Gas sensor element and gas sensor
A technology for gas sensors and components, which is applied in the fields of instruments, scientific instruments, electrochemical variables of materials, etc., can solve the problems of improving the responsiveness of gas sensors, and achieve the effect of improving the responsiveness.
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Embodiment approach 1
[0033] Regarding the gas sensor element and the gas sensor of Embodiment 1, using Figure 1 to Figure 7 Be explained. Such as image 3 As illustrated, the gas sensor element 10 of the present embodiment has the solid electrolyte body 20 having oxygen ion conductivity, the first electrode film 31 provided on one side of the solid electrolyte body 20 , and the other surface of the solid electrolyte body 20 . The second electrode film 32. At least one of the first electrode film 31 and the second electrode film 32 includes noble metal particles 33 , oxygen ion conductive solid electrolyte particles 34 , and pores 35 , and the capacitance in the electrode film is 80 μF or less. Additionally, if figure 1 , figure 2 As illustrated, the gas sensor 1 of the present embodiment includes the gas sensor element 10 of the present embodiment. Hereinafter, it will be described in detail.
[0034] Such as figure 1 and figure 2 As shown, the gas sensor 1 is an exhaust system sensor t...
Embodiment approach 2
[0051] The gas sensor element and the gas sensor according to Embodiment 2 will be described. In addition, among the symbols used in the second and subsequent embodiments, the same symbols as those used in the previous embodiment indicate the same components as those in the previous embodiment, unless otherwise indicated.
[0052] In the gas sensor element 10 of the present embodiment, at least one electrode film of the first electrode film 31 and the second electrode film 32 is set such that the value of Lre / Le in the cross section of the electrode film along the film thickness direction is It is not less than 0.50 and not more than 1.25. Wherein, Lre is the total length of the two-phase interface 36 between the noble metal particles 33 and the solid electrolyte particles 34 per section of the electrode film. In addition, Le is the total circumference of the solid electrolyte particles 34 per section of the electrode film.
[0053] According to this configuration, it is eas...
experiment example 1
[0062] A plurality of gas sensors having gas sensor elements having different electrostatic capacitances in the electrode film were prepared, and the offset responsiveness when the oxygen concentration in the measurement gas was measured by each gas sensor was obtained. In addition, in this experimental example, the primary particle diameter of the Pt particles used for forming the electrode film was 0.6 μm, and the primary particle diameter of the solid electrolyte particles used as the raw material was in the range of 0.2 μm to 0.6 μm. The above-mentioned primary particle size is the particle size (diameter) d50 (hereinafter omitted) when the volume-based cumulative frequency distribution measured by the laser diffraction / scattering method shows 50%.
[0063] Figure 8 The relationship between the capacitance (μF) in the electrode film and the offset response (-) is shown in . In addition, the imbalance responsiveness is determined by the difference between the amplitude X ...
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Abstract
Description
Claims
Application Information
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