低膨胀锂铝硅微晶玻璃烧结-析晶行为与性能研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (10): 3834-3842.

低膨胀锂铝硅微晶玻璃烧结-析晶行为与性能研究

陈丹丹¹, 吕大娟², 陈巧², 刘佳², 韩建军¹, 王静¹, 李路瑶¹

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.光纤光缆先进制造与应用技术全国重点实验室,武汉 430070

收稿日期:2024-03-20 修订日期:2024-05-07 出版日期:2024-10-15 发布日期:2024-10-16
通信作者: 王静,博士,研究员。E-mail:wangj@whut.edu.cn
作者简介:陈丹丹(1997—),女,硕士研究生。主要从事微晶玻璃的研究。E-mail:chendandan0812@163.com
基金资助:
光纤光缆先进制造与应用技术全国重点实验室(长飞公司)开放课题(SKLD2207)

Sintering-Crystallization Behavior and Properties of Low Expansion Lithium Aluminosiliate Glass-Ceramics

CHEN Dandan¹, LYU Dajuan², CHEN Qiao², LIU Jia², HAN Jianjun¹, WANG Jing¹, LI Luyao¹

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Wuhan 430070, China

Received:2024-03-20 Revised:2024-05-07 Published:2024-10-15 Online:2024-10-16

摘要/Abstract

摘要： 本文采用烧结法制备了低膨胀Li₂O-Al₂O₃-SiO₂(LAS)微晶玻璃,研究了ZnO部分取代Li₂O对LAS微晶玻璃显微结构、烧结行为、析晶行为和性能的影响。结果表明,ZnO取代Li₂O降低了LAS微晶玻璃起始析晶温度,LAS微晶玻璃在800 ℃保温10 min时便有大量Li₂Al₂Si₃O₁₀晶相析出,阻碍了玻璃的烧结收缩,而不含ZnO的LAS微晶玻璃在800 ℃析晶缓慢,有利于烧结致密化。当烧结温度为1 100 ℃时,微晶玻璃的主晶相均为β-锂辉石,其中不含ZnO的LAS微晶玻璃热膨胀系数为1.747×10^-6 K^-1,抗弯强度为138.4 MPa,介电常数为3.52,介电损耗为0.001 6。

关键词: 微晶玻璃, β-锂辉石, Li₂O-Al₂O₃-SiO₂, 低膨胀, 烧结

Abstract: Low expansion Li₂O-Al₂O₃-SiO₂ (LAS) glass-ceramics were prepared using sintering method. The effect of ZnO partially substitution for Li₂O on the microstructure, sintering behavior, crystallization behavior and properties of LAS glass-ceramics was investigated. The results show that the substitution of ZnO for Li₂O reduces the initial crystallization temperature of LAS glass-ceramics,leading to significant amount of Li₂Al₂Si₃O₁₀ phase precipitating out after holding at 800 ℃ for 10 min, which hinders the sintering shrinkage of glass. In contrast, the LAS glass-ceramics without ZnO exhibits slower crystallization at 800 ℃, which is beneficial for sintering densification process. When the sintering temperature is 1 100 ℃, the main crystalline phase present in glass-ceramics is identified as β-spodumene. The coefficient of thermal expansion of glass-ceramics without ZnO is 1.747×10^-6 K^-1, the flexural strength is 138.4 MPa, the dielectric constant is 3.52 and the dielectric loss is 0.001 6.

Key words: glass-ceramics, β-spodumene, Li₂O-Al₂O₃-SiO₂, low expansion, sintering

中图分类号:

TQ171

陈丹丹, 吕大娟, 陈巧, 刘佳, 韩建军, 王静, 李路瑶. 低膨胀锂铝硅微晶玻璃烧结-析晶行为与性能研究[J]. 硅酸盐通报, 2024, 43(10): 3834-3842.

CHEN Dandan, LYU Dajuan, CHEN Qiao, LIU Jia, HAN Jianjun, WANG Jing, LI Luyao. Sintering-Crystallization Behavior and Properties of Low Expansion Lithium Aluminosiliate Glass-Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(10): 3834-3842.

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