How to cite this article: Dittmer M, Rü ssel C. 2012. Colorless and high strength MgO/Al2O3/SiO2 glass-ceramic dental material using zirconia as nucleating agent. J Biomed Mater Res Part B 2012:100B:463–470.
Colorless and high strength MgO/Al2O3/SiO2 glass–ceramic dental material using zirconia as nucleating agent†
Article first published online: 21 NOV 2011
Copyright © 2011 Wiley Periodicals, Inc.
Journal of Biomedical Materials Research Part B: Applied Biomaterials
Volume 100B, Issue 2, pages 463–470, February 2012
How to Cite
Dittmer, M. and Rüssel, C. (2012), Colorless and high strength MgO/Al2O3/SiO2 glass–ceramic dental material using zirconia as nucleating agent. J. Biomed. Mater. Res., 100B: 463–470. doi: 10.1002/jbm.b.31972
- Issue published online: 4 JAN 2012
- Article first published online: 21 NOV 2011
- Manuscript Accepted: 28 AUG 2011
- Manuscript Revised: 22 AUG 2011
- Manuscript Received: 29 APR 2011
- dental materials;
- high strength;
- fracture toughness;
Glasses in the system of MgO/Al2O3/SiO2 with different concentrations of zirconia as nucleating agent, some of them additionally doped with ZnO or P2O5, were annealed in a temperature range from 950 to 1150°C. The use of zirconia led to colorless glass–ceramics, which were transparent to opaque. In all studied compositions, α-/β-quartz-solid-solutions, zirconia as well as spinel or gahnite (ZnAl2O4)/spinel-solid-solution precipitated. The highest bending strength of 475 MPa was obtained after annealing at 1000°C for 3 h. The increase of the annealing temperature or an increase in the zirconia concentration resulted in an increase of the microhardness up to 13.3 GPa and of the fracture toughness up to 2.7 MPa m1/2. The addition of ZnO results in an increase of the hardness up to 12.5 GPa. The addition of ZnO or P2O5 led to a fracture toughness of 2 MPa m1/2. The described physical properties had to be highly advantageous for the preparation of colorless high strength dental glass–ceramics. © 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 100B: 463–470, 2012.