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Limited current type oxygen sensor

A limiting current type, oxygen sensor technology, applied in instruments, scientific instruments, material analysis through electromagnetic means, etc., can solve problems such as limiting the working temperature of oxygen sensors, and achieve the goal of avoiding microstructure and performance changes and excellent long-term stability Effect

Inactive Publication Date: 2013-02-27
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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Problems solved by technology

However, the materials of the electrolyte layer and the dense diffusion barrier layer of this limiting current oxygen sensor are all zirconia-based materials or ceria-based materials. As mentioned above, this material has a higher oxygen ion conductivity only at higher temperatures. , which limits the operating temperature of oxygen sensors made of

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and the following specific embodiments. It should be understood that the following embodiments and / or accompanying drawings are only used to illustrate the present invention rather than limit the present invention.

[0017] The present invention proposes the use of medium temperature solid oxygen ion conductor material——La 1-x Sr x Ga 1-y Mg y o 3-δ (0.1≤x≤0.2, 0.1≤y≤0.2, 0.1≤δ≤0.2) make a dense diffusion barrier limiting current oxygen sensor. The material of the solid electrolyte layer and the dense diffusion barrier layer of this sensor are both La 1-x Sr x Ga 1-y Mg y o 3-δ , good matching and easy to make. A negative electrode layer can be arranged on the dense diffusion barrier layer, a positive electrode layer can be arranged under the solid electrolyte layer, and an equipotential electrode layer can be arranged between the dense diffusion barrier layer an...

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Abstract

The invention relates to a limited current type oxygen sensor which comprises an electrolyte layer and a compact diffusion barrier layer. The electrolyte layer and the compact diffusion barrier layer are both made of La1-xSrxGal-yMgyO3-delta, wherein 0.1<=x<=0.2, 0.1<=y<=0.2, and 0.1<=delta<=0.2. The sensor has good long-term stability.

Description

technical field [0001] The invention relates to a limiting current type oxygen sensor, in particular to a limiting current type oxygen sensor made of medium temperature solid oxygen ion conductor material. Background technique [0002] The measurement and control of oxygen concentration plays an important role in various industrial fields, especially in the fields of automobile, metallurgy and food. Usually, the oxygen sensor is used to measure the oxygen concentration in the environment, which is divided into two types according to the principle: concentration potential type and limiting current type. Among them, the limiting current oxygen sensor has been widely used because of its high precision, short response time, and no need for reference gas. The current oxygen sensor basically uses yttrium stabilized zirconia solid electrolyte (YSZ) material as the sensitive material, but this material has a high oxygen ion conductivity only when the temperature is greater than 800...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/409
Inventor 简家文王绍荣陈康
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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