ACr(2)O(4)/SiO2 (A = Zn, Cu, Cd) nanocomposites, their preparation and physical properties

0440072 - ÚACH 2015 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Holec, Petr - Vejpravová, J. - Plocek, Jiří - Němec, I. - Kitazawa, H. - Nižňanský, D.
ACr(2)O(4)/SiO2 (A = Zn, Cu, Cd) nanocomposites, their preparation and physical properties.
IOP conference series: Materials science and engineering. Vol. 18. Bristol: IOP Publishing, 2011, 032024. Symposium. ISSN 1757-8981.
[International Congress on Ceramics /3./. Osaka (JP), 14.11.2010-18.11.2010]
Grant CEP: GA ČR GAP108/10/1250
Klíčová slova: Magnetic-structure * Chlorine gas * Spinels * Sensors * Ceramic materials
Kód oboru RIV: CA - Anorganická chemie

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 - 1100 degrees C. The resulting samples were characterized by X-ray diffraction, High Resolution Transmission Electron Microscopy, and magnetic measurements.
Trvalý link: http://hdl.handle.net/11104/0243212