GAS SENSOR ELEMENT AND GAS SENSOR

摘要

A gas sensor element includes a laminate formed of a detecting element section and a heater section, and a porous protection layer covering a forward end portion of the laminate. The detecting element section has one or more cells having a solid electrolyte body and a pair of electrodes. The heater section has a heater. Side surfaces of the solid electrolyte bodies in parallel with the direction of lamination are covered with dense insulating members. The cell-to-be-controlled is temperature controlled by the heater to 600° C. to 830° C. The porous protection layer is formed on the laminate from a forward end portion to a region which has a temperature of 500° C. or higher when the temperature control is performed, and the porous protection layer is not formed in a region which has a temperature of 300° C. or lower when the temperature control is performed.

主权项

1. A gas sensor element comprising:
a heater section including an insulator and a heater in the insulator; and a detecting element section laminated with the heater section to form a laminate, the laminate having a region having an operating temperature of 500° C. or higher and a region having an operating temperature of 300° C. or lower, the detecting element section including:
one or more cells, each of the one or more cells including a solid electrolyte body having side surfaces parallel to a lamination direction, and a pair of electrodes disposed on each solid electrolyte body, a temperature of a cell-to-be-controlled of the one or more cells controlled by the heater to a target control temperature of 600° C. to 830° C.; anda dense insulating member covering the side surfaces of each solid electrolyte body; and a porous protection layer formed on the laminate from a forward end to the region having the operating temperature of 500° C. or higher, and the porous protection layer not formed on the laminate in the region the region having the operating temperature of 300° C. or lower.