Abstract：The surface coating of inorganic film was an important way to improve the property of particles. The rare earth element Nd and SiO2 were mixed into super fine particles of ferric oxide to form ferric oxide composite pigment. The composition, chemical state and content of inorganic film on surface were analyzed by X-ray photoelectron spectroscopy (XPS). The inorganic film and rare earth doping coating of ferric oxide composite pigment were predicted. The results showed that the surface coating of Fe2O3 particles was good due to the weak reaction of Fe-O bond according to O 1s and Fe 2p spectra. The chemical shift of Si 2p, Nd 3d and Nd 4d indicated that Nd and Si atoms possibly entered into Fe2O3 crystal lattice. The O and Fe atoms were replaced so that the proportion of Fe-O was reduced. The new bonds were formed. In other words, the Nd-O-Si bond was formed on surface of composite particle. The rare earth atoms were successfully doped into SiO2 inorganic film coated by Fe2O3 particles. Since the rare earth element had abundant spectral features, the prepared pigment exhibited better color effect. The property of particles was improved.
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WANG Chen-xue. Study on the structure of surface coating of ferric oxide composite pigment by X-ray photoelectron spectroscopy. , 2016, 36(2): 22-26.
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