Density Measurements of Low Silica CaO-SiO2-Al2O3 Slags
Density Measurements of Low Silica CaO-SiO2-Al2O3 Slags
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DOI：
10.1007/s11663-010-9385-1
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
L. Muhmood;S. Seetharaman
中科院分区：
文献类型：
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作者：
L. Muhmood;S. Seetharaman
利用阿基米德原理对低硅CaO-SiO 2-Al 2 O 3体系的密度进行了测量。为此目的，使用Pt 30%Rh摆锤和导线布置。所获得的结果是在良好的协议，从本集团开发的模型，以及与其他结果报告较早。根据三元渣系的密度估算了CaO-SiO_2和CaO-Al_2 O_3二元渣系的密度。高硅系统的密度值的外推也表现出良好的协议与以前的作品。根据现有的实验数据对CaO的密度值进行了估算。根据硅酸盐结构解释了高温下密度的降低。当SiO2的摩尔百分比低于正硅酸盐组成所需的33%时，硅酸盐熔体中的离散四面体单元将沿着O2-离子存在。熔体膨胀率的变化可能是由于离子膨胀的顺序，在三元渣的结构变化也可以与混合焓值的急剧变化。
Density measurements of a low-silica CaO-SiO2-Al2O3system were carried out using the Archimedes principle. A Pt 30 pct Rh bob and wire arrangement was used for this purpose. The results obtained were in good agreement with those obtained from the model developed in the current group as well as with other results reported earlier. The density for the CaO-SiO2and the CaO-Al2O3binary slag systems also was estimated from the ternary values. The extrapolation of density values for high-silica systems also showed good agreement with previous works. An estimation for the density value of CaO was made from the current experimental data. The density decrease at high temperatures was interpreted based on the silicate structure. As the mole percent of SiO2was below the 33 pct required for the orthosilicate composition, discretetetrahedral units in the silicate melt would exist along with O2–ions. The change in melt expansivity may be attributed to the ionic expansions in the order ofStructural changes in the ternary slag also could be correlated to a drastic change in the value of enthalpy of mixing.