Phase relations in the CaO-SiO2-H2O system to 200°C at saturated steam pressure
Phase relations in the CaO-SiO2-H2O system to 200°C at saturated steam pressure
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DOI：
10.1016/j.cemconres.2003.08.009
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发表时间：
2004-09-01
影响因子：
11.4
通讯作者：
Glasser, FP
中科院分区：
文献类型：
--
作者：
Hong, SY;Glasser, FP
采用结晶和非晶前驱体研究了标题体系中的相关系。这些在密封的钢合金高压釜中处理长达12个月。许多合成前体结晶，得到高纯度，单相制剂。虽然CaO-SiO2- H2O系统的特点是亚稳相的形成，它表明，一些重要的反应，建立低温相关系可以显示可逆地发生，因此定义的相平衡。新的稳定性数据提出了hillebrandite，afwillite，硬硅钙石，雪硅钙石和jennite。合成的铁铝尖晶石显示出具有类似于1.45的Ca/Si原子比，而不是小于报道的1.5比。根据新的认识提出了修正的相图。(C)2003爱思唯尔有限公司。保留所有权利。
Phase relations in the title system were studied using crystalline and amorphous precursors. These were treated in sealed steel alloy autoclaves for periods ranging up to 12 months. Many of the synthetic precursors crystallised to give high purity, single-phase preparations. Although the CaO - SiO2 - H2O system is marked by metastable phase formation, it is demonstrated that a number of reactions important to establish the low-temperature phase relationships can be shown to occur reversibly and therefore define the phase equilibrium. New stability data are presented for hillebrandite, afwillite, xonotlite, tobermorite and jennite. Synthetic jennite is shown to have a Ca/Si atomic ratio similar to 1.45, rather less than the reported 1.5 ratio. A phase diagram revised in light of new knowledge is presented. (C) 2003 Elsevier Ltd. All rights reserved.