Kinetic fragility of binary and ternary glass forming liquid mixtures
Kinetic fragility of binary and ternary glass forming liquid mixtures
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二元和三元玻璃形成液体混合物的动力学脆性
DOI：
10.1140/epje/i2011-11086-7
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发表时间：
2011-09-01
影响因子：
1.8
通讯作者：
Wang, Li-Min
中科院分区：
文献类型：
--
作者：
Gong, Hongxiang;Sun, Mingdao;Wang, Li-Min
可混溶的二元和三元玻璃形成混合物中液体脆性的实验研究揭示了混合后脆性与组分的线性平均值的负偏差的一般观察结果。从理想混合模式、近理想混合模式到非理想混合模式的进一步分析表明，偏离幅度并不随混合焓单调增加，并且适度的分子间相互作用将产生最大的脆性降低。四个低共熔体系，甲基邻甲苯甲酸甲酯-甲基对甲苯甲酸，ZnCl 2-AlCl 3，甘油-水，和果糖-水，进行了研究，以找到最大的脆性偏差发生在相图中的组合物。结果表明，脆性最小值的成分与共晶点并不一致。结果部分解释了实验观察到的最佳玻璃形成区域并不位于共晶成分处。
The experimental studies of liquid fragility in miscible binary and ternary glass forming mixtures reveal a general observation of the negative deviation in fragility upon mixing from the linear average of those of the components. Further analyses from ideal, near ideal to non-ideal mixing modes show that the deviation magnitude does not increase monotonically with mixing enthalpy, and a moderate intermolecular interaction would generate a largest reduction in fragility. Four eutectic systems, methyl-o-toluate-methyl-p-toluate, ZnCl2-AlCl3, glycerol-water, and fructose-water, are studied to locate the composition where the largest fragility deviation occurs in phase diagrams. It is found that the compositions with the fragility minima do not coincide with the eutectic points. The results partly explain the experimental observation that the best glass forming region is not located at the eutectic composition.