<abstract xmlns="http://www.w3.org/1999/xhtml">The mechanical properties of silicate glass-ceramics were evaluated based on the compressive strength tests. It was found that Ta2O5 addition improved densification, refinement of the microstructure and toughening of the bodies. The maximum compressive strength of the bodies with 1 mol% Ta2O5 was increased 3-fold (245.92 ±0.3 MPa) in comparison to undoped glass-ceramics which was measured to be 89.04 ±0.3 MPa, while for 3 mol% it became 4-fold (387.12 ±0.4 MPa) greater. The addition of Ta2O5 stabilized the system by controlling the biodegradation of the glass-ceramics. It effectively depressed the apatite formation as by addition of 3 mol% Ta2O5 no apatite layer was observed. It may be concluded from this study that mechanical and physical properties can be improved by the addition of Ta2O5, but at a cost of bioactivity. Still the optimized composition having Ta2O5 ⩽ 1 mol% may provide appropriate strength of biomaterials for high load bearing applications.</abstract>

The mechanical properties of silicate glass-ceramics were evaluated based on the compressive strength tests. It was found that Ta2O5 addition improved densification, refinement of the microstructure and toughening of the bodies. The maximum compressive strength of the bodies with 1 mol% Ta2O5 was increased 3-fold (245.92 ±0.3 MPa) in comparison to undoped glass-ceramics which was measured to be 89.04 ±0.3 MPa, while for 3 mol% it became 4-fold (387.12 ±0.4 MPa) greater. The addition of Ta2O5 stabilized the system by controlling the biodegradation of the glass-ceramics. It effectively depressed the apatite formation as by addition of 3 mol% Ta2O5 no apatite layer was observed. It may be concluded from this study that mechanical and physical properties can be improved by the addition of Ta2O5, but at a cost of bioactivity. Still the optimized composition having Ta2O5 ⩽ 1 mol% may provide appropriate strength of biomaterials for high load bearing applications.

Influence of Ta2O5 doping on mechanical and biological properties of silicate glass-ceramics

Department of Physics, Lahore College for Women University, Lahore,

Government College for Women University, Sialkot,

CASP, Government College University, Lahore,

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Influence of TaO doping on mechanical and biological properties of silicate glass-ceramics

The mechanical properties of silicate glass-ceramics were evaluated based on the compressive strength tests. It was found that Ta2O5 addition improved...

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

Influence of Ta₂O₅ doping on mechanical and biological properties of silicate glass-ceramics

Article Category: Research Article

Published Online: Apr 27, 2016

Page range: 13 - 18

Received: Jan 17, 2015

Accepted: Nov 23, 2015

DOI: https://doi.org/10.1515/msp-2016-0013

Keywords
compressive strength, bioactivity, TaO, glass-ceramics

©2016 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

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Fig. 5

Fig. 6

Fig. 7

Fig. 8

Glass transition temperature Tg and crystallization temperature Tc.

Influence of Ta2O5 doping on mechanical and biological properties of silicate glass-ceramics

Article Category: Research Article

Published Online: Apr 27, 2016

Page range: 13 - 18

Received: Jan 17, 2015

Accepted: Nov 23, 2015

DOI: https://doi.org/10.1515/msp-2016-0013

Keywordscompressive strength, bioactivity, TaO, glass-ceramics

©2016 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Glass transition temperature Tg and crystallization temperature Tc.

Influence of Ta₂O₅ doping on mechanical and biological properties of silicate glass-ceramics

Keywords
compressive strength, bioactivity, TaO, glass-ceramics