高,低玻璃陶在结晶过程中的局部结构变化
Minghan Li1,2, Yan Pan1,3, Shuguang Wei1,3
1State Key Laboratory of Tropic Ocean Engineering Materials and Materials Evaluation & Special Glass Key Laboratory of Hainan Province, Hainan University, Haikou 570228, China.
Nanomaterials (Basel, Switzerland)
|September 26, 2025
概括
这项研究详细介绍了高含量,低含量玻璃陶的结晶,揭示了阴离子迁移和结构变化如何导致形成具有出色机械和光学性能的纳米晶体螺旋体和晶体相.
科学领域:
- 材料科学 材料科学 材料科学
- 结晶科学 结晶科学
- 纳米材料是一种纳米材料.
背景情况:
- 高含量,低含量的玻璃陶是具有可调节性质的先进材料.
- 了解相位过渡和结晶过程对于优化它们的性能至关重要.
- 控制核和晶体生长决定了最终的微观结构和特性.
研究的目的:
- 研究ZnO-MgO-Li2O-SiO2-Al2O3玻璃陶中的相变和结晶机制.
- 阐明离子迁移和结构单元在形成特定晶体相中的作用.
- 为了潜在的应用,将微观结构与机械和光学特性相关联.
主要方法:
- 不同扫描热度计 (DSC) 和高温X射线衍射 (HT-XRD) 用于热分析和相位识别.
- 场辐射传输电子显微镜 (FE-TEM) 用于微观结构观测.
- 拉曼光谱法用于分析结晶过程中的玻璃网络结构变化.
主要成果:
- (Zn,Mg) Al2O4螺旋晶体的核化在850°C左右开始,由Zn和Mg聚合在Al周围驱动.
- Zr聚合导致ZrO2纳米晶体的形成.
- 拉曼光谱显示,在旋转沉过程中,Q3和Q4单位增加,以及桥梁氧.
- 参与旋核化抑制不良的含有酸盐相.
- 由此产生的玻璃陶具有 (Zn,Mg) Al2O4和ZrO2.2.的纳米晶体.
结论:
- 这项研究成功地阐明了高,低玻璃陶中的核和生长机制.
- 控制的离子迁移和Al协调是形成所需纳米晶相的关键.
- 由此产生的玻璃陶具有高硬度 (875 Hv),屈曲强度 (350 MPa) 和透明度 (81.5%).
- 这些特性使该材料适合于要求苛刻的应用,如保护屏幕和透明盔甲.
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