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  • 1 Slovak Technical University Department of Physical Metallurgy, Faculty of Material Science and Technology 831 02 Bratislava Slovakia 831 02 Bratislava Slovakia
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Abstract  

The properties of biologically active glasses in the system SiO2−P2O5−MgO−CaO were studied. Crystalline hydroxyapatite (HA) and β-wollastonite (β-W) were used after heat treatment (1100C). The influence of the glass particle size (0.071–2.5 mm) and of glass powder (d50=15.1 μm) on the behaviour of the products during differential thermal analysis was followed. These analyses indicated that the β-W probably originates from surface nucleation, and HA from bulk nucleation. The differentiation was confirmed by calculation of the Avrami parameters (n) with the Pi-loyan-Borchardt analytical method. For HA and β-W, the calculated values ofn were 2.96 and 1.91. The surface-nucleated glasses exhibited predominant bidimensional crystal growth.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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