MAS-NMR studies of carbonate retention in a very wide range of Na2O-SiO2 glasses
MAS-NMR studies of carbonate retention in a very wide range of Na2O-SiO2 glasses
复制标题
MAS-NMR 研究各种 Na2O-SiO2 玻璃中碳酸盐的保留
DOI:
10.1016/j.jnoncrysol.2020.119958
复制
发表时间:
2020
影响因子:
3.5
通讯作者:
Barrow N
中科院分区:
文献类型:
--
作者:
Barrow N
Glasses that contain carbon are of geological interest, and the form of that carbon can be probed by Magic-Angle Spinning Nuclear Magnetic Resonance (MAS-NMR) spectroscopy. Previous studies of the Na2O-SiO2glass system could only reach 56 mol% Na2O. Here we reproduce and extend those studies to cover a very wide compositional range, from 20 to 70 mol% Na2O, by using a combination of conventional melt-quench and twin roller quenching technologies on natural and 99%13C-enriched sodium silicate glasses.13C MAS-NMR reveals that measurable levels of carbon retention occur above at least 40 mol% Na2O, and takes the form of CO32−ions incorporated in the glass structure. These CO32−anions are surrounded by Na+cations, forming nanoscale domains in a sodium silicate glass network.23Na MAS-NMR showed a linear decrease in mean Na—O bond length with increasing Na2O content, up to 60 mol% Na2O, above which the mean Na—O bond length increased. Elemental analysis detected significant (>5%) carbon dioxide by mass in the 65 and 70 mol% Na2O glasses. For the 70 mol% Na2O glass,13C and23Na MAS-NMR detected ordered nanoscale domains composed of only Na2O and CO2. These results have shown the quantity and nature of carbon retention in the archetypal sodium silicate glass system, which will better inform structural models and carbonate solubility limits.
登录
查看更多内容
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
Hongxun Zhang;S. Koritala;K. Farooqui;R. Boekenhauer;D. Bain;S. Kambeyanda;S. Feller
通讯作者:
S. Feller
影响因子:
3.5
作者:
S. Prasad;T. Clark;T. H. Sefzik;H. Kwak;Z. Gan;P. Grandinetti
通讯作者:
S. Prasad;T. Clark;T. H. Sefzik;H. Kwak;Z. Gan;P. Grandinetti
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
J. Kasper;S. Feller;G. Sumcad;D. C. Boyd
通讯作者:
D. C. Boyd
DOI:
10.1107/s0108768103009017
发表时间:
2003-06-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE
影响因子:
--
作者:
Dusek, M;Chapuis, G;Petricek, V
通讯作者:
Petricek, V
影响因子:
3.3
作者:
Jones, AR;Winter, R;Smith, IH
通讯作者:
Smith, IH