OXYGEN SENSOR ELEMENT AND METHOD FOR MANUFACTURING SAME

• Main Authors: OKAMOTO TOMOICHIRO, TANAKA TETSURO, IGUCHI KENICHI, OTA YUKIKO, KOMATSU RYOSUKE, NISHIZAWA KATSUHIDE
• Format: Patent
• Language: Chinese; English
• Published: 06.02.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

Provided is an oxygen sensor element capable of saving power without impairing sensor characteristics. Therefore, a structure in which the outer surface of a ceramic sintered body as a sensing layer composed of the component LnBa2Cu3O7-delta (Ln is a rare earth element) is covered by a thermal insulation layer is adopted, the thermal insulation layer uses a thermal insulation material of the component Ln2BaCuO5, and 20 mol% of LnBa2Cu3O7-delta is added to the component. Thus, since the sintering behavior of the heat insulating layer is close to the sintering behavior of the sensing layer, interlayer peeling or generation of cracks can be prevented, and by using a sandwich structure in which the sensing layer is sandwiched by the heat insulating layer, the amount of heat dissipated from the sensing layer can be reduced and power can be saved. 本发明提供一种能够不损害传感器特性地节省功率的氧传感器元件。为此，采用了通过隔热层对由组分LnBa2Cu3O7－δ(Ln为稀土类元素)构成的作为传感层的陶瓷烧结体的外表面进行覆盖的结构，该隔热层使用了组分Ln2BaCuO5的隔热材料，并且该组分中添加了20mol％的LnBa2Cu3O7－δ。从而，由于隔热层的烧结行为与传感层的烧结行为接近