Synthesis of strontium fluoride nanoparticles in a microreactor with intensely swirling flows

Abstract

The technique of micromixing was used for synthesis of SrF 2 nanopowders in a microreactor with intensely swirling flows. The chemical reaction between aqueous solutions of strontium nitrate (C(Sr(NO 3 ) 2 ) = 0.15 -0.45 M) and potassium fluoride (C(KF) = 0.3 -0.9 M) was realized in a microreactor with intensely swirling flows with reagent consumption 1.5 -3.5 L/min. Colloidal solutions were obtained, during the settling of which SrF 2 powders were isolated without crystallographic faceting. An increase in the rate of reagent flow has negligible effect on the size of coherent scattering regions D, while an increase in the concentration of solutions leads to an increase in D from ∼ 20 to ∼ 30 nm. KEYWORDS strontium fluoride, precipitation, chemical reaction, micromixing ACKNOWLEDGEMENTS This work was done as a part of State assignment of the Institute of Silicate Chemistry (Project No.