Fig. 1
The DSC thermogram of tantalum based glassceramics showing crystallization temperature (Tc).
Table 1
Glass transition temperature Tg and crystallization temperature Tc.
| Sample ID | Chemical composition (mol%) | Glass transition temperature [Tg] °C | Crystallization temperature [Tc] °C |
|---|---|---|---|
| Ta0 | 46.1SiO2–0Ta2O5–26.9CaO–24.4Na2O–2.6P2O5 | 546.9 | 837.7 |
| Ta0 | 1 46.0SiO2–0.1Ta2O5–26.9CaO–24.4Na2O–2.6P2O5 | 540.1 | 824.6 |
| Ta0 | 5 45.6SiO2–0.5Ta2O5–26.9CaO–24.4Na2O–2.6P2O5 | 506.8 | 818.9 |
| Ta1 | 45.1SiO2–1Ta2O5–26.9CaO–24.4Na2O–2.6P2O5 | 449.4 | 763.1 |
| Ta3 | 43.1SiO2–3Ta2O5–26.9CaO–24.4Na2O–2.6P2O5 | 312.4 | 709.6 |
Fig. 2
Comparative X-ray diffraction patterns of (a) Ta0, (b) Ta0.1, (c) Ta0.5, (d) Ta1, (e)
Fig. 3
Change in crystallite size with Ta2O5 concentration using Scherer’s formula.
Fig. 4
SEM micrographs of surfaces of glass-ceramics (a) Ta0, (b) Ta0.1, (c) Ta0.5, (d) Ta1 and (e) Ta3, respectively.
Fig. 5
The variation of grain size and porosity with change in Ta2O5 concentration (mol%).
Fig. 6
Apparent density and compressive strength as function of Ta2O5 concentration in mol%.
Fig. 7
The XRD patterns for (a) Ta0, (b) TA0.1, (c) Ta0.5, (d) Ta1 and (e) Ta3 glass-ceramics after 30-day immersion in Stimulated Body Fluid (SBF).
Fig. 8
SEM-EDX micrographs of surfaces of glassceramics (a) Ta0, (b) Ta0.1, (c) Ta0.5, (d) Ta1 and (e) Ta3 after soaking in SBF for 30 days.