Conductive powder having copper as a main component

Abstract

The present application provides a conductive powder with copper as a main component, wherein D50 is 0.3 μm or more and 7.5 μm or less, the ratio of long diameter X to medium diameter Y is 1.0 or more and 3.0 or less, and the ratio of long diameter X to short diameter Z is 1.5 or more and 8.0 or less, and at least a part of the surface of the conductive powder has an aliphatic amine, the aliphatic amine is an aliphatic amine that, when the conductive powder with copper as a main component is heated from 38°C to 900°C at a temperature increasing rate of 10°C / min in an inert atmosphere by TG-MS, at least one peak is detected in a chromatogram of mass number 44, and the ratio of the area of the peak existing in a range of 250°C or more and 400°C or less to the area of the peak existing in a range of 250°C or more and 900°C or less is 0.9 or more. The conductive paste using the conductive powder can remove the surface treatment agent by low-temperature firing, and can form a dense conductor film.