The Mechanochemical Processing (MCP) technology is a novel, patented solid-state process for the manufacture of a wide range of nanopowders. Dry milling is used to induce chemical reactions through ball-powder collisions that result in nanoparticles formed within a salt matrix. Particle size is defined by the chemistry of the reactant mix, milling and heat treatment conditions. Particle agglomeration is minimized by the salt matrix, which is then removed by a simple washing procedure.

Ball mill acts as a low temperature chemical reactor. Reaction process results from focal heat and pressure at contact surface.

Chemical reactions occur at nanoscale . Particles are kept apart by salt matrix. Low temperature enables controlled particle formation.

Reaction product is heat treated. Solid phase chemistry prevents particles from agglomeration. Salt removed through simple washing steps.

The MCP process is distinguished from competing technologies by the solid-state nature of the process that enables the formation of equiaxed nanoparticles, with a narrow size distribution and low levels of agglomeration. A typical example is Advanced Nano's ~30 nm zinc oxide shown below.

Transmission electron micrograph of ~30nm zinc oxide showing an equiaxed shape and mono dispersed (non-agglomerated) suspension.

Particle size distribution curve for MCP ~30nm zinc oxide nanopowder showing a mean particle size of 30nm with a standard deviation of less than 4nm (measured by PCS).