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M. D. Fonseca
M. D. Fonseca
Department of Metallurgical and Materials Engineering, UFRJ/COPPE-PEMM—Federal University of Rio de Janeiro, Alberto Luiz Coimbra Institute of Graduate Course and Research of Engineering, Av. Horácio Macedo, 2030—CT/UFRJ—Bloco F sala F210—Ilha do Fundão, Caixa Postal 68505, Rio de Janeiro, RJ, 21941-972, Brazil
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F. T. Silva
F. T. Silva
Department of Metallurgical and Materials Engineering, UFRJ/COPPE-PEMM—Federal University of Rio de Janeiro, Alberto Luiz Coimbra Institute of Graduate Course and Research of Engineering, Av. Horácio Macedo, 2030—CT/UFRJ—Bloco F sala F210—Ilha do Fundão, Caixa Postal 68505, Rio de Janeiro, RJ, 21941-972, Brazil
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T. Ogasawara
T. Ogasawara
Department of Metallurgical and Materials Engineering, UFRJ/COPPE-PEMM—Federal University of Rio de Janeiro, Alberto Luiz Coimbra Institute of Graduate Course and Research of Engineering, Av. Horácio Macedo, 2030—CT/UFRJ—Bloco F sala F210—Ilha do Fundão, Caixa Postal 68505, Rio de Janeiro, RJ, 21941-972, Brazil
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Abstract
Feldspathic glass–ceramics reinforced with leucite are usually used in dental prosthesis. This study focused on leucite crystallization kinetics due to its importance to the end product of a dental crown processing. Leucite grains were nucleated and grown from feldspathic glass frit powders with particle size smaller than 45 μm. The nucleation and crystallization kinetics of leucite crystals in the glass matrix was investigated under isothermal and non-isothermal conditions through differential thermal analysis. The samples were also characterized by X-ray diffraction and scanning electron microscopy. The temperature of maximum nucleation rate was determined from the DTA curves of samples heat treated at different temperatures. The activation energy (E) of leucite crystallization was determined by the Kissinger method and the Avrami parameter (n) indicated that surface crystallization is the dominant mechanism in the glass.
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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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