Investigation of the Surface
of Mechanically Activated Manganese Oxides
A. V. FETISOV1, G. A. KOZHINA2, V. B. FETISOV3 and E. A. Pastukhov1
1 Institute of Metallurgy, Ural Branch of the Russian Academy of Sciences,
Ul. Amundsena 101, Yekaterinburg 620016 (Russia),
fetisovav@mail.ru
2 Ural State Economics University,
Ul. 8 Marta 62, Yekaterinburg 620218 (Russia),
3 Ural State Agricultural Academy,
Ul. Karla Libknekhta 42, Yekaterinburg 620075 (Russia)
Keywords: mechanical activation, manganese oxides, surface, X-ray photoelectron spectroscopy
Pages: 521–530
Abstract
The surface of oxides Mn3O4, Mn2O3 and MnO2 subjected to mechanical activation with the help of high-intensity grinding was studied by means of X-ray photoelectron spectroscopy. It was discovered that the surface layers of all the three oxides were transformed during mechanical activation into Mn2O3 possessing increased chemical stability against environmental action. The results are due to the thermal effect and the catalytic action of extrinsic iron in the surface layer of MnmOn particles.
UDC 546.713'712–31'713–31'714–31:544.3.032.2:543.428.4
|
