y Incorporation of Al and Na in Hydrothermally Synthesized Tobermorite
Wang, Zehua1,2; Ma, Shuhua1; Zheng, Shili1; Wang, Xiaohui1
2017-02-01
发表期刊JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN0002-7820
卷号100期号:2页码:792-799
摘要Calcium silicate hydrate and its Al-substituted form synthesized by a hydrothermal process were investigated by X-ray diffraction, compositional analysis, and magic-angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy, in order to determine the mechanism of Al and Na incorporation in the tobermorite structure with varying molar ratios of Ca/Si and Al/Si. At a high molar ratio of Ca/Si, the silicate chains of tobermorite are ruptured, the degree of polymerization of the silicate chains is lowered, and the high calcium concentration lowers the content of Na2O in the structure. Solid-state Si-29 and Al-27 MAS NMR spectroscopy confirm that all Al atoms were incorporated in the silicate chains of tobermorite. The tetrahedrally coordinated Al (Al(IV)) could either act as the bridging tetrahedron (Q(B)(2)) for the dreierketten chain of tobermorite, or be present in Q(3) sites that link two dreierketten chains together. Therefore, the degree of polymerization of the silicate chains of tobermorite is increased at high molar ratio of Al/Si. Furthermore, the greater charge deficit due to the replacement of Si4+ by Al3+ ions is compensated by increased adsorption or binding of Na+.
关键词Aluminosilicates Calcium Silicate Hydrate Sodium/sodium Compounds
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1111/jace.14599
收录类别SCI
语种英语
关键词[WOS]C-S-H ; CALCIUM-SILICATE-HYDRATE ; NUCLEAR-MAGNETIC-RESONANCE ; ALUMINA FLY-ASH ; ALUMINOSILICATE-HYDRATE ; MAS NMR ; SUBSTITUTED TOBERMORITES ; CEMENT PASTES ; AL-27 ; SI-29
WOS研究方向Materials Science
WOS类目Materials Science, Ceramics
项目资助者National Basic Research Program (973 Program)(2013CB632601) ; National Natural Science Foundation of China(51274179)
WOS记录号WOS:000394545900040
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22106
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
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Wang, Zehua,Ma, Shuhua,Zheng, Shili,et al. y Incorporation of Al and Na in Hydrothermally Synthesized Tobermorite[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2017,100(2):792-799.
APA Wang, Zehua,Ma, Shuhua,Zheng, Shili,&Wang, Xiaohui.(2017).y Incorporation of Al and Na in Hydrothermally Synthesized Tobermorite.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,100(2),792-799.
MLA Wang, Zehua,et al."y Incorporation of Al and Na in Hydrothermally Synthesized Tobermorite".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 100.2(2017):792-799.
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