Publikace na Přírodovědecká fakulta, Matematicko-fyzikální fakulta |
2011
Abstrakt
This article presents preparation and characterization of zinc, copper and cadmium chromites nanocrystals embedded in a silica matrix. The ZnCr2O4/SiO2, CuCr2O4/SiO2 and CdCr2O4/SiO2 samples were prepared by a conventional sol-gel method using HNO3 as an acid catalyst, formamide as a modifier, methanol as a solvent and TEOS.
Final heat treatment of the nanocomposites was carried out at temperatures in the range of 900 - 1100oC. The resulting samples were characterized by X-ray diffraction, High Resolution Transmission Electron Microscopy, and magnetic measurements.