Synthesis and characterization of MgSiO3-containing glass-ceramics

• Published in: Ceramics international Vol. 33; no. 8; pp. 1481 - 1487
• Main Authors: GOEL, A, TULYAGANOV, D. U, AGATHOPOULOS, S, RIBEIRO, M. J, FERREIRA, J. M. F
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Science 01-12-2007
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Chemical industry and chemicals; Exact sciences and technology; Glass-ceramics; Glasses; Magnesium Metasilicates; Enstatite; Crystallization; Glass; Differential thermal analysis; Silicates; Experimental study; X ray diffraction; Precursor; Ion substitution; Diopside; Microstructure; Glass ceramics
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2006.05.012

Three glass compositions for the production of Mg-metasilicate (MgSiO3) based glass-ceramics were studied. The composition with 25 mol% diopside and 75 mol% enstatite (Ca0.125Mg0.875SiO3), considered as the starting point, aimed to reduce the tendency of Mg-metasilicate for polymorphism. In the two derivative compositions, substitutions of yttrium and barium for magnesium as well as boron for silicon were attempted. Glasses in both bulk and frit forms were produced by melting in alumina crucibles at 1600 C for 1-2 h. Sintering and crystallisation of glass-powder compacts were carried out at different temperatures in the range 850-1000 C. The influence of these substitutions on the crystallisation of the glasses and the properties of the resultant glass-ceramics was experimentally determined and discussed in the light of the potential of these compositions in advanced technology applications. 22 refs.