NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2018, 9 (6), P. 763–769
Solid-phase interaction in ZrO2–Fe2O3 nanocrystalline system
S. A. Kirillova – St. Petersburg State Electrotechnical University “LETI”, ul. Professora Popova, 5, St. Petersburg, 197376, Russia; refractory-sveta@mail.ru
O.V. Almjasheva – St. Petersburg State Electrotechnical University “LETI”, ul. Professora Popova, 5, St. Petersburg, 197376, Russia; almjasheva@mail.ru
V.V. Panchuk – St. Petersburg State University, Universitetskaya nab., 7–9, St. Petersburg, 199034, Russia; vitpan@mail.ru
V. G. Semenov – St. Petersburg State University, Universitetskaya nab., 7–9, St. Petersburg, 199034, Russia; val_sem@mail.ru
Based on the results of X-ray phase analysis and M¨ossbauer spectroscopy, it was demonstrated that in the ZrO2–Fe2O3 system, represented by the mechanical mixture of m–ZrO2 (142 nm) and α-Fe2O3 (432 nm) nanoparticles, being heated above the temperature corresponding to the melting temperature of the two-dimensional nonautonomous phase, transformation of α-Fe2O3 occurs resulting in appearing of the X-ray amorphous magnetically disordered state localized on the surface of ZrO2 nanoparticles in the form of a thin layer. Transformation pattern in ZrO2–Fe2O3 nanocrystalline system has been introduced.
Keywords: nanostructures, iron-zirconia, surface, X-ray diffraction, Mössbauer spectroscopy.
PACS 64.75.+g; 76.20.+q
DOI 10.17586/2220-8054-2018-9-6-763-769