| abstract |
[Problem] Provided is a composite powder that is stable even when present in water for a long period of time. [Solution] The composite powder results from forming, on the surface of an inorganic powder, a first coating layer comprising a water-repellant organic compound, and a second coating layer formed on the first coating layer and comprising at least one compound selected from the group consisting of silicon dioxide, a hydrate of silicon dioxide, an oxide of aluminum, and a hydroxide of aluminum. |