Вплив постійного магнітного поля середньої величини на формування наночастинок магнетиту в водній іонообмінній реакції осадження з надлишком лугу

• Datum: 2011
• Hauptverfasser: Brikov, E. S., Zhuravskij, D. V., Mikheev, V. A., Novikov, V. F., Smirnov, I. A.
• Format: Artikel
• Sprache: Russisch
• Veröffentlicht: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2011
• Online Zugang: https://www.cpts.com.ua/index.php/cpts/article/view/93
• Назва журналу: Chemistry, Physics and Technology of Surface

The results of experiments are presented on the influence of external middle magnetostatic field on the aqueous ion-exchange reaction of magnetite precipitation in alkaline medium. The shape and size of nanoparticles are obtained from powders by ultrasound dispersions are studied by means of atomic and magnetic probe microscopy. Diffraction and scattering of X-rays on synthesized powders are investigated. It is revealed that when field increases, deflection of particle sizes from the average is decreased and their shape becomes disk-like (<D>=70 nm with H = 473 kА/m); the diffusion background is increased on the diffraction curves at small angles, structural peaks vanish, the volume of reaction products is decreased. Some preliminary considerations are presented on the probable physical features of the effect of magnetic field on the formation of nanoparticles. In particular, the influence is analyzed of a magnetostatic field on ion recombination in the reaction as well as on the properties typical of separate condensation stages.