Manufacturing method of double-layer structure of electrolyte layer and compact diffusion layer for oxygen sensor

A technology of electrolyte layer and double-layer structure, which is applied in the direction of instruments, scientific instruments, and material analysis through electromagnetic means. It can solve the problems of dense diffusion layer with many pores, cracks in sintered body, and unfavorable mass production, etc., and achieve 3D printing. The effect of saving speed, reducing pores, and shortening the production cycle

Active Publication Date: 2017-11-24
NORTHEASTERN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, using spark plasma sintering (SPS) technology, it is easy to cause the sintered body to crack due to the mismatch between the material of the dense diffusion layer and the material of the electrolyte layer during the sintering process, thus affecting the oxygen measurement performance
Using the co-pressing co-sintering method, because the thermal expansion coefficient and sintering shrinkage of the material of the dense diffusion layer and the material o

Method used

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  • Manufacturing method of double-layer structure of electrolyte layer and compact diffusion layer for oxygen sensor
  • Manufacturing method of double-layer structure of electrolyte layer and compact diffusion layer for oxygen sensor
  • Manufacturing method of double-layer structure of electrolyte layer and compact diffusion layer for oxygen sensor

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Embodiment 1

[0032] refer to figure 2 , this embodiment provides a method for manufacturing a double-layer structure of an electrolyte layer and a dense diffusion layer for an oxygen sensor, which specifically includes the following steps:

[0033] S11. Prepare the electrolyte layer green body. The electrolyte layer green body is a non-compact layered object, which has not become a dense body, and requires sintering and cooling after sintering to form the electrolyte layer. The main component in the electrolyte layer body that forms the corresponding electrochemical properties is YSZ (Y 2 o 3 -stabilized-ZrO 2 ), wherein the electrolyte layer green body is a cylinder.

[0034] S12. Use 3D printing technology to form a dense diffusion layer green body on the electrolyte layer green body. The dense diffusion layer green body is a layered object that is not tightly connected and has not become a dense body. It also needs sintering and cooling after sintering. A dense diffuse layer is for...

Embodiment 2

[0067] The difference between the manufacturing method of the double-layer structure of the electrolyte layer and the dense diffusion layer provided in this embodiment and the embodiment 1 is that:

[0068] In step S15, the thickness of the electrolyte layer 3 is 2.5 mm, and the thickness of the dense diffusion layer 2 is 1.8 mm.

[0069] The double-layer structure formed in this embodiment was made into an oxygen sensor. After testing, the range of oxygen measurement was 0-29.7vol%.

Embodiment 3

[0071] The difference between the manufacturing method of the double-layer structure of the electrolyte layer and the dense diffusion layer provided in this embodiment and the embodiment 1 is that:

[0072] In step S15, the thickness of the electrolyte layer 3 is 2 mm, and the thickness of the dense diffusion layer 2 is 1.6 mm.

[0073] The double-layer structure formed in this embodiment was made into an oxygen sensor. After testing, the range of oxygen measurement was 0-30vol%.

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Abstract

The invention relates to the technical field of an electrochemical oxygen sensor, in particular to a manufacturing method of a double-layer structure of an electrolyte layer and a compact diffusion layer for an oxygen sensor. A 3D printing technology is used for forming a compact diffusion layer blank on an electrolyte layer blank body/electrolyte layer; or the 3D printing technology is used for forming the compact diffusion layer on the electrolyte layer. Through the application of the 3D printing technology, the tissues of the finally formed compact diffusion layer is compact and uniform; the air pores are obviously reduced; the bonding intensity with the electrolyte layer is high; the heat influence region range and the deformation of the electrolyte layer can be reduced to the minimum degree; cracks cannot easily occur; the performance of the oxygen sensor with the double-layer structure and performance stability are improved. In addition, the width and the thickness of the compact diffusion layer can be precisely controlled; the 3D printing speed is high; the preparation period is short; the method is applicable to large-scale production.

Description

technical field [0001] The invention relates to the technical field of electrochemical oxygen sensors, in particular to a method for manufacturing a double-layer structure of an electrolyte layer and a dense diffusion layer for an oxygen sensor. Background technique [0002] The application of electrochemical oxygen sensors in the detection of oxygen content has attracted more and more attention. Electrochemical oxygen sensors mainly include concentration potential type oxygen sensors and limiting current type oxygen sensors. Among them, the concentration potential type oxygen sensor has disadvantages such as insensitivity to lean-burn zone control. Therefore, the limiting current type oxygen sensor with wider application, more sensitive response, and longer life has attracted much attention. [0003] Limiting current oxygen sensors are divided into small hole type, porous type and dense diffusion barrier layer type. Among them, the small hole type and porous type have defec...

Claims

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Application Information

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IPC IPC(8): G01N27/407G01N27/409C04B35/50C04B35/622
CPCC04B35/48C04B35/50C04B35/622C04B2235/3213C04B2235/3225C04B2235/3262C04B2235/3418G01N27/4072G01N27/409
Inventor 刘涛王相南于景坤
Owner NORTHEASTERN UNIV
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