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- Title
Study of structure and properties of ZnO–Bi<sub>2</sub>O<sub>3</sub>–P<sub>2</sub>O<sub>5</sub> glasses.
- Authors
Jirák, Josef; Koudelka, Ladislav; Pospíšil, Jaroslav; Mošner, Petr; Montagne, Lionel; Delevoye, Laurent
- Abstract
Glasses of the ternary system ZnO–Bi2O3–P2O5 were prepared and studied in two compositional series 50ZnO– xBi2O3–(50 − x)P2O5 and (50 − y)ZnO– yBi2O3–50P2O5. Two distinct glass-forming regions were found in the 50ZnO– xBi2O3–(50 − x)P2O5 glass series with x = 0–10 and 20–35 mol.% Bi2O3. All prepared Bi2O3-containing glasses reveal a high chemical durability. Small additions of Bi2O3 (∼5 mol.%) improve thermal stability of glasses. All glasses crystallize on heating within the temperature range of 505–583 °C. Structural studies by Raman and 31P MAS NMR spectroscopies showed the rapid depolymerisation of phosphate chains within the first region with x = 0–15 and the presence of isolated Q0 phosphate units within the second region with x = 20–35. Raman studies showed that bismuth is incorporated in the glass structure in BiO6 units and their vibrational bands were observed within the spectral region of 350–700 cm−1. The evolution of properties and the spectroscopic data are both in accordance with a network former effect of Bi2O3.
- Subjects
GLASS; TERNARY system; NUMBER systems; THERMAL analysis; ANALYTICAL chemistry; THERMOGRAVIMETRY; TEMPERATURE; RAMAN effect; HEATING
- Publication
Journal of Materials Science, 2007, Vol 42, Issue 20, p8592
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-007-1848-7