不同Al2O3/SiO2比的MgO-Al2O3-SiO2微晶玻璃制备及性能研究

摘要/Abstract

摘要： 本文采用烧结法制备MgO-Al₂O₃-SiO₂(MAS)微晶玻璃,研究不同Al₂O₃/SiO₂质量比对MAS微晶玻璃的微观结构和理化性能的影响,采用X射线衍射、差热分析、红外光谱、扫描电子显微镜对基础玻璃与微晶玻璃的结构和表面形貌进行表征,并对微晶玻璃的密度、力学性能、耐蚀性、热学性能和介电性能进行测试分析。结果表明:随着Al₂O₃/SiO₂质量比从0.52增大至0.64,基础玻璃的玻璃化转变温度T_g增大、析晶峰值温度T_p减小,促使样品析出α-堇青石晶相;样品密度在2.52~2.60 g/cm³波动,介电常数ε_r由1.73增加到4.51,热膨胀系数由4.46×10^-6 ℃^-1降低到2.38×10^-6 ℃^-1,介电损耗tan δ在8.4×10^-3~3.7×10^-3波动,抗弯强度在80~120 MPa波动。

关键词: Al₂O₃/SiO₂, MgO-Al₂O₃-SiO₂, 微晶玻璃, 堇青石, 介电性能

Abstract: MgO-Al₂O₃-SiO₂ (MAS) glass-ceramics were prepared by sintering method. The effects of different Al₂O₃/SiO₂ mass ratios on the microstructure and physicochemical properties of MAS glass-ceramics were studied. The structure and surface morphology of parent glass and glass-ceramics were characterized by XRD, DSC, FTIR and FESEM. The density, mechanical properties, corrosion resistance, thermal properties and dielectric properties of glass-ceramics were tested. The results show that as the mass ratio of Al₂O₃/SiO₂ increases from 0.52 to 0.64, the glass transition temperature T_g of the parent glass increases and the crystallization peak temperature T_p of the parent glass decreases, promoting the precipitation of α-cordierite crystal phase. The density of the samples fluctuates in the range of 2.52~2.60 g/cm³, dielectric constant ε_r increases from 1.73 to 4.51, thermal expansion coefficient decreases from 4.46×10^-6 to 2.38×10^-6 ℃^-1, dielectric loss tan δ fluctuates in the range of 8.4×10^-3~3.7×10^-3, and the flexural strength fluctuates in the range of 80~120 MPa.

Key words: Al₂O₃/SiO₂, MgO-Al₂O₃-SiO₂, glass-ceramics, cordierite, dielectric property

中图分类号:

TQ171

湛玲丽, 贾涵, 张晓峰, 李宏, 谢俊, 熊德华. 不同Al₂O₃/SiO₂比的MgO-Al₂O₃-SiO₂微晶玻璃制备及性能研究[J]. 硅酸盐通报, 2023, 42(12): 4490-4500.

ZHAN Lingli, JIA Han, ZHANG Xiaofeng, LI Hong, XIE Jun, XIONG Dehua. Preparation and Properties of MgO-Al₂O₃-SiO₂ Glass-Ceramics with Different Al₂O₃/SiO₂ Ratios[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4490-4500.

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不同Al₂O₃/SiO₂比的MgO-Al₂O₃-SiO₂微晶玻璃制备及性能研究

Preparation and Properties of MgO-Al₂O₃-SiO₂ Glass-Ceramics with Different Al₂O₃/SiO₂ Ratios

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