Materials syntethis based on oxide system SiO2–P2O5–CaO–MgO was conducted by the sol-gel method. Tetraethyl orthosilicate (TEOS), phosphoric acid (H3PO4), calcium nitrate (Ca(NO3)2·4H2O) and magnesium nitrate (Mg(NO3)2·6H2O) in ethanol (C2H5OH) were used for preparation of solution. Viscosity of the solutions was 1,6–1,8 mm2/s on the first day. On the second day a precipitate was formed in solution. Chemical bonds in the solutions were identified by IR spectroscopy. Powder X-ray diffraction showed at 800°C in the samples fixed phases quartz SiO2, whitlockite (Ca2,589 Mg0,411 )(PO4)2, β-cristobalite high SiO2, stanfieldite Mg3Ca3(PO4)4. Chemical bonds in the powders were identified by IR spectroscopy. The surface of the powders and chemical composition was investigated by SEM and EPMA.
Перспективы развития фундаментальных наук : сборник научных трудов XIV Международной конференции студентов, аспирантов и молодых ученых, Россия, Томск, 25-28 апреля 2017 г.. Томск, 2017. Т. 2 : Химия. С. 169-171
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Химический факультет
Синтез и исследование физико-химических свойств материалов на основе системы SiO2-P2O5-CaO-MgO