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FUNCTIONAL AND STRUCTURAL CHARACTERIZATIONS OF FRESNOITE GLASS-CERAMICS ORIENTED WITH UST TECHNIQUE

机译:用UST技术取向Fresnoite玻璃陶瓷的功能和结构特征

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Transparent glass ceramics with highly oriented surface crystalline layers of fresnoite Ba2TiSi2O8 were prepared by heat treatment of precursor glasses in BaO-TiO2-SiO2 system. The orientation along c-axis of fresnoite crystals normal to the glass surface was evaluated by the surface XRD patterns, and it was remarkably enhanced by ultrasonic surface treatment (UST) before the crystallization using fresnoite powder suspension in water. The effect of UST disappeared after heat treatment in the glass transition region, and the mechanism of UST was discussed on the basis of the persistence at elevated temperatures.
机译:通过在BaO-TiO2-SiO2系统中的前体玻璃的热处理制备具有高度取向表面晶体层的透明玻璃陶瓷。通过表面XRD图案评价沿玻璃表面正常到玻璃表面的弗雷镍晶体的沿C轴的取向,通过在水中使用Fresnoite粉末悬浮液结晶前通过超声表面处理(UST)显着提高。在玻璃过渡区域的热处理后UST消失的效果,并且在升高温度下的持续存在下讨论了UST的机制。

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