US 11,808,730 B2
Gas sensor element
Takayuki Sekiya, Nisshin (JP); Shota Kageyama, Nagoya (JP); and Yusuke Watanabe, Nagoya (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK INSULATORS, LTD., Nagoya (JP)
Filed on Oct. 31, 2019, as Appl. No. 16/669,558.
Application 16/669,558 is a continuation of application No. PCT/JP2019/011567, filed on Mar. 19, 2019.
Claims priority of application No. 2018-064017 (JP), filed on Mar. 29, 2018.
Prior Publication US 2020/0064302 A1, Feb. 27, 2020
Int. Cl. G01N 27/407 (2006.01); G01N 27/417 (2006.01); G01N 27/409 (2006.01)
CPC G01N 27/4071 (2013.01) [G01N 27/417 (2013.01); G01N 27/409 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A gas sensor element including a plurality of solid electrolyte layers stacked one over another, said gas sensor element comprising:
an electrochemical cell including electrodes formed over portions of said plurality of solid electrolyte layers;
a heater part capable of heating said gas sensor element; and
a gettering layer located between said plurality of solid electrolyte layers including an interlayer gettering layer portion and an electrode gettering layer portion, said electrode gettering layer portion located between said portions of said plurality of solid electrolyte layers and said electrodes, said gettering layer gettering impurities diffused inside the sensor element from a metal component of said electrodes and said heater part during driving of said gas sensor element,
wherein
said plurality of solid electrolyte layers are made of zirconia, and
said gettering layer is made of zirconia to which at least one selected from the group consisting of SiO2, Al2O3, zinc oxide, calcium carbonate, barium carbonate, magnesium carbonate, silicon nitride, aluminum nitride, titania, and spinel is added.