Method for preparing mixed conductor dense diffusion barrier-type oxygen sensor

A hybrid conductor, oxygen sensor technology, applied in the direction of material electrochemical variables, etc., can solve the problems of reducing the oxygen concentration measurement range of the oxygen sensor, reducing the tightness of the dense diffusion barrier layer, and inconsistent thermal shrinkage rate, etc. The effect of fine particle size and short sintering cycle

Inactive Publication Date: 2010-06-02
NINGBO UNIV
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Problems solved by technology

However, if the traditional sintering method is used, the prepared zirconia electrolyte ceramics have problems such as poor density and long sintering cycle. However, when the traditional co-firing method is used to prepare the composite ceramics, due to the inconsistency of the thermal sh

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  • Method for preparing mixed conductor dense diffusion barrier-type oxygen sensor
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[0029] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0030] Such as Figure 1 to Figure 7 As shown in the figure, positive collector 1; positive lead 2; electrolyte layer 3; dense diffusion barrier layer 4; negative collector 5; negative lead 6; encapsulation layer 7.

[0031] Such as Figure 1 to Figure 4 As shown, what the technology of the present invention prepares is a kind of limiting current type oxygen sensor, is made up of electrolyte layer 3, dense diffusion barrier layer 4, encapsulation layer 7, and positive collector 1, negative collector 5, is connected on positive collector 1 There is a positive lead 2 and a negative lead 6 is connected to the negative collector 5 . Among them, the electrolyte layer 3 and the dense diffusion barrier layer 4 are sintered toge...

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Abstract

The invention provides a method for preparing a mixed conductor dense diffusion barrier-type oxygen sensor. The prepared oxygen sensor comprises an electrolyte layer, a dense diffusion barrier layer, an encapsulation layer, porous positive and negative collectors and the like. The electrolyte layer is made of a zirconia material; the dense diffusion barrier layer is made of a mixed conductor material consisting of zirconia and La1-xSrxMnO3; the encapsulation layer is made of glass glaze; the electrolyte layer and the dense diffusion barrier layer are formed by direct sintering through spark plasma sintering technology; porous positive and negative collector layers are formed by directly printing the positive and negative collectors on upper and lower surfaces of a composite material through screen printing and sintering the printed positive and negative collectors; and the encapsulation layer is coated at the edge of composite multi-layer ceramic. Due to the adoption of the spark plasma sintering technology, the prepared sensor solves the problems of turn-up, cracking and the like, has the characteristics of good repeatability, stable performance, simple preparation process, shortpreparation period, small volume, quick response and the like, and is suitable for the detection of wide oxygen concentration.

Description

technical field [0001] The invention relates to a preparation method of a mixed conductor dense diffusion barrier oxygen sensor, which is suitable for detecting ZrO2 in a wide range of oxygen concentration 2 Preparation of the base-limiting current oxygen sensor. Background technique [0002] The measurement and control of oxygen concentration plays an important role in various industrial fields, especially in the automobile, metallurgy, and oxygen production industries. The sensors currently in use are divided into two types according to their principles: concentration potential type and limiting current type, and the limiting current type Oxygen sensors are being widely used for their advantages of high precision, fast response, long service life and no need for reference gas during use; limiting current oxygen sensors can be divided into pore diffusion barrier types (including small pore diffusion barrier type, porous Diffusion barrier type) and mixed conductor dense dif...

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Application Information

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IPC IPC(8): G01N27/41
Inventor 邹杰简家文汪益王金霞
Owner NINGBO UNIV
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