The preparation of transparent Cristobalite glass ceramics by substituting Li2O with MgO

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids Pub Date : 2025-01-31 DOI:10.1016/j.jnoncrysol.2025.123423

Mengyong Li , Guoliang Xu , Jinfeng Liu , Junwei Dong , Fu Wang , Hanzhen Zhu , Qilong Liao , Laibao Liu

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Abstract

This study investigates the impact of substituting MgO for Li₂O in LAS glass ceramics, and successfully producing transparent glass ceramics with a Cristobalite phase. The visible light transmittance at 550 nm is measured at 88.3 %, while the Vickers hardness is recorded at 7.14 GPa. Substituting MgO for Li₂O strengthens the glass network, which complicates the process of crystallization. The crystallization mode shifts from bulk to surface crystallization. The substantial thermal expansion mismatch between Cristobalite and the glass matrix results in cracking, thereby limiting the crystallinity of Cristobalite glass ceramics. Furthermore, regarding the samples with surface crystallization, phase separation occurs in the uncrystallized regions. FT-IR analysis indicates that heat treatment promotes a trend toward ordering in the material. The relatively regular interface of surface crystallization led to some crystals exhibiting a directional arrangement. This is the most orderly crystal arrangement observed in the reviewed glass ceramics.

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用MgO取代Li2O制备透明方石钡石玻璃陶瓷

本研究探讨了用MgO取代Li2O对LAS玻璃陶瓷的影响，并成功制备了具有方石石相的透明玻璃陶瓷。在550 nm处的可见光透过率为88.3%，维氏硬度为7.14 GPa。用MgO代替Li2O强化了玻璃网络，使结晶过程复杂化。结晶方式由块状结晶转变为表面结晶。方石英与玻璃基体的热膨胀不匹配导致方石英开裂，从而限制了方石英玻璃陶瓷的结晶度。此外，对于表面结晶的样品，在未结晶区域发生相分离。FT-IR分析表明，热处理促进了材料的有序趋势。相对规则的表面结晶界面导致一些晶体呈现出定向排列。这是所观察到的玻璃陶瓷中最有序的晶体排列。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Non-crystalline Solids 工程技术-材料科学：硅酸盐

CiteScore

6.50

自引率

11.40%

发文量

576

审稿时长

35 days

期刊介绍： The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.