Petr Onushchenko
Accepted Abstracts: J Material Sci
Copper chloride nanocrystals in potassium aluminoborate and sodium borosilicate glass matrices were studied by small-angle X-ray scattering (SAXS) technique. Copper chloride emerges from initial glass during thermal treatment in drops of liquid. The drop sizes and hence the sizes of crystals after cooling depend on the temperature and treatment duration. range is 1-50 nm. SAXS technique allows phase transitions of CuCl to be studied. During the cooling process, the halide phase reaches the supercooled liquid state crystallizing at a temperature considerably lower than that of the solidus. The size dependence of phase transition temperatures was determined, the less the crystal (drop) sizes the lower the temperatures of phase transitions. The X-ray diffraction analysis revealed the presence of hexagonal modification of CuCl nanocrystals at room temperature, while hexagonal modification of CuCl in macroscopic systems has only been found to exist above 407°C. It was found that using different variants of thermal treatment, it is possible to obtain samples with different content of cubic and hexagonal nanocrystals, to achieve complete dissolution of hexagonal crystals or, by quenching, to get amorphous phase. bokov@isc1.nw.ru Biography Petr Onushchenko graduated with Master Degree in Physics from Saint-Petersburg State University in 2011. Now he is a junior researcher at Institute of Silicate Chemistry of Russian Academy of Sciences, Department of Glass Structure and Properties. He studies the glass structure using small-angle X-ray scattering methods. He was awarded twice at Young Scientists Conference of Institute Silicate Chemistry of RAS in 2011 and 2012. He already has 5 papers published in Russian Journal of Glass Physics and Chemistry.
Journal of Material Sciences & Engineering received 3677 citations as per Google Scholar report
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