Li Hangren, Liu Saiyu, Xu Wence, Zhang Yuxuan, Li Xin, Ouyang Shunli, Zhao Guangkai, Liu Fang, Wu Nannan
Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China.
Open Project of State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University, Shanghai 200444, China.
Materials (Basel). 2020 Oct 14;13(20):4555. doi: 10.3390/ma13204555.
The microwave sintering of glass-ceramics, non-thermal microwave effect, and crystal growth mechanism remain important challenges in materials science. In this study, we focus on developing approaches to affect crystal growth in the glass network of glass-ceramics by microwave heating, rather than performing a single study on the crystal structure and type. Raman spectroscopy is used to detect the structure of the glass network. We demonstrated that the non-thermal microwave effect promoted the diffusion of metal ions, which promoted the aggregation and precipitation of metal ions in the glass network to form crystals. The samples produced by microwave heating contain more non-bridging oxygen bonds than conventional sintered samples; therefore, the non-thermal microwave effect has a depolymerization effect on the glass network of the sample. Under the influence of microwave field, many metal ions precipitate, which precipitates many crystal nuclei. In addition, many active metal ions are captured during the crystal nucleus growth, which shortens the sintering process of glass-ceramics.
微晶玻璃的微波烧结、非热微波效应及晶体生长机制仍是材料科学中的重要挑战。在本研究中，我们专注于开发通过微波加热影响微晶玻璃玻璃网络中晶体生长的方法，而非仅对晶体结构和类型进行单一研究。拉曼光谱用于检测玻璃网络的结构。我们证明非热微波效应促进了金属离子的扩散，进而促进了金属离子在玻璃网络中的聚集和沉淀以形成晶体。微波加热制备的样品比传统烧结样品含有更多的非桥氧键；因此，非热微波效应会对样品的玻璃网络产生解聚作用。在微波场的影响下，许多金属离子沉淀，从而析出许多晶核。此外，在晶核生长过程中捕获了许多活性金属离子，这缩短了微晶玻璃的烧结过程。
