An XPS Study on the Interaction at the Fe3O4/SiO2 Boundary on the Surface of Composite Microspheres Prepared via a Shear- Compressive Mechanical Route [Translated]†

Abstract

Composite microspheres of polystyrene or silica coated with a double layer of Fe3O4/SiO2 were prepared via mechanical routes using a shear – compressing type machine, specially designed for the purpose of surface coating. The binding energy of Fe2p3/2 measured by XPS increased, while that of Si2p decreased after composite formation. These synchronized shifts increased with increasing intensity of mechanical stress. After heat treatments, chemical interaction during mechanical treatment at the Fe3O4/SiO2 interlayer in a composite particle was verified. The fine structure of the interlayer boundary was also examined in detail by electron microscopy.† This report was originally printed in J. Soc. Powder Technology, Japan. 31(1), 18-24 (1994) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.