期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 563, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2021.120701
关键词
Raman spectroscopy; Raman mapping; Glass-ceramics; Phase separation; Chain framework
资金
- National Natural Science Foundation of China [11964025, 11564031]
- Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region, China [NJYT-17-B10]
- Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources of Inner Mongolia Autonomous Region [2016CXYD-KYPT]
- Inner Mongolia Major Basic Research Open Project [0406091701]
- Inner Mongolia University of Science and Technology Innovation Fund [2019YQL06]
- Natural Science Foundation of Inner Mongolia Autonomous Region of China [2018LH02004]
The addition of nucleating agents or nucleating treatments decreases the polymerization degree of the glass network, leading to depolymerization and phase separation at high temperatures. Raman spectroscopy also reveals the transformation of amorphous structures into crystalline structures during the conversion from glass to glass ceramics.
The effect of nucleating agent on the amorphous phase results in the change of structure and properties of glassceramics. Raman spectroscopic is introduced in the progress of transformation from glass to glass-ceramics with different doping Cr2O3 (with 0wt%, 0.2wt%, 0.4wt%, and 0.6wt%). The polymerization degree of the glassnetwork decreases with adding of nucleating agent, or heating treatment of nucleating. The total percentage of content Q2 (the glass-network with n bridged oxygens, n = 0, 1, 2, 3, 4) and Q4 is decreased by 19.55% and depolymerizes into Q1 and Q3 with the occurrence of the glass-network being damaged, which promotes the occurrence of phase separation at high temperature. Raman mapping displays that the surface or shape wall of solid phase particles for heterogeneous nucleating, and Si-O bonds in amorphous structure will transform into a crystalline structure skeleton. The Raman spectroscopy and Raman mapping have important applications in understanding structural transformation from amorphous to crystal.
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