SENSOR ELEMENT AND GAS SENSOR

• Main Authors: IWAI SHIHO, TSUJINO MASARU
• Format: Patent
• Language: English; Japanese
• Published: 10.05.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

SOLUTION: A sensor element 12 comprises: an element body 15; connector electrodes 161, 162 which are provided at one end in the longitudinal direction, of the element body; a gas introduction port 80 which is provided at other than the one end of the element body; and an element protective layer 72 which covers at least one of the principal faces 151, 152 of the element body. The element protective layer is separated into first partial layers 721, 741 and second partial layers 722, 742 by cut-off regions 36, 38, wherein the cut-off regions comprise dense layers 44, 46, gaps GA-GD of 10 μm or more are present in a portion between the dense layers and the first partial layers and/or a portion between the dense layers and the second partial layers.EFFECT: A sensor element and a gas sensor can be provided, which enable reaching of water at connector electrodes to be suitably suppressed.SELECTED DRAWING: Figure 2 【解決手段】センサ素子１２は、素子本体１５と、素子本体の長手方向の一方の端部に備えられたコネクタ電極１６１、１６２と、素子本体のうちの一方の端部を除く部位に備えられたガス導入口８０と、素子本体の少なくとも一方の主面１５１、１５２を被覆する素子保護層７２と、を備え、素子保護層は、遮断領域３６、３８によって第１部分層７２１、７４１と第２部分層７２２、７４２とに分離されており、遮断領域には緻密層４４、４６が備えられ、緻密層と第１部分層との間の部位と、緻密層と第２部分層との間の部位とのうちの少なくともいずれかに１０μｍ以上の隙間ＧＡ～ＧＤが存在している。【効果】コネクタ電極に水が達するのを良好に抑制し得るセンサ素子及びガスセンサを提供することができる。【選択図】図２