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In situ observation of Li2O-Al2O3-SiO2 glass crystallization process and kinetics analysis
Li, HD; Yang, LP; Cao, CC; Tao, Y; Zhong, Q; Xu, ZJ; Luo, CY; Wang, WB
2020-10-01
Source PublicationJOURNAL OF CRYSTAL GROWTH
ISSN0022-0248
SubtypeArticle
AbstractIn this work, we have observed the crystallization process of Li2O-Al2O3-SiO2 glass using a high-temperature confocal laser scanning microscope and studied its crystallization kinetics with differential thermal analysis. The value of activation energy has been calculated out using Kissinger and Flynn-Wall-Ozawa methods. The results show that LiAlSi3O8 crystal particles precipitate at 850 degrees C, and then gradually grow to 75 um with the irregular hexagonal structure until 980 degrees C. The activation energy of two exothermal peaks through Kissinger method is 121.78 +/- 13.42 and 189.74 +/- 7.76 kJ/mol. Glass transition and crystallization both have remarkable kinetics effects, and kinetic crystallization parameter, Avrami index (n), indicates that crystallization mechanism of two exothermal peaks corresponds to one-dimensional and surface crystallization, respectively.
DOI10.1016/j.jcrysgro.2020.125816
WOS KeywordCERAMICS ; MICROSTRUCTURE ; PYROLYSIS
Language英语
WOS Research AreaCrystallography ; Materials Science ; Physics
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27719
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Li, HD,Yang, LP,Cao, CC,et al. In situ observation of Li2O-Al2O3-SiO2 glass crystallization process and kinetics analysis[J]. JOURNAL OF CRYSTAL GROWTH,2020.
APA Li, HD.,Yang, LP.,Cao, CC.,Tao, Y.,Zhong, Q.,...&Wang, WB.(2020).In situ observation of Li2O-Al2O3-SiO2 glass crystallization process and kinetics analysis.JOURNAL OF CRYSTAL GROWTH.
MLA Li, HD,et al."In situ observation of Li2O-Al2O3-SiO2 glass crystallization process and kinetics analysis".JOURNAL OF CRYSTAL GROWTH (2020).
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