Синтез и исследование физико-химических свойств материалов на основе системы SiO2-P2O5-CaO-MgO
| Parent link: | Перспективы развития фундаментальных наук=Prospects of Fundamental Sciences Development: сборник научных трудов XIV Международной конференции студентов, аспирантов и молодых ученых, г. Томск, 25-28 апреля 2017 г./ Национальный исследовательский Томский политехнический университет (ТПУ) ; под ред. И. А. Курзиной, Г. А. Вороновой.— , 2017 Т. 2 : Химия.— 2017.— [С. 169-171] |
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| Summary: | Заглавие с экрана 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. |
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2017
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| Online Access: | http://earchive.tpu.ru/handle/11683/44514 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=624533 |