Abstract
The dependency between the electrical conductivity and the temperature of the tin dioxide layer at the constant concentration of the detected gas is derived here. The derived equation is modified as a function of two variables describing the dependence of the electrical conductivity of the sensor on both the temperature and the concentration. The derived formulas were verified by approximation of the measured data. These formulas can be useful in practical applications.
Highlights
The tin dioxide sensors for the gas detection in air have been used for years
The detection process is based on the changes of the electrical conductivity of a tin dioxide layer heated to a sufficiently high temperature
Sensor response - it is a term used here to refer to the electrical conductance of the tin dioxide layer
Summary
The tin dioxide sensors for the gas detection in air have been used for years. The detection process is based on the changes of the electrical conductivity of a tin dioxide layer heated to a sufficiently high temperature. It is shown for example in [4], [5], [6] The advantage of this approach is that it is not necessary to deal with the complex physical-chemical phenomena or the band theory. The examples of such an approach can be found in [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17] The advantages of this description are the objectivity and the relation to the physical-chemical phenomena. This model extends the results described in [18]
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