CuO对堇青石微晶玻璃析晶行为及微波介电性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (10): 3843-3851.

CuO对堇青石微晶玻璃析晶行为及微波介电性能的影响

张杰¹, 陈巧², 刘佳², 李路瑶¹, 王静¹, 韩建军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:张杰(1997—),男,硕士研究生。主要从事微晶玻璃材料的研究。E-mail:jie9zxn@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)

Effect of CuO on Crystallization Behavior and Microwave Dielectric Properties of Cordierite Glass-Ceramics

ZHANG Jie¹, CHEN Qiao², LIU Jia², LI Luyao¹, WANG Jing¹, HAN Jianjun¹

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-析晶法制备了xCuO-(22.2-x)MgO-22.2Al₂O₃-55.6SiO₂(x=0、0.25、0.50、0.75、1.00,摩尔分数)(MAS)微晶玻璃,研究了CuO含量对MAS微晶玻璃析晶行为、晶相种类、微观形貌和微波介电等性能的影响。结果表明,随着CuO对MgO的取代量从0%增加到1.00%,玻璃化转变温度降低,析晶峰温度也表现出降低的趋势,Avrami指数n逐渐增加。微晶玻璃的主晶相为α-堇青石,CuO的加入促进了μ-堇青石在更低温度完成向α-堇青石的转变且有利于热膨胀系数的降低。随着CuO含量增大,微晶玻璃介电常数先增加后减小,介电损耗则是先减小后增加。在650 ℃/2 h+1 050 ℃/2 h下,CuO含量为0.25%和0.50%的微晶玻璃介电性能综合较优,在14.6~15.2 GHz频率下,介电常数分别为5.05和5.07,介电损耗分别为7.49×10^-4和7.12×10^-4,品质因数分别为20 013.35和20 786.41 GHz。

关键词: 堇青石微晶玻璃, CuO, 烧结-析晶法, 微波介电性能, 析晶动力学

Abstract: The xCuO-(22.2-x)MgO-22.2Al₂O₃-55.6SiO₂ (x=0, 0.25, 0.50, 0.75 and 1.00, molar fraction) (MAS) glass-ceramics were synthesized using sintering-crystallization method. The effect of CuO content on the crystallization behavior, crystal type, micromorphology and microwave dielectric properties of MAS glass-ceramics was studied. The results show that as the CuO content increases from 0% to 1.00%, substituting for MgO, the glass transition temperature decreases. Additionally, the precipitation peak temperatures also show a decreasing trend, while the Avrami index n gradually increases. The primary crystalline phase in glass-ceramics is α-cordierite. The inclusion of CuO facilitates the transformation of μ-cordierite to α-cordierite at lower temperatures and reduces the thermal expansion coefficient. With the increase of CuO content, the dielectric constant of glass-ceramics increases first and then decreases, while the dielectric loss decreases first and then increases. At a heat treatment 650 ℃/2 h+1 050 ℃/2 h, the glass-ceramics doped with 0.25% and 0.50% CuO exhibits optimal integrated dielectric properties, which dielectric constant is 5.04 and 5.07, dielectric loss is 7.49×10^-4 and 7.12×10^-4, and quality factor is 20 013.35 and 20 786.41 GHz within the frequency range of 14.6~15.2 GHz.

Key words: cordierite glass-ceramics, CuO, sintering-crystallization method, microwave dielectric property, crystallization kinetic

中图分类号:

TQ171

张杰, 陈巧, 刘佳, 李路瑶, 王静, 韩建军. CuO对堇青石微晶玻璃析晶行为及微波介电性能的影响[J]. 硅酸盐通报, 2024, 43(10): 3843-3851.

ZHANG Jie, CHEN Qiao, LIU Jia, LI Luyao, WANG Jing, HAN Jianjun. Effect of CuO on Crystallization Behavior and Microwave Dielectric Properties of Cordierite Glass-Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(10): 3843-3851.

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