The structure and physical properties of peraluminous Li2O-Al2O3-SiO2 transparent glass-ceramics free of nucleating agents

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of Non-crystalline Solids Pub Date : 2025-04-01 Epub Date: 2025-02-10 DOI:10.1016/j.jnoncrysol.2025.123427

Panfeng Wang, Ziqiong Zhang, Guo Yang, Meng Sun, Xiaomei Li, Zhenlin Wang

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Abstract

Peraluminous Li₂O-Al₂O₃-SiO₂ (LAS) glasses with elevated ration of alumina up to 18 Mol% were synthesized by melt-quenching and the corresponding colorless transparent glass-ceramics free of nucleating agents were prepared through two-step heat-treatment. Increasing Al₂O₃ substitution for CaO, MgO, ZnO elevates the glass transition temperature and crystallization temperature as well as stability of glass due to enhanced Si(Al)-O network. The crystallinity and Al/Si ratio of nanoscale LAS crystallites precipitated from the glass matrix increase with Al₂O₃ ration. Phase separation of Si rich and Si(Al)-Li rich percolation regions induced by the abundant and mobile Li⁺ is proposed to interpret the crystallization mechanism. The visible light transmittance of glass and glass-ceramics decrease with Al₂O₃ ration and exceed 85 % for Al₂O₃ below 14 Mol%. Hardness and wear resistance of the glass-ceramics are evidently superior to those of the corresponding precursor glasses and increase with Al₂O₃ content.

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无成核剂的过铝Li2O-Al2O3-SiO2透明微晶玻璃的结构和物理性能

采用熔融淬火法制备了氧化铝含量高达18 Mol%的过铝Li2O-Al2O3-SiO2玻璃，并通过两步热处理制备了相应的无色透明无成核微晶玻璃。增加Al2O3对CaO、MgO、ZnO的取代，由于Si(Al)-O网络增强，玻璃化转变温度和结晶温度升高，玻璃的稳定性提高。从玻璃基体中析出的纳米级LAS晶的结晶度和Al/Si比随Al2O3含量的增加而增加。提出了富Si和富Si(Al)-Li渗流区由丰富的Li+和流动的Li+诱导的相分离来解释结晶机理。玻璃和微晶玻璃的可见光透过率随Al2O3含量的增加而降低，当Al2O3含量低于14 Mol%时可见光透过率超过85%。微晶玻璃的硬度和耐磨性明显优于相应的前驱体玻璃，并随Al2O3含量的增加而增加。

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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.