Metal oxide nanoparticles are usually used in a variety of applications including sensors, varistors, pigments, fillers, electrography and medical materials. Nanoparticles can be produced by several techniques such as precipitation, spray pyrolysis, thermal decomposition and hydrothermal synthesis. In particular, SC Water Hydrothermal Synthesis (scWHS) is an environmentally process for the production of potentially valuable metal oxide nanoparticles (ZnO, TiO2, ZrO2, LiFePO4, BaZrO3, Fe2O3, …) usually applied in the Nanotechnology.

Currently, most scWH syntheses are performed in batch reactor leading to thermal inertia which limits can be removed in a continuous synthesis process (thermal inertia, limited production...).

Continuous hydrothermal production process of oxides and hydroxides nanoparticles synthesized in sub and supercritical conditions. State diagram of water viewing the accessible domain of synthesis using this device.