若干硫系玻璃黏度变化速率的结构起源探索

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (5): 1692-1697.

所属专题：玻璃

若干硫系玻璃黏度变化速率的结构起源探索

周鹏¹, 赵华¹, 祖成奎¹, 陶海征², 刘永华¹, 张瑞¹, 陈玮¹

1.中国建筑材料科学研究总院有限公司,玻璃科学研究院,北京 100024;
2.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:2020-12-10 修回日期:2021-02-26 出版日期:2021-05-15 发布日期:2021-06-07
作者简介:周鹏(1990—),男,工程师。主要从事红外玻璃的研究。E-mail:695943489@qq.com

Structural Origin of Change Rate in Viscosity for Several Chalcogenide Glasses

ZHOU Peng¹, ZHAO Hua¹, ZU Chengkui¹, TAO Haizheng², LIU Yonghua¹, ZHANG Rui¹, CHEN Wei¹

1. Institute of Glass Science, China Building Materials Academy, Beijing 100024, China;
2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2020-12-10 Revised:2021-02-26 Online:2021-05-15 Published:2021-06-07

摘要/Abstract

摘要： 用熔融淬冷法制备Ge₃₃As₁₂Se₅₅、Ge₂₂As₂₀Se₅₈、Ge₁₀As₄₀Se₅₀、As₄₀Se₆₀、Se硫系玻璃,采用流变仪测试样品黏弹状态的黏度,计算各样品黏度的Vogel-Fulcher-Tammann 方程和黏度变化速率(即料性)。结合拉曼光谱,根据玻璃微观结构对料性的影响规律进行系统分析。发现随着Ge_xAs_ySe_100-x-y硫系玻璃中Ge、As含量的增加,玻璃黏度随温度的变化速率先降低再升高,料性先变长后变短。在平均配位数<r>=2~2.6时,随着平均配位数的增大,组成玻璃的原子之间的平均键能和网络结构稳定性逐渐变大,黏度变化速率降低,料性变长;在<r>=2.6~2.78时,随着网络结构中As-As/Ge-Ge缺陷键的出现,玻璃网络结构的稳定性降低,玻璃黏度的变化速率加快,料性变短。

关键词: 硫系玻璃, 结构, 黏度, 黏度变化速率

Abstract: Ge₃₃As₁₂Se₅₅, Ge₂₂As₂₀Se₅₈, Ge₁₀As₄₀Se₅₀, As₄₀Se₆₀, and Se chalcogenide glasses were prepared by the melt-quenching technique. The viscosities of these chalcogenide glasses were measured by a rheometer. Based on these data, the corresponding Vogel-Fulcher-Tammann equationsand change rate in viscosity were obtained. Based on the Raman spectra, the structural characteristics of these glasses were analyzed systematically. With the increase of Ge and As content in Ge_xAs_ySe_100-x-y chalcogenide glasses, the change rate in viscosity upon temperature decreases first and then increases. When the average coordination number <r> is 2 to 2.6, with the increase of the average coordination number, the average chemical bonding energy and network structure stability of the glass gradually increase, and the change rate in viscosity upon temperature decreases. When <r> is 2.6 to 2.78, with the appearance of As-As/Ge-Ge chemical bonds in the structure, the stability of the glass network is deteriorated, and the glass viscosity changes faster upon temperature. The change rate of glass viscosity is consistent with the structural constraint theory, and the change rate of glass viscosity reaches its minimum value at <r>=2.6.

Key words: chalcogenide glass, structure, viscosity, change rate in viscosity

中图分类号:

TQ171

周鹏, 赵华, 祖成奎, 陶海征, 刘永华, 张瑞, 陈玮. 若干硫系玻璃黏度变化速率的结构起源探索[J]. 硅酸盐通报, 2021, 40(5): 1692-1697.

ZHOU Peng, ZHAO Hua, ZU Chengkui, TAO Haizheng, LIU Yonghua, ZHANG Rui, CHEN Wei. Structural Origin of Change Rate in Viscosity for Several Chalcogenide Glasses[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1692-1697.

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若干硫系玻璃黏度变化速率的结构起源探索

Structural Origin of Change Rate in Viscosity for Several Chalcogenide Glasses

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