical problems, Chinese patent 201410324058.1 discloses a chip sensor and its preparation method, which includes a stacked signal layer, an air channel support layer and a heating layer, and the heating layer includes a stacked first transition layer, a first insulating Layer, heating electrode, second insulating layer, second transition layer, heating substrate, the first transition layer and the fifth transition layer are arranged symmetrically, and the materials of the first transition layer and the second transition layer are consistent with the properties of other layers. The matching problem of each layer is solved, but the first transition layer and the second transition layer are composed of 5 layers of gradient film, the structure is complex, the production process is long and difficult, and the product yield is low

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  • Oxygen sensor comprising toothed plate transition layer and preparation technology thereof
  • Oxygen sensor comprising toothed plate transition layer and preparation technology thereof
  • Oxygen sensor comprising toothed plate transition layer and preparation technology thereof

Examples

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Embodiment 1

[0032] This embodiment provides an oxygen sensor including a tooth plate transition layer, such as Figure 1-2 As shown, the oxygen sensor includes a signal layer, an intermediate layer, a transition layer and a heating layer stacked in sequence from top to bottom for detecting and transmitting voltage signals, wherein the transition layer includes sequentially from top to bottom The first zirconia green sheet 1, the first tooth plate layer 2, the insulating sheet 3, the second tooth plate layer 4 and the second zirconia green sheet 5 are stacked, the first zirconia green sheet 1 and the intermediate layer Adjacent setting. Specifically, the first tooth plate layer 2 and the second tooth plate layer 4 are composed of first and second convex lines arranged in parallel and alternately along the length direction of the tooth plate layer, and the material of the first convex line It is alumina, the material of the second convex line is 5% yttrium stabilized zirconia (5YSZ), the d...

Embodiment 2

[0045] This embodiment provides an oxygen sensor including a tooth plate transition layer, its structure is basically the same as that of Embodiment 1, the difference is that the material of the second convex line is alumina, and the thickness of the signal substrate 6 and the heating substrate 14 is 0.4mm .

[0046] This embodiment also provides a process for preparing an oxygen sensor including a tooth plate transition layer, which includes the following steps:

[0047] a. To make the heating layer, first prepare the heating substrate 14, take 100g of 5YSZ powder, put it in a ball mill jar, add 40g of alcohol, 40g of toluene and 3g of fish oil, disperse it by ball milling for 13h, then add 15g of polyvinyl butyral (PVB), 9g of Butyl benzyl phthalate (BBP) and 8g polyethylene glycol-400, ball milled for 11h, to obtain a casting slurry with a solid content of 51.5%, cast the slurry on a casting machine, and obtain the casting slurry after drying Blank, cut the blank into a th...

Embodiment 3

[0054] This embodiment provides an oxygen sensor comprising a tooth plate transition layer, the structure of which is basically the same as that of Embodiment 1, except that the material of the second convex line is a mixture of 5YSZ and alumina, wherein the mass percentage of 5YSZ is 80% %, the thickness of the signal substrate 6 and the heating substrate 14 is 0.4mm.

[0055] This embodiment also provides a process for preparing an oxygen sensor including a tooth plate transition layer, which includes the following steps:

[0056] a. To make the heating layer, first prepare the heating substrate 14, take 100g of 5YSZ powder, place it in a ball mill jar, add 35g of alcohol, 36g of toluene and 2g of fish oil, disperse it by ball milling for 12h, then add 14g of polyvinyl butyral (PVB), 8g of Butyl benzyl phthalate (BBP) and 6g polyethylene glycol-400, ball milled for 10h, obtained a casting slurry with a solid content of 46.7%, cast the slurry on a casting machine, and obtaine...

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Abstract

The invention discloses an oxygen sensor comprising a toothed plate transition layer. The oxygen sensor comprises a signal layer, a middle layer, a transition layer and a heating layer which are sequentially overlapped, wherein the transition layer comprises a first zirconium oxide blank sheet, a first toothed plate layer, an insulation sheet, a second toothed plate layer and a second zirconium oxide blank sheet which are sequentially overlapped, and the first zirconium oxide blank sheet is adjacent to the signal layer. The oxygen sensor has the advantages that by arranging the transition layer between the middle layer and the heating layer, the shrinkage and expansion coefficients of each layer are utilized, the cracking probability of the semi-finished product of the oxygen sensor after overlapping of the layers in the firing process or the product in the use process is reduced, and the service life of the sensor is prolonged; the transition layer can realize the insulation function, the structure of the transition layer is simple, the production and manufacturing are easy, and the oxygen sensor is suitable for industrial batched production. The invention also discloses a preparation technology of the oxygen sensor. Compared with the existing gradient overlapping transition layer technology, the preparation technology has the advantages that the preparation technology is greatly simplified, the difficulty in technology production is obviously decreased, and the qualified rate of the product is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of oxygen sensors, and relates to an oxygen sensor including a transition layer and a preparation process thereof, in particular to an oxygen sensor including a tooth plate transition layer and a preparation process thereof. Background technique [0002] Automobile oxygen sensor is a key device to accurately control the air-fuel ratio of the engine by detecting the oxygen content in the exhaust gas and converting it into an electrical signal and feeding it back to the engine control unit, so that the engine can achieve closed-loop control with the goal of excess air factor, Ensure that the three-way catalytic converter has the maximum conversion efficiency for the three pollutants of hydrocarbons, carbon monoxide and nitrogen oxides in the exhaust. [0003] Oxygen sensors are usually heating sensors. According to their structure, they can be divided into heating tube oxygen sensors and heating chip oxygen se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30C09D1/00
CPCG01N27/307C09D1/00
Inventor 江澍石亮张舟
Owner SHENZHEN PULYSTON SENSOR TECH CO LTD