y Incorporation of Al and Na in Hydrothermally Synthesized Tobermorite

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	y Incorporation of Al and Na in Hydrothermally Synthesized Tobermorite
	Wang, Zehua 1,2; Ma, Shuhua 1; Zheng, Shili 1; Wang, Xiaohui 1
刊名	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
	2017-02-01
卷号	100 期号:2 页码:792-799
关键词	aluminosilicates calcium silicate hydrate sodium/sodium compounds
ISSN号	0002-7820
英文摘要	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+.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Ceramics
研究领域[WOS]	Materials Science
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000394545900040
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/22106]
专题	过程工程研究所_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
推荐引用方式 GB/T 7714	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.