公开(公告)号：EP3029458A1

公开(公告)日：2016-06-08

申请号：EP15197867.3

申请日：2015-12-03

申请人： NGK Insulators, Ltd.

发明人： SAKAKIBARA, Hironori ,  OZAWA, Shuichi ,  FUJITA, Hiroki ,  MAEDA, Shinsaku

IPC分类号： G01N27/407 ,  G01N27/406

CPC分类号： G01N27/419 ,  G01N27/4075 ,  G01N27/4077 ,  G01N27/409 ,  G01N27/4166

摘要： A sensor element 101 includes a sensor element main body 101a including an oxygen ion-conductive solid electrolyte layer (each of layers 1 to 6) and a porous protective layer 91 covering at least part of the sensor element main body 101a. Then, the porous protective layer 91 has the value of the number of interfaces in a unit thickness direction, which is the number of particle interfaces of constituent particles every 100 µm in the thickness direction, of 15 or more and 250 or less. Also, the porous protective layer 91 has the value of the ratio of the number of interfaces (= the number of interfaces in a unit surface direction/the number of interfaces in a unit thickness direction) of the number of interfaces in a unit surface direction, which is the number of particle interfaces of constituent particles every 100 µm in the surface direction perpendicular to the thickness direction, to the number of interfaces in a unit thickness direction of more than 0 and 0.7 or less. The value of the number of interfaces in a unit thickness direction is preferably 30 or more. The thickness of the porous protective layer 91 may be 500 µm or less.

摘要翻译： 传感器元件101包括具有氧离子传导性固体电解质层（层1〜6）的传感器元件主体101a和覆盖传感器元件主体101a的至少一部分的多孔保护层91。 然后，多孔保护层91具有在厚度方向上每100μm的构成粒子的粒子界面数为单位厚度方向的界面数为15以上且250以下的值。 此外，多孔保护层91具有在单位面方向上的界面数量的界面数（=单位面方向的界面数/单位厚度方向的界面数）的比率的值 是与垂直于厚度方向的面方向每100μm的构成粒子的粒子数相对于单位厚度方向的界面数多于0以上且0.7以下的数量。 单位厚度方向的界面数优选为30以上。 多孔保护层91的厚度可以为500μm以下。