Effect of the Density of Iron Nanopowders on the Parameters of Their Ignition during Heating in Air

Abstract

The ignition of iron nanopowders of bulk density and those compacted to a relative density of 0.3–0.5 during heating in air has been studied. The ignition temperature of the compacted samples is independent of the heating rate and is 100–115°C. The durations of the active stages—ignition and filtration combustion—under identical heating mode depend on the sample density, which makes it possible to develop methods to store iron nanopowders in the compacted state.