ZnO对尖晶石微晶玻璃的析晶和性能影响

摘要/Abstract

摘要： 尖晶石微晶玻璃不仅具有良好的透过性能,而且具有优异的机械性能,在盖板玻璃、航空航天、军事、牙科和光学器件领域有着重要的应用。本文研究了ZnO含量对MgO-Al₂O₃-SiO₂(MAS)玻璃析晶和性能的影响。结果表明,随着ZnO含量的增加,玻璃化转变温度逐渐下降,析晶峰温度也向低温区移动,而且析晶峰逐渐增强,说明ZnO的加入能够促进析晶。通过拉曼光谱对玻璃的结构进行分析,发现随着ZnO含量增加,玻璃网络中的Q³、Q³(Zr)以及Q⁴单元逐渐减少,Q²单元逐渐增多,说明玻璃网络结构变得疏松,有利于晶体生长。ZnO的加入提高了热处理后样品的硬度,在920 ℃热处理2 h时ZnO含量为7.5%(摩尔分数)的样品硬度达到最大值,为8.13 GPa。同时,ZnO的加入还改善了高温热处理样品的透过率,样品在可见光范围内的平均透过率大于80%,具有良好的透光性。

关键词: 微晶玻璃, ZnO, 尖晶石, 析晶, 透光性, 硬度

Abstract: Spinel glass-ceramics exhibit excellent mechanical properties and high permeability, making it highly suitable for various applications such as cover glass, aerospace, military, dental and optical devices. The effect of ZnO content on the crystallization behavior and properties of MgO-Al₂O₃-SiO₂ (MAS) glass was investigated. The results show that the increase of ZnO content leads to a gradual decrease in the glass transition temperature. Additionally, the crystallization peak temperature shifts to lower temperatures, accompanied by an increase in the crystallization peak magnitude, which indicates that the addition of ZnO promotes crystallization. The structure of glasses was analyzed by Raman spectroscopy. With the increase of ZnO content, the Q³, Q³(Zr) and Q⁴units in the glass network gradually decrease, and the Q² units gradually increase, indicating that the structure of glass network become loose and conducive to the growth of crystals. The addition of ZnO improves the hardness of sample after heat treatment, and the maximum hardness of sample with 7.5% (mole fraction) ZnO content at 920 ℃ for 2 h is 8.13 GPa. Moreover, the addition of ZnO enhances the transmittance of high-temperature heat-treated samples. The average transmittance of samples is greater than 80% in the visible light range, which has excellent optical transparency.

Key words: glass-ceramics, ZnO, spinel, crystallization, transparency, hardness

中图分类号:

TQ171

陈考翔, 王明忠, 饶宇, 崔佳琳, 陶海征, 陆平. ZnO对尖晶石微晶玻璃的析晶和性能影响[J]. 硅酸盐通报, 2024, 43(9): 3446-3454.

CHEN Kaoxiang, WANG Mingzhong, RAO Yu, CUI Jialin, TAO Haizheng, LU Ping. Effect of ZnO on Crystallization and Properties of Spinel Glass-Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(9): 3446-3454.

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