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Kinetic analysis of the crystallization of Y2O3 and La2O3 doped Li2O–Al2O3–SiO2 glass
RSC Advances ( IF 3.9 ) Pub Date : 2024-02-27 , DOI: 10.1039/d3ra07239h
Tao Zheng 1, 2 , Minghan Li 2 , Yanping Ma 1, 2 , Hong Jiang 1, 2
RSC Advances ( IF 3.9 ) Pub Date : 2024-02-27 , DOI: 10.1039/d3ra07239h
Tao Zheng 1, 2 , Minghan Li 2 , Yanping Ma 1, 2 , Hong Jiang 1, 2
Affiliation
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Li2O–Al2O3–SiO2 (LAS) glass ceramics have a low coefficient of thermal expansion, high mechanical strength, and excellent chemical stability. With advancements in glass ceramics, researchers have explored using LAS glass ceramics with transition metal doping and rare earth doping. Most previous studies have studied the impact of rare earth element doping on crystallization primarily in the context of conventional nucleating agents present in glass. In this study, we aimed to investigate the impact of Y2O3 and La2O3 on LAS glasses in the presence of undoped nucleating agents. The crystallization mechanism of La2O3 and Y2O3 doped LAS glass ceramics was studied using differential scanning calorimetry. The crystallization kinetics of the glasses were analyzed using model-free and modeling methods. Moreover, the activation energy of crystallization and the indices of crystallization and growth of glass ceramics were calculated, and the crystalline phase and microstructure of the samples were characterized. All three fractions of the LAS glass showed consistent crystallization under different calculation methods. The glass doped with La2O3 and Y2O3 exhibited two- or three-dimensional growth during crystallization, promoting crystallization in the LAS glass. The Y3La0 sample demonstrated the most favorable crystallization effect. In the presence of an undoped nucleating agent, rare earth elements can enhance glass crystallization; this new idea can be utilized for the development of new materials.
中文翻译：
Y2O3 和 La2O3 掺杂 Li2O-Al2O3-SiO2 玻璃的结晶动力学分析
Li 2 O–Al 2 O 3 –SiO 2 (LAS)玻璃陶瓷具有低热膨胀系数、高机械强度和优异的化学稳定性。随着玻璃陶瓷技术的进步，研究人员探索了使用过渡金属掺杂和稀土掺杂的LAS玻璃陶瓷。先前的大多数研究主要是在玻璃中存在的常规成核剂的背景下研究稀土元素掺杂对结晶的影响。在本研究中，我们旨在研究在未掺杂成核剂存在的情况下 Y 2 O 3和 La 2 O 3对 LAS 玻璃的影响。采用差示扫描量热法研究了La 2 O 3和Y 2 O 3掺杂LAS玻璃陶瓷的晶化机理。使用无模型和建模方法分析了玻璃的结晶动力学。计算了微晶玻璃的结晶活化能、结晶生长指数，并对样品的晶相和显微结构进行了表征。 LAS 玻璃的所有三个部分在不同的计算方法下都显示出一致的结晶。 掺杂La 2 O 3和Y 2 O 3的玻璃在结晶过程中表现出二维或三维生长，促进了LAS玻璃的结晶。 Y 3 La 0样品表现出最有利的结晶效果。在未掺杂成核剂存在下，稀土元素可以增强玻璃结晶；这一新想法可用于新材料的开发。
更新日期：2024-02-28
中文翻译：
Y2O3 和 La2O3 掺杂 Li2O-Al2O3-SiO2 玻璃的结晶动力学分析
Li 2 O–Al 2 O 3 –SiO 2 (LAS)玻璃陶瓷具有低热膨胀系数、高机械强度和优异的化学稳定性。随着玻璃陶瓷技术的进步，研究人员探索了使用过渡金属掺杂和稀土掺杂的LAS玻璃陶瓷。先前的大多数研究主要是在玻璃中存在的常规成核剂的背景下研究稀土元素掺杂对结晶的影响。在本研究中，我们旨在研究在未掺杂成核剂存在的情况下 Y 2 O 3和 La 2 O 3对 LAS 玻璃的影响。采用差示扫描量热法研究了La 2 O 3和Y 2 O 3掺杂LAS玻璃陶瓷的晶化机理。使用无模型和建模方法分析了玻璃的结晶动力学。计算了微晶玻璃的结晶活化能、结晶生长指数，并对样品的晶相和显微结构进行了表征。 LAS 玻璃的所有三个部分在不同的计算方法下都显示出一致的结晶。 掺杂La 2 O 3和Y 2 O 3的玻璃在结晶过程中表现出二维或三维生长，促进了LAS玻璃的结晶。 Y 3 La 0样品表现出最有利的结晶效果。在未掺杂成核剂存在下，稀土元素可以增强玻璃结晶；这一新想法可用于新材料的开发。
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