晶核剂对透明堇青石微晶玻璃析晶与性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (4): 1466-1474.

所属专题：玻璃

• 陶瓷、玻璃及耐火材料 • 上一篇下一篇

晶核剂对透明堇青石微晶玻璃析晶与性能的影响

郑伟宏¹, 张航¹, 高子鹏¹, 黄猛¹, 袁坚¹, 田培静¹, 彭志钢²

1.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070;
2.河北省沙河玻璃技术研究院,邢台 054100

收稿日期:2022-12-12 修订日期:2023-01-20 出版日期:2023-04-15 发布日期:2023-04-25
通信作者: 张航,硕士研究生。E-mail:13516201789@163.com
作者简介:郑伟宏(1981—),男,博士,副教授。主要从事电子玻璃/微晶玻璃方面的研究。E-mail:zhengweihong@whut.edu.cn
基金资助:
硅酸盐建筑材料国家重点实验室(武汉理工大学)开放基金(2011DA105356)

Effect of Nucleating Agent on Crystallization and Properties of Transparent Cordierite Glass-Ceramics

ZHENG Weihong¹, ZHANG Hang¹, GAO Zipeng¹, HUANG Meng¹, YUAN Jian¹, TIAN Peijing¹, PENG Zhigang²

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. Shahe Glass Technology Research Institute, Xingtai 054100, China

Received:2022-12-12 Revised:2023-01-20 Online:2023-04-15 Published:2023-04-25

摘要/Abstract

摘要： 采用熔融法制备了含有不同晶核剂的非化学计量比堇青石微晶玻璃,通过DSC、XRD、FE-SEM、UV-VIS-NIR等测试方法研究了不同晶核剂对微晶玻璃析晶与性能的影响,并用经典动力学方程(Johnson-Mehl-Avrami)分析了微晶玻璃的析晶动力学。结果表明,以P₂O₅和P₂O₅+ZrO₂为晶核剂的微晶玻璃晶化机制均为表面晶化,而以P₂O₅+ZrO₂+TiO₂为晶核剂的微晶玻璃则倾向于整体析晶。三组微晶玻璃在950 ℃晶化时主晶相为μ-cordierite,当温度升高到980 ℃时开始转变为α-cordierite,引入TiO₂使α-cordierite的含量增加,析出的晶体更加复杂致密。随着晶化时间延长,与其他晶核剂相比,P₂O₅+ZrO₂+TiO₂组合晶核剂微晶玻璃在相同晶化时间内结晶度更高,α-cordierite含量的增加显著提升了微晶玻璃的力学性能,但降低了透过率。在800 ℃/10 h+980 ℃/3 h热处理制度下,以P₂O₅+ZrO₂+TiO₂为晶核剂的微晶玻璃弹性模量可达103 GPa,断裂韧性为1.27 MPa·m^1/2,透过率为82.3%,可满足用作移动终端领域的性能要求。

关键词: MgO-Al₂O₃-SiO₂, 堇青石, 晶核剂, 透明微晶玻璃, 弹性模量, 析晶动力学

Abstract: Cordierite silicon glass-ceramics with different nucleating agents were prepared by melting. The effects of different nucleating agents on the crystallization and properties of glass-ceramics were studied by DSC, XRD, FE-SEM, UV-VIS-NIR and other test methods, and the crystallization kinetics of glass-ceramics with different nucleating agents were analyzed using the classical kinetic equation (Johnson-Mehl-Avrami). The results indicate that the crystallization mechanism of glass-ceramics with P₂O₅ or P₂O₅+ZrO₂ as nucleating agent is controlled by surface crystallization. However, the glass-ceramics with P₂O₅+ZrO₂+TiO₂ as nucleating agent has the tendency to be bulk crystallization. With the crystallization temperature increases from 950 ℃ to 980 ℃, the μ-cordierite in the three groups of glass-ceramics begins to transform into α-cordierite. While the introduction of TiO₂ increases the α-cordierite content, the precipitated crystals become dense. With the extension of crystallization time, compared with other nucleating agent, the glass-ceramics with P₂O₅+ZrO₂+TiO₂ as nucleating agent obtain higher crystallinity within the same crystallization time, the increase of α-cordierite content significantly improves the mechanical properties of glass-ceramics, but decreases the light transmittance. Under the heat treatment system of 800 ℃/10 h+980 ℃/3 h, the elastic modulus of glass-ceramics with P₂O₅+ZrO₂+TiO₂ as nucleating agent reaches 103 GPa, the fracture toughness is 1.27 MPa·m^1/2 and the light transmittance is 82.3%, which meet the performance requirements of mobile terminals.

Key words: MgO-Al₂O₃-SiO₂, cordierite, nucleating agent, transparent glass-ceramics, elastic modulus, crystallization kinetics

中图分类号:

TQ171

郑伟宏, 张航, 高子鹏, 黄猛, 袁坚, 田培静, 彭志钢. 晶核剂对透明堇青石微晶玻璃析晶与性能的影响[J]. 硅酸盐通报, 2023, 42(4): 1466-1474.

ZHENG Weihong, ZHANG Hang, GAO Zipeng, HUANG Meng, YUAN Jian, TIAN Peijing, PENG Zhigang. Effect of Nucleating Agent on Crystallization and Properties of Transparent Cordierite Glass-Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(4): 1466-1474.

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晶核剂对透明堇青石微晶玻璃析晶与性能的影响

Effect of Nucleating Agent on Crystallization and Properties of Transparent Cordierite Glass-Ceramics

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