公开(公告)号：US20140130572A1

公开(公告)日：2014-05-15

申请号：US13907230

申请日：2013-05-31

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shigehiro OTSUKA ,  Masaki ONKAWA ,  Toru IWANO ,  Satoshi TERAMOTO ,  Kuniharu TANAKA ,  Takeshi MITSUOKA

IPC: G01M15/10

CPC classification number: G01M15/102 ,  G01N27/4077

Abstract: A gas sensor element and a gas sensor incorporating the gas sensor element. The gas sensor element (100) includes a detection portion (150) including a solid electrolyte body (105) and a pair of electrodes (104) and (106) disposed on the solid electrolyte body; and a porous protection layer (20) covering the detection portion. The porous protection layer includes an inner porous layer (21) and an outer porous layer (23). The inner porous layer has a higher porosity than the outer porous layer. Further, the inner porous layer contains, as main components, ceramic particles (21a), and ceramic fiber filaments (21b), and the amount of the ceramic fiber filaments is 25 to 75 vol % based on the total amount of the ceramic particles and the ceramic fiber filaments taken as 100 vol %.

Abstract translation: 气体传感器元件和包含气体传感器元件的气体传感器。 气体传感器元件（100）包括：固体电解质体（105）和配置在固体电解质体上的一对电极（104）和（106）的检测部（150） 以及覆盖所述检测部的多孔保护层（20）。 多孔保护层包括内部多孔层（21）和外部多孔层（23）。 内部多孔层的孔隙率高于外层多孔层。 此外，内部多孔层含有陶瓷粒子（21a）和陶瓷纤维丝（21b）作为主要成分，陶瓷纤维丝的量相对于陶瓷粒子的总量为25〜75体积％， 陶瓷纤维长丝为100体积％。