Analytical and HREM study of the early stages of SiO2-Al2O3-(Mg, Zn)O glass crystallisation

Dutkiewicz J.; Stoch L.; Morgiel J.Kostorz G.Stoch P.

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Analytical and HREM study of the early stages of SiO2-Al2O3-(Mg, Zn)O glass crystallisation

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The transformation from the amorphous into the crystalline structure at temperatures close to temperature of glass transition of 750 degreesC was investigated in a 47SiO(2)-22Al(2)O(3)-17MgO-2ZnO-12TiO(2) glasses with X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution electron microscopy (HREM). The investigations indicated that heat treatment of this glass results in the formation of rod-like crystals of high-temperature quartz structure. At the early stages of crystallisation, the formation of (Mg, Al) titanates was observed. TEM of glasses heat-treated at 725 degreesC showed nucleation and growth of small dendrite-like precipitates enriched in Ti and depleted in Si. High-resolution transmission electron microscopy (HRTEM) has indicated that the crystallisation is occurring through a local ordering of the atoms in the amorphous glass structure, within areas up to 5 nm. Above 900 degreesC an enstatite (Mg, Zn)SiO3 phase is formed. (C) 2003 Elsevier Science B.V. All rights reserved. References: 9

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《Materials Chemistry and Physics》 |2003年第3期|411-413|共3页
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Dutkiewicz J.; Stoch L.; Morgiel J.Kostorz G.Stoch P.;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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正文语种英语
中图分类工程材料学;
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Magnesium aluminosilicate glass; Crystallisation of glass; Crystal nucleation; Microstructure; Electron microscopy; Ceramics;

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Analytical and HREM study of the early stages of SiO2-Al2O3-(Mg, Zn)O glass crystallisation

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