GAS SENSOR ELEMENT

• Main Authors: WATANABE YUSUKE, HIRAKAWA TOSHIHIRO, TAKAHASHI KIRARI, NIIZUMA SHOTARO
• Format: Patent
• Language: English; Japanese
• Published: 11.04.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

To prevent the deterioration of measurement accuracy while reducing the manufacturing cost of a gas sensor element.SOLUTION: A gas sensor element according to one aspect of the present invention comprises: a laminate which is constituted by laminating a plurality of solid electrolyte layers, each having oxygen ion conductivity, and which includes an internal space constituted so as to accept the gas to be measured from the outside, a first plane adjoining the internal space, and a second plane adjoining an external space; a first pump electrode provided to the first plane; a second pump electrode provided to the second plane; a first lead constituted on the first plane so as to extend from the first pump electrode; and a second lead constituted on the second plane so as to extend from the second pump electrode and electrically connecting to the first lead. At least one of the first and second leads is constructed in such a shape that the maximum current density is 3.5 A/mm2 or less.SELECTED DRAWING: Figure 2A 【課題】ガスセンサ素子の製造コストの低減を図りつつ、測定精度の悪化を抑制する。【解決手段】本発明の一側面に係るガスセンサ素子は、それぞれ酸素イオン伝導性を有する複数の固体電解質層を積層することで構成される積層体であって、被測定ガスを外部から受け入れるように構成される内部空間、内部空間に隣接する第１面、及び外部空間に隣接する第２面を備える積層体と、第１面に設けられる第１ポンプ電極と、第２面に設けられる第２ポンプ電極と、第１面において、第１ポンプ電極から延びるように構成される第１リードと、第２面において、第２ポンプ電極から延びて、第１リードと電気的に接続するように構成される第２リードと、を備える。第１リード及び第２リードの少なくとも一方は、最大電流密度が３．５Ａ／ｍｍ2以下となる形状に構成される。【選択図】図２Ａ