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Synthesis and Characterization of Synthetic F-Mica Containing Glass-Ceramics in the System SiO2·Al2O3·B2O3·CaO·MgO·Li2O·(K,Na)2O·F

Published online by Cambridge University Press:  03 March 2011

D.U. Tulyaganov ,
S. Agathopoulos ,
H.R. Fernandes  and
J.M.F. Ferreira
D.U. Tulyaganov
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro,Aveiro 3810-193, Portugal
S. Agathopoulos
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro,Aveiro 3810-193, Portugal
H.R. Fernandes
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro,Aveiro 3810-193, Portugal
J.M.F. Ferreira*
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro,Aveiro 3810-193, Portugal
*
a)Address all correspondence to this author. e-mail: jmf@cv.ua.pt
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Abstract

Ions of Li, Na, K, and B were incorporated in Ca-mica, CaMg3Al2Si2O10F2. The crystallization process and the properties of the resulting glass-ceramics were experimentally determined, and the role of the anions and cations is discussed. According to the results, Li, K, and Na ions strongly affected the formation of the crystalline phases. Until 900 °C, pargasite and F-cannilloite amphiboles and KLi-mica were predominately crystallized. The two amphiboles are dissociated, yielding stable forsterite at 900 °C and Ca-mica and spinel at 950 °C. KLi-mica showed remarkable stability and growth within the investigated temperature range, until 1000 °C. The optimum crystallization temperature for the investigated glass-ceramics is between800 °C and 900 °C. The produced glass-ceramics exhibited capability for easy bulk crystallization, high whiteness, translucency, and mechanical and chemical properties suitable for several applications.

Keywords

AmphibolesGlass-ceramicsCrystallization
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 4 , April 2004 , pp. 1234 - 1242
Copyright
Copyright © Materials Research Society 2004

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