Mechanochemical synthesis of gamma-Bi_2O_3

摘要

A series of gamma-Bi_O_2 phases doped with Zn, Si, Pb and Fe was prepared by mechanochemical treatment of corresponding oxide mixtures with a nominal composition 6Bi_2O_3 centre dot MO_x (MO_x = ZnO, SiO_2, PbO) and 12Bi_2O_3 centre dot Fe_2O_3 using high-energy ball mill. The products are characterized by X-ray powder diffraction technique. Influence of milling conditions: milling time from 5 min to 10 h, milling medium (steel or ZrO_2) and injected mechanical power on unit-cell parameters and crystallinity of products, as well as on reaction kinetics are investigated and discussed.