Feng Xu, Gao Guanfeng, Lin Quanhua, Yang Yongkang, Tan Jiajia, Liu Ziang, Qiu Jianrong, Jiang Xiaofang, Zhou Shifeng
State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
Key Laboratory of Atomic and Subatomic Structure and Quantum Control (Ministry of Education), Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, School of Physics, South China Normal University, Guangzhou, 510006, China.
Adv Sci (Weinh). 2025 Feb;12(6):e2411861. doi: 10.1002/advs.202411861. Epub 2024 Dec 16.
The entropy mediated temperature-structure evolution has attracted significant interest, which is used for the development of functional alloys and ceramics. But such strategy has not yet been demonstrated for development of non-metallic glasses. Herein, the successful application of the entropy engineering concept to non-metallic glass to manipulate its in situ crystallization process is demonstrated. The comparison of the entropy concept in alloys, ceramics, and non-metallic glass is discussed. As a typical example, the activation and preservation of the entropy stabilized effect of a typical niobosilicate glass system at different temperatures are studied. The relation between the micro-configurations and the entropic property is analyzed. Via the entropy engineering strategy, the crystallization of the niobosilicate glass can be manipulated. As a result, the LiNbO nanocrystal-in-glass (NiG) composite with high crystallinity is developed, which exhibits 8 times higher nonlinearity compared with the β-BBO crystal. The developed NiG composite is demonstrated for practical application in precise measurement of the duration and phase of ultra-short femtosecond pulse.
熵介导的温度-结构演变已引起了广泛关注，其被用于功能合金和陶瓷的开发。但这种策略尚未在非金属玻璃的开发中得到验证。在此，展示了熵工程概念在非金属玻璃中的成功应用，以操控其原位结晶过程。讨论了合金、陶瓷和非金属玻璃中熵概念的比较。作为一个典型例子，研究了典型铌硅酸盐玻璃系统在不同温度下熵稳定效应的激活和保持。分析了微观构型与熵性质之间的关系。通过熵工程策略，可以操控铌硅酸盐玻璃的结晶。结果，开发出了具有高结晶度的玻璃中LiNbO纳米晶体（NiG）复合材料，其非线性比β-BBO晶体高8倍。所开发的NiG复合材料在超短飞秒脉冲持续时间和相位的精确测量中得到了实际应用验证。
