Active Iron Powder, Heat Generating Composition, and Heat Generating Body

摘要: There is provided an active iron powder which suitable for a heat generating composition of body, excellent in rising properties and economy by using generally produced at present modifying its function into as raw material body. The invention concerned with to be contained capable upon contact air, characterized that the powder, part surface covered oxide film; thickness film from 3 nm 100 μm not more than 50% total powder.