GAS SENSOR ELEMENT AND METHOD OF MANUFACTURING THE SAME

摘要

A gas sensor element includes a solid electrolyte body having oxygen ion conductivity and electrode layers formed on both surfaces of the solid electrolyte body configuring a pair of electrodes. The gas sensor element detects concentration of a selected component included in a measured gas. In the gas sensor element, closed pores having an average pore diameter of 5 nm or more and 120 nm or less are dispersed in the electrode layers, porosity measured by cross-sectional observation of the electrode layers is 1% or more and 18% or less, and 90% or more of the closed pores is dispersed within metal grains forming the electrode layers.