US 12,216,075 B2
Gas sensor element and gas sensor
Ryo Onishi, Iwakura (JP); Yasuhide Kojima, Nagoya (JP); and Yusuke Watanabe, Nagoya (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK INSULATORS, LTD., Aichi (JP)
Filed on Sep. 23, 2021, as Appl. No. 17/482,648.
Application 17/482,648 is a continuation of application No. PCT/JP2020/010056, filed on Mar. 9, 2020.
Claims priority of application No. 2019-067137 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0011260 A1, Jan. 13, 2022
Int. Cl. G01N 27/407 (2006.01); G01M 15/10 (2006.01)
CPC G01N 27/4077 (2013.01) [G01M 15/102 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A gas sensor element comprising:
an element body including an oxygen-ion-conductive solid electrolyte layer; and
a protective layer that covers at least part of the element body, and has a thermal conductivity ratio R of 1.6 or higher, the thermal conductivity ratio R (=λs/λt) being a surface direction thermal conductivity λs [W/m K] to a thickness direction thermal conductivity λt [W/m K].