| 摘要 |
<p>The gas sensor carries at least one electrode composed essentially of a fine-particle ceramic material in order to form a support structure and of an electron-conducting fine-particle material. In order to increase the adherence of the cermet electrodes and to improve the stability of their activity, the fine-particle ceramic material is in a form which does not permit the occurrence of metastable modifications during electrode manufacture. Accordingly, the fine-particle ceramic material of these cermet electrodes consists of fully-stabilized zirconium dioxide. If the substrate in the form of ZrO2 solid electrolyte exhibits metastable modifications of the ZrO2, then the solid electrolyte is provided with a layer of ZrO2 having a stabilizer content which is sufficient at least to form a fully-stabilized zirconium dioxide, but preferably this zirconium dioxide contains somewhat more stabilizer. This design is particularly advantageous for the production of the sensors from ceramic foils according to laminated technology. It is then particularly advantageous to apply the ZrO2 layer only to the parts of the solid electrolytes where the electrodes are planned to be located. Furthermore it is advantageous to design this type of laminate with the maximum possible symmetry, for example by applying intermediate or top coatings on the reverse side of the laminate.</p> |
