Effect of Mechanical Activation of Highly Disperse SiO₂/α-Fe₂O₃ Mixtures on Distribution of Valence Electrons

• Date: 2015
• Main Authors: Zaulychnyy, Ya.V., Gun’ko, V.M., Yavorskyi, Y.V., Zarko, V.I., Piotrowska, S.S., Mishchenko, V.M.
• Format: Article
• Language: English
• Published: Інститут металофізики ім. Г.В. Курдюмова НАН України 2015
• Series: Металлофизика и новейшие технологии
• Subjects: Строение и свойства наноразмерных и мезоскопических материалов
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/112276
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Effect of Mechanical Activation of Highly Disperse SiO₂/α-Fe₂O₃ Mixtures on Distribution of Valence Electrons / Ya. V. Zaulychnyy, V. M. Gun’ko, Y. V. Yavorskyi, V. I. Zarko, S. S. Piotrowska, and V. M. Mishchenko // Металлофизика и новейшие технологии. — 2015. — Т. 37, № 8. — С. 1063-1075. — Бібліогр.: 27 назв. — англ.

The crystal and electronic structures of SiO₂/α-Fe₂O₃ mixtures are analysed using X-ray diffraction and ultra-soft X-ray emission spectroscopy. The energy redistributions of the Fesрd, Sisp, and Op valence electrons due to changes in the mass ratio (20/80, 50/50, 80/20) of SiO₂ and α-Fe₂O₃ in the mixtures are studied. The ultra-soft FeLα, SiLα, and OKα X-ray emission spectra of SiO₂/α-Fe₂O₃ mixtures are compared with those of individual iron oxide and silica powders. Interatomic interactions of surface atoms of adjacent particles occur owing to high local pressures and temperatures under mechanical treatment of the composition. Electrons’ transfer from silicon cations to oxygen anions is observed as a result of the mechanical activation of SiO₂/α-Fe₂O₃ mixtures.