TeO_2-B_2O_3-Fe_2O_3 GLASSES AS A MATRIX FOR FERROMAGNETIC NANOCOMPOSITES

摘要

Structural evolution in TeO_2-B_2O_3-Fe_2O_3 glasses with liquid phase separation is studied by TEM, XRD and EPMA in order to find medium for incorporation of Fe_3O_4 nanoparticles and to obtain nanostructured magnetic materials. Fe_3O_4 nanopartides are previously obtained by coprecipitation in alkali medium and their shape and size distribution is investigated by HRTEM The explanation of the difference in the structure of glassy matrix and nanocomposites is made by the influence of the furnace magnetic field on the differently distributed Fe containing immiscibility formations.