Nitrogen oxygen sensor ceramic chip

Abstract

The invention discloses a nitrogen oxide sensor ceramic chip. The nitrogen oxide sensor ceramic chip comprises a six-layer substrate laminated from top to bottom. The NOX catalytic decomposition witha nitrogen oxygen sensor and measurement regions are designed as a three-dimensional porous structure, which greatly increases the contact area between the gas and the electrode. The close combinationof the interface of each functional layer material solves the problem of heat uniformity and stability of the test area, and the measurement of the concentration of NOX gas is more accurate. The structure of the nitrogen oxide sensor ceramic chip improves the heat uniformity and stability of the test area of the chip, and also improves the structural strength of the chip to a certain extent. Moreover, the contamination of the test electrode by the volatilization of the catalytically inactive metal Au during high-temperature sintering can be effectively prevented. The measurement accuracy is higher. The production process is simple. The production is easy. The service life is long.

Description

technical field [0001] The invention belongs to the technical field of nitrogen and oxygen sensors, in particular to a ceramic chip for nitrogen and oxygen sensors. Background technique [0002] With the rapid development of the economy, automobiles have become an indispensable means of modern transportation for human beings, but automobile exhaust has become NO in the atmosphere. X Major source of gaseous pollutants. In order to protect the environment, the automobile exhaust emission standards formulated by countries around the world are becoming more and more stringent, which requires the analysis of NO in automobile exhaust emissions. X The gas is monitored and processed in real time, and the nitrogen and oxygen sensor is one of the core components in the monitoring system. [0003] The nitrogen and oxygen sensor ceramic chips reported so far are all formed by laminating and sintering multilayer zirconia ceramic substrates. Under the condition that the heating electro...

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Problems solved by technology

[0006] Due to the design of multiple gas cavity structures in the prior art, the nitrogen and oxygen sensor measurement area is heated unevenly and unstable, resulting in the nitrogen and oxygen sensor being sensitive to NO X Gas concentration measurement accuracy is not high, the invention provides a simple manufacturing process, easy to produce, NO X A more accurate nitrogen and oxygen sensor for concentration measurement can improve the structural strength of the nitrogen and oxygen sensor chip, and can effectively avoid the pollution of the active electrode due to the volatilization of Au during the high temperature sintering process

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