公开(公告)号：US20240210342A1

公开(公告)日：2024-06-27

申请号：US18579171

申请日：2022-06-16

Applicant: Nagaoka University of Technology ,  KOA Corporation

Inventor： Tomoichiro Okamoto ,  Kenichi Iguchi ,  Yukiko Ota ,  Ryosuke Komatsu ,  Zoku Ko ,  Tetsuro Tanaka

IPC: G01N27/12

CPC classification number: G01N27/125 ,  G01N27/123

Abstract: In a resistive oxygen gas sensor, an oxygen gas detection member for detecting oxygen gas contains, as a main component, a semiconductor material having a composition formula represented by RE(Ba2-x, REx)Cu3O, (wherein, RE is a rare earth element, x is 0≤x≤ 1.2, and y is 6.0≤y≤7.5).

公开(公告)号：US11977042B2

公开(公告)日：2024-05-07

申请号：US17040332

申请日：2019-03-20

Applicant: KOA CORPORATION

Inventor： Chika Ito ,  Ken Takahashi ,  Tetsuro Tanaka ,  Kenichi Iguchi

IPC: G01N27/12 ,  G01N27/407 ,  G01N27/416 ,  G01N27/419

CPC classification number: G01N27/128 ,  G01N27/12 ,  G01N27/125 ,  G01N27/4071 ,  G01N27/4073 ,  G01N27/4161 ,  G01N27/419 ,  C04B2235/3225 ,  C04B2235/3227

Abstract: An oxygen sensor for detecting gas concentration based on either an electric current value or a resistance value measured when a voltage is applied to a sensor element includes gaps formed between electrodes arranged in an element main body and ridges where surfaces of an element touch each other. These gaps will be escaping parts for expansion and contraction of electrode material that accompany thermal expansion and contraction of a sensor main body, and concentration of thermal stress at edge parts of the element main body may thus be eliminated, thereby alleviating thermal stress on the oxygen sensor. This allows provision of a gas sensor that controls generation of cracks in the element and that is stably usable over a long period of time.