| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas sensor element capable of easily providing a porous protective layer having approximately constant thickness to be targeted on the surface of a diffusion resistor when the diffusion resistor is provided in a tip portion of the element, and a method for manufacturing the same.SOLUTION: A gas sensor element 1 has a structure formed by laminating a solid electrolyte body 2 having oxygen ion conductivity, an insulator 3 forming a measurement gas space 30 to the solid electrolyte body 2 and a heater 4 for heating the solid electrolyte body 2. A diffusion resistor 5 for introducing a measurement gas G into the measurement gas space 30 under a predetermined diffusion resistance is provided in a tip portion 11 of the gas sensor element 1. In a portion including the diffusion resistor 5 on the tip surface 111 of the tip portion 11 of the element, an inclined surface 112 is formed to be inclined linearly from a state rectangular to the longitudinal direction L of the gas sensor element 1. A porous protective layer 6 having the property of permeating the measurement gas G and an approximately constant thickness is provided on the inclined surface 112. |
