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Crystal growth in a multicomponent lithia aluminosilicate glass

机译：多组分锂铝硅酸盐玻璃中的晶体生长

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摘要

An industrially melted glass with complex composition in the Li_2O-Al_2O_3-SiO_2 system was annealed at temperatures in the range from 700 to 1000 ℃. At temperatures up to 825 ℃, a β-quartz solid solution crystallized, while at higher annealing temperatures keatite was formed. Up to an annealing temperature of 850 ℃, the samples were transparent. During annealing at 750 ℃, the concentration of the formed β-quartz crystals increased up to a value of 80wt%, however, the number of crystals remained constant (within the limits of error) for annealing times from 4 to 120 h. Within that period of time, a slight increase in the mean crystallite size (from 16 to 22 nm) was observed, while the lattice parameter (α-axis) decreased. As shown by Rietveld refinement, during annealing, the SiO_2-concentration of the crystals increased continuously, and the β-quartz solid solution was depleted in Li_2O, MgO and Al_2O_3. During crystallization, the viscosity of the glass phase increased which decelerated further crystal growth. Finally, the crystallization was frozen in.
机译：在Li_2O-Al_2O_3-SiO_2系统中组成复杂的工业熔融玻璃在700至1000℃的温度范围内退火。在高达825℃的温度下，β-石英固溶体结晶，而在更高的退火温度下，形成了辉石岩。最高退火温度为850℃，样品是透明的。在750℃的退火过程中，所形成的β-石英晶体的浓度升高到80wt％，但是在4〜120h的退火时间中，晶体数目保持恒定（在误差范围内）。在这段时间内，观察到平均微晶尺寸略有增加（从16 nm到22 nm），而晶格参数（α轴）减小。如Rietveld精炼所示，在退火过程中，晶体的SiO_2浓度连续增加，并且β-石英固溶体中的Li_2O，MgO和Al_2O_3贫化。在结晶过程中，玻璃相的粘度增加，这进一步阻碍了晶体的生长。最后，将结晶冻结。

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  • 来源
    《Materials Chemistry and Physics.》 |2009年第3期|433-437|共5页
  • 作者

    R. Wurth; F. Munoz; M. Mueller; C. Ruessel;

  • 作者单位

    Otto-Schott Institut fuer Glaschemie, Friedrich-Schiller Universitaet Jenae, Fraunhoferstr. 6, 07743 Jena, Germany;

    Institute de Ceramica y Vidrio (CSIC), Kelsen 5,28049 Madrid. Spain;

    Otto-Schott Institut fuer Glaschemie, Friedrich-Schiller Universitaet Jenae, Fraunhoferstr. 6, 07743 Jena, Germany;

    Otto-Schott Institut fuer Glaschemie, Friedrich-Schiller Universitaet Jenae, Fraunhoferstr. 6, 07743 Jena, Germany;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    amorphous materials; crystallization; crystal growth; powder diffraction;

    机译：无定形材料;结晶;晶体生长粉末衍射;

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