Na2O-Al2O3-SiO2-P2O5玻璃的结构和析晶性能研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (1): 295-301.

所属专题：玻璃

Na₂O-Al₂O₃-SiO₂-P₂O₅玻璃的结构和析晶性能研究

王明忠¹, 刘红刚², 钟波¹, 许银生³, 李继忠³, 陆平³

1.咸宁南玻光电玻璃有限公司,咸宁 437100;
2.清远南玻节能新材料有限公司,清远 511508;
3.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070

收稿日期:2021-06-16 修订日期:2021-11-10 出版日期:2022-01-15 发布日期:2022-02-10
通信作者: 陆平,博士,副研究员。E-mail:lupingwh@whut.edu.cn
作者简介:王明忠(1973—),男,高工。主要从事微晶玻璃的研究。E-mail:wangmz@csholding.com
基金资助:
国家自然科学基金(61975156);咸宁南玻光电玻璃有限公司高强度纳米微晶玻璃核心技术开发及产业化(XNGDJS20210820001)

Structure and Crystallization Behavior of Na₂O-Al₂O₃-SiO₂-P₂O₅ Glasses

WANG Mingzhong¹, LIU Honggang², ZHONG Bo¹, XU Yinsheng³, LI Jizhong³, LU Ping³

1. Xianning CSG Photovoltaic Glass Co., Ltd., Xianning 437100, China;
2. Qingyuan CSG Energy Saving New Material Co., Ltd., Qingyuan 511508, China;
3. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2021-06-16 Revised:2021-11-10 Online:2022-01-15 Published:2022-02-10

摘要/Abstract

摘要： 采用熔融-淬冷法制备了不同(Al₂O₃+P₂O₅)含量的碱铝硅酸盐玻璃,通过拉曼光谱、X射线衍射光谱、扫描电镜研究了其结构特征和析晶性能。发现随着(Al₂O₃+P₂O₅)含量减少,玻璃中Na₂O含量增加,玻璃化转变温度从685 ℃降低到622 ℃,当减少至摩尔分数为22%时,出现析晶峰且起始析晶温度降低。拉曼光谱表明Q⁴_P对应的拉曼峰强度变低且逐渐向低波数方向移动,说明Na₂O作为网络修饰体使硅酸盐玻璃结构逐步解聚,玻璃的析晶能力逐渐增强。结果表明:当(Al₂O₃+P₂O₅)摩尔分数为22%时热处理后的样品存在晶型转变,700 ℃热处理时以NaAlSiO₄霞石晶体为主,900 ℃时转变为以Na_6.8Al_6.3Si_9.7O₃₂霞石晶体为主。当(Al₂O₃+P₂O₅)的摩尔分数为21%和20%时,热处理后的样品能稳定析出Na₃PO₄和Na_6.8Al_6.3Si_9.7O₃₂晶体。热处理后的样品析出了耐酸侵蚀性较差的富磷相和Na₃PO₄晶体,导致化学稳定性变差。

关键词: Na₂O-Al₂O₃-SiO₂-P₂O₅玻璃, 微晶玻璃, 铝硅酸盐玻璃, 盖板玻璃, 析晶, 熔融-淬冷法, 霞石

Abstract: Alkali-aluminosilicate glasses with different (Al₂O₃+P₂O₅) concentrations were prepared by the melting-quenching method, and their structural characteristics and crystallization behavior were studied by Raman spectroscopy, X-ray diffraction spectroscopy, and scanning electron microscopy. It is found that as the concentration of (Al₂O₃+P₂O₅) decreases, the concentration of Na₂O increases, resulting in the glass transition temperature decreases from 685 ℃ to 622 ℃. When the (Al₂O₃+P₂O₅) concentration decreases to 22% (mole fraction), a crystallization peak appears and the onset crystallization temperature gradually decreases. The intensity of the Raman vibration band corresponding to Q⁴_P becomes lower and gradually shifts towards low frequency, indicating that the Na₂O as a network modifier gradually depolymerizes the structure of silicate glass and enhances the crystallization ability of the glass. The results show that there is a crystalline transformation after heat treatment when the concentration of (Al₂O₃+P₂O₅) is 22% (mole fraction). The main precipitation crystals are NaAlSiO₄ nepheline at 700 ℃ for 2 h while it transforms to Na_6.8Al_6.3Si_9.7O₃₂ nepheline crystals at 900 ℃ for 2 h. When the concentration of (Al₂O₃+P₂O₅) is 21% and 20% (mole fraction), Na₃PO₄ and Na_6.8Al_6.3Si_9.7O₃₂ crystals are precipitated after heat treatment. After heat treatment, phosphorus-rich phase and Na₃PO₄ crystals with poor acid corrosion resistance are precipitated, resulting in poor chemical stability.

Key words: Na₂O-Al₂O₃-SiO₂-P₂O₅ glass, glass-ceramics, aluminosilicate glass, cover glass, crystallization, melting-quenching method, nepheline

中图分类号:

TQ171

王明忠, 刘红刚, 钟波, 许银生, 李继忠, 陆平. Na₂O-Al₂O₃-SiO₂-P₂O₅玻璃的结构和析晶性能研究[J]. 硅酸盐通报, 2022, 41(1): 295-301.

WANG Mingzhong, LIU Honggang, ZHONG Bo, XU Yinsheng, LI Jizhong, LU Ping. Structure and Crystallization Behavior of Na₂O-Al₂O₃-SiO₂-P₂O₅ Glasses[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(1): 295-301.

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Na₂O-Al₂O₃-SiO₂-P₂O₅玻璃的结构和析晶性能研究

Structure and Crystallization Behavior of Na₂O-Al₂O₃-SiO₂-P₂O₅ Glasses

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