Table 4 Glass composition, S/I and Si/Al ratios, density ρ, percentage of four-coordinated boron (BIV), non-bridging O per Si tetrahedron and fusion temperature Tf and glass transition temperature Tg
Glass | Chemical composition (el mol%) | S/I | Si/Al | ρ (g.cm-3) | BIV (%) | NBO/Si | Tf (°C) | Tg (°C) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Si | B | Al | Ca | Na | O | ||||||||
B6A4 | 20.1 | 5.5 | 4.2 | 1.8 | 7.8 | 60.5 | 0.3 | 5 | 2.46 ± 0.01 | 50 | 0.22 | 1500 | 606 ± 5 |
B11A3 | 16.8 | 10.5 | 3.4 | 1.8 | 7.4 | 60.0 | 0.6 | 5 | 2.45 ± 0.01 | 44 | 0.18 | 1350 | 587 ± 5 |
B14A3 | 14.4 | 14.1 | 3.0 | 1.7 | 7.2 | 59.7 | 0.9 | 5 | 2.43 ± 0.01 | 39 | 0.16 | 1100 | 576 ± 5 |
B11A6 | 14.9 | 10.8 | 5.6 | 1.7 | 7.2 | 59.8 | 0.6 | 3 | 2.42 ± 0.03 | 30 | 0.12 | 1400 | 580 ± 5 |
B10A2 | 18.3 | 9.7 | 2.3 | 1.7 | 7.7 | 60.2 | 0.6 | 8 | 2.51 ± 0.01 | 52 | 0.21 | 1400 | 580 ± 5 |
B10A1 | 19.1 | 10.3 | 0.8 | 1.8 | 7.7 | 60.4 | 0.6 | 24 | 2.49 ± 0.01 | 59 | 0.23 | 1400 | 594 ± 5 |
