XPS and NMR analysis on 12CaO?7Al2O3

1st International Conference on New Material and Chemical Industry

材料科学;化学工业

Pan, R.K.^1,2 ; Feng, S.^2 ; Tao, H.Z.^2

School of Materials Science and Engineering, Hubei University, Wuhan

430062, China^1

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan

430070, China^2

关键词: Bridging oxygen;    Coordination number;    Crystallization temperature;    Glass network;    Magic angle spinning nuclear magnetic resonance spectroscopy;    Melt quenching method;    NMR analysis;    Non-bridging oxygen;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/167/1/012017/pdf
DOI  :  10.1088/1757-899X/167/1/012017

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

12CaO•7Al2O3(C12A7) glass was prepared by the melt quenching method. The glass transition temperature (Tg) and the crystallization temperature (Tc) of C12A7 glass are about 1050 K and 1194 K, respectively, measured by the differential scanning calorimetry (DSC). The structure of C12A7 glass was investigated by X-ray photoelectron spectroscopy (XPS) as well as magic angle spinning-nuclear magnetic resonance spectroscopy (MAS-NMR). Analysis shows that Al coordination number is about four in C12A7 glass, in which AlO4tetrahedrons and bridging oxygens (BO) constitute the glass network. Ca2+produces a few of non-bridging oxygens (NBO), which become neighbours of Al.