Gas-sensing device using solid electrolyte plate

摘要

A gas-sensing device is cooled down from 1470° C. to 457° C. after calcination when manufactured. The device comprises a solid electrolyte plate made of partially stabilized zirconia, a measurement electrode disposed on the plate to face an atmosphere of a gas to be measured, and a reference electrode disposed on the plate to face an atmosphere of a reference gas. A gas-permeable diffusion layer is laminated on the plate to cover the measurement electrode. A gas-non-permeable shield layer is laminated on the diffusion layer. A reference-gas-chamber forming plate is laminated on the solid electrolyte plate to form a reference gas chamber. One or more of the shield layer, diffusion layer, and reference-gas-chamber forming plate are made of a material that differs in a contraction percentage from the solid electrolyte plate by an amount of 0.3% or less.