Nitrogen-oxygen sensor

A nitrogen and oxygen sensor, a sensitive technology, applied in the field of sensors, can solve the problems of limited application range, easy failure, poor selectivity, etc., and achieve the effect of simple manufacturing process, wide measurement range and fast response speed
CN102608183AInactive Publication Date: 2012-07-25HUAZHONG UNIV OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2012-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a nitrogen-oxygen sensor, which comprises a zirconium oxide substrate, two sensitive electrodes and a reference electrode, wherein the zirconium oxide substrate is made of yttrium-oxide-stabilized zirconium oxide, both the two sensitive electrodes are positioned on the zirconium oxide substrate and used for contacting with detected gas, one sensitive electrode is sensitive to NO (nitrogen monoxide) gas, the other sensitive electrode is sensitive to NO2 (nitrogen dioxide) gas, the reference electrode is positioned on the other side of the zirconium oxide substrate and used for contacting with air, and the two sensitive electrodes are respectively electrically connected with the reference electrode. The operating range of the nitrogen-oxygen sensor ranges from 350 DEG C to 800 DEG C, the concentration range of detected nitrogen oxides ranges from 5ppm to 3000ppm, and the response time can reach 1.2 seconds. The nitrogen-oxygen sensor is simple in structure and high in response speed and has the advantages of stable performance, simple manufacture process and wide measurement range.
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Description

Technical field

[0001] The invention belongs to sensor technology, in particular to a measuring sensor for nitrogen oxide gas, which is suitable for the measurement of automobile exhaust gas and nitrogen oxide gas in the metallurgical industry. Background technique

[0002] Nitrogen oxide (NOx) refers to NO and NO 2 The mixed gas is one of the main harmful gases that produce acid rain and other acid deposits, which damage human health and the environment. With the continuous increase of automobiles, the emission of their exhaust gas increases the NOx gas content in the atmosphere. To control the nitrogen oxide content in the atmosphere, it is necessary to detect the nitrogen oxide content and monitor the nitrogen oxide emitted by automobiles.

[0003] Nitrogen and oxygen sensors currently mainly include: semiconductor type, concentration potential type and composite potential type. The semiconductor sensor has relatively poor gas selectivity and stability; the concentration potent...

Claims

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