Thermal and structural analysis of 40La(2)O(3)-10Nb(2)O(5)-(50-x)Al2O3-xBaO glasses
文献类型:期刊论文
作者 | Lu, Ping1,2; Zhang, Yixuan1; Li, Jianqiang3 |
刊名 | JOURNAL OF NON-CRYSTALLINE SOLIDS |
出版日期 | 2019-10-15 |
卷号 | 522页码:8 |
ISSN号 | 0022-3093 |
关键词 | La2O3-Nb2O5-Al2O3 glass Thermal properties Structure Crystallization kinetics |
DOI | 10.1016/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. |
WOS关键词 | CRYSTALLIZATION KINETICS ; ALUMINOSILICATE GLASSES ; ALUMINATE GLASSES ; OPTICAL-PROPERTIES ; HIGH-TEMPERATURE ; AL COORDINATION ; RAMAN ; ER3+/YB3+ ; NMR ; SILICATE |
资助项目 | National Key Research and Development Program of China[2016YFC0700905] ; National Natural Science Foundation of China[51674232] |
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 |
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 GB/T 7714 | 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. |
入库方式: OAI收割
来源:过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。