| Автор | Y M Moustafa |
| Дата выпуска | 1999-09-07 |
| dc.description | Glasses in the systems xFe<sub>2</sub>O<sub>3</sub>-(45-x)K<sub>2</sub>O-55P<sub>2</sub>O<sub>5</sub> and yFeCl<sub>3</sub>-10Fe<sub>2</sub>O<sub>3</sub>-(35-y)K<sub>2</sub>O-55P<sub>2</sub>O<sub>5</sub> have been prepared over a wide range of composition (x = 0-11.5 mol% and y = 0-30 mol%). The thermal expansion coefficient, glass transition temperature, density and dissolution rate in HCl (1.6 M) at 60 °C were investigated. Results indicate that increasing Fe<sub>2</sub>O<sub>3</sub> content in potassium phosphate glasses increases the density and glass transition temperature, while the thermal expansion coefficient and dissolution rate decrease. The same behaviours were obtained when FeCl<sub>3</sub> content was increased. These results indicate that the chemical durability of potassium phosphate glasses would be enhanced upon addition of Fe<sub>2</sub>O<sub>3</sub> and/or FeCl<sub>3</sub>. The infra-red spectral analyses of the glasses reveal a significant structural change in the glass matrix depending on the composition. The incorporation of iron (as iron oxide or iron chloride) into the potassium phosphate matrix depolymerizes the glass structure through formation of P-O-Fe(III), P-O-Fe(II) and P-Cl bonds. The depolymerization process was found to be more sensitive for glasses with x+y<25 mol%. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Characterization of iron oxychloride potassium phosphate glasses |
| Тип | paper |
| DOI | 10.1088/0022-3727/32/17/319 |
| Electronic ISSN | 1361-6463 |
| Print ISSN | 0022-3727 |
| Журнал | Journal of Physics D: Applied Physics |
| Том | 32 |
| Первая страница | 2278 |
| Последняя страница | 2286 |
| Аффилиация | Y M Moustafa; Glass Research Group, Physics Department, Mansoura University, Mansoura 35516, Egypt |
| Выпуск | 17 |
