Results of adequately heat-treated Li2O-ZrO2-SiO 2 (LZS) glass-ceramic that consider the identification and quantification of crystalline and glassy-formed phases and their concentration profiles using the Chung method were presented. The batch produced 100 g of glass was placed into a platinum crucible and melted at 1450°C for 7 h in an electrically heated furnace and quenched onto a steel mold. X-ray diffraction (XRD) patterns show ZrSiO2 formation at 850°C, while at 900°C, the intensity of the compound increases and Li2O-2SiO 2 appears. The peak intensities registered at 950°C show an increased volume fraction occupied by the crystals. The compositions of LiSi2O5 and ZrSiO4 and total glass-ceramic crystalline phase are the function of the applied heat-treatment temperature.
Quantitative analysis of crystalline phases in a LZS glass-ceramic / De Oliveira, A. P. N.; Manfredini, T.. - In: AMERICAN CERAMIC SOCIETY BULLETIN. - ISSN 0002-7812. - 88:2(2009), pp. 28-31.
Quantitative analysis of crystalline phases in a LZS glass-ceramic
Manfredini T.
2009
Abstract
Results of adequately heat-treated Li2O-ZrO2-SiO 2 (LZS) glass-ceramic that consider the identification and quantification of crystalline and glassy-formed phases and their concentration profiles using the Chung method were presented. The batch produced 100 g of glass was placed into a platinum crucible and melted at 1450°C for 7 h in an electrically heated furnace and quenched onto a steel mold. X-ray diffraction (XRD) patterns show ZrSiO2 formation at 850°C, while at 900°C, the intensity of the compound increases and Li2O-2SiO 2 appears. The peak intensities registered at 950°C show an increased volume fraction occupied by the crystals. The compositions of LiSi2O5 and ZrSiO4 and total glass-ceramic crystalline phase are the function of the applied heat-treatment temperature.Pubblicazioni consigliate
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