Keywords
colloid crystals
iron oxides
nanoparticles
opal-like matrices
silica
template synthesis
χ-Fe2O3
Abstract
Nanoparticles of ε-Fe2O3 were obtained by template synthesis in the pores of opal-like matrices. The maximum content of ε-Fe2O3 is achieved upon calcination at 1000 °C for 2–4 h. The content of ε-Fe2O3 in a mixture of modifications of iron oxides reaches 80–90%, which is confirmed by the data of X-ray diffraction analysis, Mössbauer spectroscopy and magnetometry experiments.
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