2022年7月1日 · In this study, synthetic C(-A)-S-H with Ca/Si and Al/Si ratios of 0.8–1.0 and 0.1–0.3, respectively, was cold-pressed into compacts. Then, nanoindentation was used to investigate the effects of Ca/Si and Al/Si ratios on the hardness and elastic and creep moduli.

2017年11月30日 · Incorporation of Al increases main basal spacing, amount of bounded water and decreases crystallinity of C-(A)-S-H (calcium (aluminium) silicate hydrate). Transmission electron microscope observations showed that aluminium results in formation of more compacted, foil-like microstructure.

2021年9月15日 · The Si-Ca-Al-P system is one of the most crucial alloy systems for Si refining, where P can be separated by either the Si-Al solvent refining or the Si-Ca alloying-leaching process. In this work, a series of Si-Ca-Al alloys were obtained to investigate the role of alloy composition and the CaAl 2 Si 2 phase in P segregation and separation.

The results showed that the Ca/Si ratio, Al/Si ratio and Mg/Si ratio had a significant influence on the structure, carbonation products and carbonation resistance of C- (M)- (A)-S-H. The mean chain length of silicate chains in C-S-H increased as the Ca/Si ratio decreased.

铝硅酸盐是指硅酸盐中的SiO4四面体的一部分由AlO4四面体取代组成，如 正长石 KAlSi3O8。 也可写为K [ (AlO2) (SiO2)3]，表示四分之一的含氧四面体被 铝 原子所占据，还有 钙长石 CaAl2SiO8或Ca [ (AlO2)2(SiO2)2]，其中一半是AlO4四面体，另一半是SiO4四面体。 天然的 分子筛 泡沸石 （Na2O·Al2O3·2SiO2·nH2O）是一类含有 结晶水 的铝硅酸盐，是一种新型的高效选择性 吸附剂，可用于 分离 气体或液体。 可由 硅酸钠 、 偏铝酸钠 和 氢氧化钠 以一定比例 混 …

2012年1月25日 · It is found that Al substitutes Si mainly in bridging positions and moderately in pairing positions in some conditions. Al in pairing site is observed only for Ca/ (Si+Al) ratios greater than 0.95 (equivalent to 4 mmol.L –1 of calcium hydroxide).

2007年5月23日 · To discuss the possibility and efficiency of impurity elimination process, the evaluation of their thermodynamic properties in molten Si are crucial. In the present work, the self-interaction parameters of Al, Ca, and Mg and interaction parameters between Ca–M (M: Al, Ti, Fe) in molten Si at 1723 K were investigated by applying a chemical ...

2014年2月1日 · 摘要 研究了 Ca 和 P 的组合添加对高纯度 Al-7 wt pct Si 合金的 Al-Si 共晶形核的影响。 进行热分析和断续凝固实验以获得共晶反应的特征温度并研究 Al-Si 共晶的宏观生长模式。

2017年10月13日 · The phase transformations in the Al-Ca-Mg-Si system have been studied using thermodynamic calculations and experimental methods. We show that at 10% Magnesium (Mg), depending on the concentrations of calcium (Ca) and silicon (Si), the following phases crystallize first (apart from the aluminum (Al) solid solution): Al4Ca, Mg2Si, and Al2CaSi2.

2014年2月15日 · Al 2 Si 2 Ca intermetallics precipitated when the Ca content exceeded 100 ppm and were predominantly P-enriched. In addition, the possibility of Ca 3 P 2 formation is discussed. It is suggested that the principal effect of Ca is poisoning of AlP particles and deactivation of residual P in the melt leading to a higher recalescence undercooling.