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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Structural analysis and devitrification of glasses based on the CaO-MgO-SiO2 system with B2O3, Na2O, CaF2 and P2O5 additives
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Structural analysis and devitrification of glasses based on the CaO-MgO-SiO2 system with B2O3, Na2O, CaF2 and P2O5 additives

机译：含B2O3，Na2O，CaF2和P2O5添加剂的CaO-MgO-SiO2系统的玻璃结构分析和失透

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摘要

Glasses, whose basic composition was based on the CaO-MgO-SiO2 system and doped with B2O3, P2O5, Na2O, and CaF2, were prepared by melting at 1400 degrees C for 1 h. Raman and infrared (IR) spectroscopy revealed that the main structural units in the glass network were predominantly Q(1) and Q(2) silicate species. The presence of phosphate and borate units in the structure of the glasses was also evident in these spectra. X-ray analysis showed that the investigated glasses devitrified at 750 degrees C and higher temperatures. The crystalline phases of diopside and wollastonite dominated, but weak peaks, assigned to akermanite and fluorapatite, were also registered in the diffracto-grams. The presence of B2O3, Na2O, and CaF2 had a negligible influence on the assemblage of the crystallized phases, but it caused a reduction of crystallization temperature, comparing to similar glasses of the CaO-MgO-SiO2 system. (c) 2005 Elsevier B.V. All rights reserved.
机译：通过在1400摄氏度下熔融1小时，制备基本成分基于CaO-MgO-SiO2系统并掺有B2O3，P2O5，Na2O和CaF2的玻璃。拉曼光谱和红外光谱表明，玻璃网络中的主要结构单元主要是Q（1）和Q（2）硅酸盐。在这些光谱中，玻璃结构中磷酸盐和硼酸盐单元的存在也很明显。 X射线分析表明，所研究的玻璃在750℃和更高温度下失透。透辉石和硅灰石的晶相占主导地位，但衍射图谱中也记录了弱的峰，这些峰分别归为钙钛矿和氟磷灰石。与类似的CaO-MgO-SiO2系统玻璃相比，B2O3，Na2O和CaF2的存在对结晶相的组装影响可忽略不计，但是却导致了结晶温度的降低。 （c）2005 Elsevier B.V.保留所有权利。

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