High tap density and efficient aerosolization of anisotropic particles using dynamic methods

Airborne obscurants are used to modify electromagnetic wave propagation between a potential target and a posed threat or observer. Current developments in nanoparticle production methods enable precisely engineered obscurants with nanometer level control over particle size and shape. Modeling studies predict an order of magnitude increase over current performance levels with high aspect-ratio (rod, flake, disk shaped) obscurant particles. The major practical challenge to achieving high efficiency with such fine obscurant particles is realizing a high packing density which can also be completely aerosolized into large clouds during dissemination. The proposed Phase II project uses an innovative technology called Dynamic Magnetic Compaction (DMC) to pack fine particles to high density which can then be fully disseminated. The successful use of DMC for increasing grenade efficiency has been demonstrated during the Phase I project. This process could be used with different grenade powders such as brass flakes, graphite fibers, and oxide powders for use in smoke and obscurant applications.