| 摘要 |
Provided are: a sensor element (1) which detects a particulate matter in a gas to be measured; and a particulate matter detection sensor (4) which is provided with this sensor element. The sensor element (1) comprises: an insulating base (2) having an adhesion surface (21) to which a particulate matter adheres; and a particulate matter detection part (3) which is formed in the adhesion surface (21). The particulate matter detection part (3) is formed by having at least a pair of detection electrodes (31), which have different polarities and face each other, exposed at least partially in the adhesion surface (21). The detection electrodes (31) are mainly composed of an alloy of Pt and at least one metal selected from the group consisting of Rh, Ru, Ir and Os. The content of the above-mentioned at least one metal in the alloy is 0.5-50% by mass relative to 100% by mass of the total of Pt and the above-mentioned at least one metal. |
