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Diaphragm of ceramic chip for nitrogen and oxygen sensor

A technology of nitrogen and oxygen sensors and diaphragms, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of electric leakage, poor insulation performance of heaters, etc., improve the insulation effect, reduce the rate of defective products and printing costs, high The effect of sintering compatibility

Active Publication Date: 2022-03-04
西安创联电气科技(集团)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional preparation process, YSZ (8%mol Y 2 o 3 Stable ZrO 2 ) The diaphragm is used as the ceramic base material of the heater layer, and the nitrogen and oxygen sensor ceramic chip has poor heater insulation performance and leakage problems

Method used

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  • Diaphragm of ceramic chip for nitrogen and oxygen sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the diaphragm of the nitrogen and oxygen sensor ceramic chip in this embodiment includes a first layer of diaphragm 1, a second layer of diaphragm 2, a third layer of diaphragm 3, and a fourth layer of diaphragm that are laminated sequentially from top to bottom. 5 and the fifth layer of diaphragm 6. The fifth layer of diaphragm 6 is printed with heating electrodes 7 by screen printing technology. The first layer of diaphragm 1 is formed by laminating three layers of YSZ diaphragms with a thickness of 120 μm. Both the second layer of diaphragm 2 and the third layer of diaphragm 3 are laminated by two layers of YSZ diaphragms with a thickness of 120 μm, and the fourth layer of diaphragm 5 is Al with a thickness of 120 μm. 2 o 3 Diaphragm, the fifth layer of diaphragm 6 consists of three layers of Al with a thickness of 120 μm 2 o 3 The diaphragm is laminated. Between the third layer of diaphragm 3 and the fourth layer of diaphragm 5, a tran...

Embodiment 2

[0027] The structure of the diaphragm of the nitrogen and oxygen sensor ceramic chip of this embodiment is the same as that of Embodiment 1, the thickness of the upper transition layer 4-1, the middle transition layer 4-2, and the lower transition layer 4-3 are all 100 μm, doped with Al 2 o 3 The YSZ diaphragm is cut after drying the film tape formed by the tape casting slurry with the following mass percentages:

[0028] Main material 60%, polyvinyl alcohol 3%, polyethylene glycol 6%, castor oil 1%, ethanol 29%, n-butanol 0.05%, ethylene glycol 0.05%, cyclohexanone 0.9%, of which the upper transition layer 4 The mass percentage composition of the main material in -1 is: YSZ80%, Al 2 o 3 20%, the mass percentage composition of the main material in the intermediate transition layer 4-2 is: YSZ 55%, Al 2 o 3 45%, the mass percentage composition of the main material in the lower transition layer 4-3 is: YSZ 20%, Al 2 o 3 80%.

Embodiment 3

[0030] The structure of the diaphragm of the nitrogen and oxygen sensor ceramic chip of this embodiment is the same as that of Embodiment 1, the thickness of the upper transition layer 4-1, the middle transition layer 4-2, and the lower transition layer 4-3 are all 130 μm, doped with Al 2 o 3 The YSZ diaphragm is cut after drying the film tape formed by the tape casting slurry with the following mass percentages:

[0031] Main material 60%, vinyl butyral 7%, polyethylene glycol 3%, fish oil 10%, ethanol 10%, toluene 9%, n-butanol 0.25%, ethylene glycol 0.25%, cyclohexanone 0.5%, Wherein the mass percentage composition of the host material in the upper transition layer 4-1 is: YSZ 75%, Al 2 o 3 25%, the mass percentage composition of the main material in the intermediate transition layer 4-2 is: YSZ 45%, Al 2 o 3 55%, the mass percentage of the main material in the lower transition layer 4-3 consists of: YSZ 25%, Al 2 o 3 75%.

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Abstract

The invention discloses a diaphragm of a nitrogen and oxygen sensor ceramic chip, which comprises first to fifth layers of diaphragms laminated sequentially from top to bottom, the first to third layers of diaphragms are all YSZ diaphragms, and the fourth layer The diaphragm and the fifth diaphragm are Al 2 o 3 Diaphragm, a transition layer is laminated between the third layer of diaphragm and the fourth layer of diaphragm. layer, intermediate transition layer, and lower transition layer are all Al-doped 2 o 3 The YSZ diaphragm, in which the host material of the upper transition layer is Al 2 o 3 The doping amount is 15% to 25%, and the main material of the intermediate transition layer is Al 2 o 3 The doping amount is 40% to 55%, and the main material of the lower transition layer is Al 2 o 3 The doping amount is 75% to 85%. The sintering matching between the membranes of the invention is good, the insulation performance of the heater layer is obviously improved, and there is no leakage phenomenon.

Description

technical field [0001] The invention belongs to the technical field of manufacturing gas-sensitive ceramics, and in particular relates to a diaphragm of a ceramic chip of a nitrogen-oxygen sensor, mainly ceramic matrix materials above and below an insulating layer of a heater of the ceramic chip of the nitrogen-oxygen sensor. Background technique [0002] With the improvement of people's living standards and the increase of car ownership, automobile exhaust emissions have become one of the main air pollution, especially in densely populated large and medium-sized cities in my country, the environmental pollution caused by automobile exhaust emissions is becoming more and more popular. people's attention. [0003] In recent years, with the continuous improvement of people's requirements for environmental quality, countries have successively raised the exhaust emission standards. In Europe, the exhaust emission standards have been raised from the initial country I to the countr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/0037
Inventor 韩领社李照皇晓辉殷春民孙卫龙
Owner 西安创联电气科技(集团)有限责任公司