US 12,241,852 B2
Gas sensor and method for producing alkaline earth ferrite
Shigenori Matsushima, Fukuoka (JP); Kenji Obata, Fukuoka (JP); Kenichi Iguchi, Nagano (JP); Yukiko Ota, Nagano (JP); Hisakazu Nagata, Nagano (JP); and Koichi Urano, Nagano (JP)
Assigned to National Institute of Technology, Tokyo (JP); and KOA Corporation, Nagano (JP)
Appl. No. 17/754,126
Filed by National Institute of Technology, Tokyo (JP); and KOA Corporation, Ina (JP)
PCT Filed Aug. 26, 2020, PCT No. PCT/JP2020/032227
§ 371(c)(1), (2) Date Mar. 24, 2022,
PCT Pub. No. WO2021/059839, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-173525 (JP), filed on Sep. 24, 2019.
Prior Publication US 2022/0291160 A1, Sep. 15, 2022
Int. Cl. G01N 27/12 (2006.01); C01G 49/00 (2006.01)
CPC G01N 27/125 (2013.01) [C01G 49/0036 (2013.01); C01P 2006/40 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A gas sensor, comprising:
a base material;
a first electrode and a second electrode arranged on the base material; and
a gas detection member connected to the first electrode and the second electrode, wherein
the gas detection member contains flaky particles of alkaline earth ferrite, wherein an electric resistance of the gas detection member is changed by reacting between oxygen adsorbed on a surface of the alkaline earth ferrite as negative charges with a gas.