| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas sensor element hardly causing damage or failure due to mechanical stress and thermal stress and having good durability, responsiveness and superior early activity. SOLUTION: This gas sensor element is formed by stacking a solid electrolyte plate 13, a spacer plate 14 having a reference gas chamber 10, and a heater board 15. A corner part 100 at a closed end 102 of the reference gas chamber 10 is constituted by a curved surface, and in the section along a plane passing the center in the cross direction and parallel to the longitudinal direction intersecting perpendicularly to the cross direction, the radius of curvature of the corner part 100 is 1 mm to 20 mm. |
