Synthesis of cobalt ferrite nanoparticles by means of confined impinging-jets reactors.

The process of cobalt ferrite synthesis by means of confined impinging jets was studied experimentally at relative low temperatures (20°C to 30°C) and ambient pressure. Unlike hydrothermal synthesis usually performed at high pressures and temperatures (400°C to 450°C), impinging jets synthesis allows to produce small particles (approx. 8 nm mean size) within few milliseconds in a continuous flow. Due to short contact of reagents heir fast and effective mixing it was possible to avoid co-products formation and to exclude the growth of crystallines. Ability to control stable and effective hydrodynamics and the fast separation of products from co-products results in the optimal conditions for fast reaction of precipitation practically excluding building of large particles and aggregates.