Development of Mica-Based Glass-Ceramic with 4 Mol% of Fluorapatite

Abstract:

SiO₂, Al₂O₃, MgO, MgF₂, SrCO₃, CaCO₃, CaF₂ and P₂O₅ were used to prepare machinable glass-ceramic with 4 mol% of fluorapatite for restorative dental applications. XRD showed that the glass heat treated at 792°C (the first crystallization temperature+20°C) for 6 hours consisted of calcium-mica, fluorapatite, strontium apatite, anorthite, forsterite, fluorite and stishovite crystalline phases. The microstructures of the resultant glass-ceramic, observed by SEM, were found to exhibit plate-like mica crystals and many tabular particles embedded in the mica phases. The particles, determined by EDS, were rich in calcium. The three-point bending strength (158 MPa) closely matched that of nature tooth. Average Vickers hardness of the received glass-ceramic (2.6 GPa) was lower than that of natural tooth.

• Periodical: Advanced Materials Research (Volume 1077)
• Pages: 8-13
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1077.8
• Online since: December 2014
• Authors: Bai Jia, Chaysuwan Duangrudee
• Keywords: Fluorapatite, Glass-Ceramic, Mechanical Property, Mica, Microstructure

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