| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gas sensor in which insulation is ensured between electrodes disposed in a reference oxygen chamber of a gas sensor element. <P>SOLUTION: A reference oxygen chamber 113 has the shape of a rectangular parallelepiped. A reference electrode 111 is disposed on a surface of a third solid electrolyte body 73 which is exposed to the reference oxygen chamber 113. A second outer electrode 117 is disposed opposite the reference electrode 111, on a surface of a second solid electrolyte body 77 which is exposed to the reference oxygen chamber 113. Specifically, a porous, insulative protection layer 165 containing an electrically insulative material such as alumina having a purity of 99.9% or higher is formed so as to cover the entire surface of the second outer electrode 117. A gap 167 filled with nothing is provided between the reference electrode 111 and the insulative protection layer 165. The thickness of the gap 167 is greater than the thickness of the insulative protection layer 165. <P>COPYRIGHT: (C)2013,JPO&INPIT |
