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Thermal and structural analysis of 40La(2)O(3)-10Nb(2)O(5)-(50-x)Al2O3-xBaO glasses
Lu, Ping1,2; Zhang, Yixuan1; Li, Jianqiang3
刊名JOURNAL OF NON-CRYSTALLINE SOLIDS
2019-10-15
卷号522页码:8
关键词La2O3-Nb2O5-Al2O3 glass Thermal properties Structure Crystallization kinetics
ISSN号0022-3093
DOI10.1016/j.jnoncrysol.2019.119558
英文摘要Aluminate glasses have excellent optical and mechanical properties, in addition to high thermal and chemical stability. However, aluminate glasses require high melting temperatures and exhibit poor glass forming ability, causing difficulties while preparation by the melt-quench method. Therefore, it is necessary to establish novel methods to improve melting conditions and glass forming tendencies for aluminate glasses. 40La(2)O(3)-10Nb(2)O(5)-(50-x)Al2O3-xBaO (x = 0, 2.5, 5, 7.5, 10) glasses were prepared by the aerodynamic levitation method. XRD, DTA, and Raman and NMR spectroscopic techniques were used to investigate the effects of BaO on the structure and thermal properties-including crystallization behavior-of lanthanum aluminate glass. The results show that the addition of BaO increases the glass transition temperature (T-g) and stability Delta T of the baseline glass, as Al-Ba-7.5 (40Al(2)O(3)-10Nb(2)O(5)-42.5Al(2)O(3)-7.5BaO) glass has the highest AT value (151 degrees C). The 27 Al MAS NMR spectrum of a high BaO-content glass (Al-Ba-10) shows that about 80% of Al-[IV] and 15% of Al-[V] are present in the glass network. Raman scattering spectra indicate that a peak shown around 790 cm(-1) canbe assigned to the internal stretching vibrations of the Al-non-bridging oxygen (NBO) bonds in depolymerized [AlO4/2] tetrahedrons. The crystallization activation energies were calculated to be 1157.1 kJ/mol and 891.7 kJ/mol (Kissinger method) for Al-Ba-x (x = 0, 7.5) glasses, respectively, which progresses as a diffusion-controlled three-dimensional growth process. The nucleation rate of Al-Ba-O decreases continuously, while Al-Ba-7.5 increases.
资助项目National Key Research and Development Program of China[2016YFC0700905] ; National Natural Science Foundation of China[51674232]
WOS关键词CRYSTALLIZATION KINETICS ; ALUMINOSILICATE GLASSES ; ALUMINATE GLASSES ; OPTICAL-PROPERTIES ; HIGH-TEMPERATURE ; AL COORDINATION ; RAMAN ; ER3+/YB3+ ; NMR ; SILICATE
WOS研究方向Materials Science
语种英语
出版者ELSEVIER
WOS记录号WOS:000488998900016
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型期刊论文
源URL[http://ir.ipe.ac.cn/handle/122111/31084]  
专题中国科学院过程工程研究所
通讯作者Li, Jianqiang
作者单位1.Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China
2.Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China
3.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, CAS Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式
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Lu, Ping,Zhang, Yixuan,Li, Jianqiang. Thermal and structural analysis of 40La(2)O(3)-10Nb(2)O(5)-(50-x)Al2O3-xBaO glasses[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2019,522:8.
APA Lu, Ping,Zhang, Yixuan,&Li, Jianqiang.(2019).Thermal and structural analysis of 40La(2)O(3)-10Nb(2)O(5)-(50-x)Al2O3-xBaO glasses.JOURNAL OF NON-CRYSTALLINE SOLIDS,522,8.
MLA Lu, Ping,et al."Thermal and structural analysis of 40La(2)O(3)-10Nb(2)O(5)-(50-x)Al2O3-xBaO glasses".JOURNAL OF NON-CRYSTALLINE SOLIDS 522(2019):8.
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