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Crystallization of some anorthite-diopside glass precursors

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Abstract

Anorthite and diopside have been obtained from complete devitrification of glasses belonging to the quaternary system MgO-CaO-Al2O3-SiO2. Microstructure, the natural trend of the nucleation mechanism and kinetic studies on the crystallization phenomenon have been investigated by means of optical and electron microscopies, thermal and thermomechanical techniques and X-ray powder diffractometry. All the glasses investigated show a complete crystallization starting from a simple surface nucleation process. The activation energy for the crystallization process proved to be higher than that for viscous flow, leading to an important aspect modification in the sample during ceramization. Thermal stability and physical properties of both glass and glass-ceramic materials have been tested, suggesting the possible use of these materials in industrial application.

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Authors and Affiliations

  1. Dipartimento di Chimica, Università di Modena, Via Campi 183, 41100, Modena, Italy

    C. Leonelli, T. Manfredini, M. Paganelli, P. Pozzi & G. C. Pellacani

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  1. C. Leonelli
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  2. T. Manfredini
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  3. M. Paganelli
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  4. P. Pozzi
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  5. G. C. Pellacani
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Leonelli, C., Manfredini, T., Paganelli, M. et al. Crystallization of some anorthite-diopside glass precursors. J Mater Sci 26, 5041–5046 (1991). https://doi.org/10.1007/BF00549889

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  • DOI: https://doi.org/10.1007/BF00549889

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