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US 2017/0284958 A1Published application
Sensor element and gas sensor
AssigneeNGK Insulators, Ltd.
InventorsAtsushi WATANABE, Takashi SUZUKI, Shuichi OZAWA, Hirohito KIYOTA, Satoko MORIYAMA, Shiho IWAI
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Abstract
A sensor element 101 includes an element main body 101a that includes oxygen ion-conductive solid electrolyte layers (1 to 6), and a porous protective layer 90 that covers at least part of the element main body 101a. The porous protective layer 90 includes a porous inner protective layer 92 and a porous outer protective layer 91 disposed on the outer side of the inner protective layer 92 and having a smaller average pore diameter than the inner protective layer 92.
Claims16
A sensor element comprising:
- an element main body including an oxygen ion-conductive solid electrolyte layer;
- and
- a protective layer covering at least part of the element main body and including a porous inner protective layer and a porous outer protective layer disposed on an outer side of the inner protective layer, the outer protective layer having a smaller average pore diameter than the inner protective layer.
Dependencies are inferred from the claim text.