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eutectic point 【化學】低共熔點。

eutectoid

The infinite solid insoluble phase diagram , i . e . , the phase diagram with a eutectic point . the infinite liquid insoluble phase diagram , i . e . , the phase diagram with a shared boiling point . all the phase diagrams we obtained are quite analogous to the behavior of the three - dimensional substances 這些典型的相圖主要包括:無限相互溶解的“雪茄型”相圖和具有一個極值等濃度點相圖;完全不相互溶解的固液低共晶點的相圖和完全不相互溶解的低共沸點相圖等等。

This article choosed out organic phase change materials , and , the solid - liquid - equilibrium of eleven binary system including fatty alcohol / fatty acid , n - octadecane / fatty acid , n - octadecane / fatty alcohol system were determined by cooling curve , and , t - x phase diagrams of these systems were drawn . the result shows that all these systems are simple eutectic , at the same time , the entropy of phase change of every system in the eutectic point is determined by using differential scanning calorimetry ( dsc ) . and n - octadecane / fatty acid systems were calculated theoretically 本文初選出部分有機相變貯能材料,采用步冷曲線法測定了12醇-羧酸系列、 18烷-羧酸系列、 18烷- 12醇體系共11組體系的二元固液相平衡關系,繪制了這11組體系的t - x相圖,測定結果表明,這幾組體系均為簡單低共熔體系;同時利用差熱掃描量熱法( dsc )對上面各組體系低共熔點處的相變焓進行了測定;并對18烷-羧酸系列進行了熱力學理論預測。

The result shows that all these system are simple eutectic , at the same time , the entropy of phase change of every system in the eutectic point is determined by using differential scanning calorimetry ( dsc ) on the basis of experimental research , through the improved one - parameter margules equation by introducing a new variable temperature , the improved equation was designed to compute solid - liquid equilibrium 測定結果表明,這幾組體系均為簡單低共熔體系;同時利用差熱掃描量熱法( dsc )對上面各組體系低共熔點處的相變焓進行了測定。在實驗研究的基礎上,通過改進單參數margules方程并引入新的變量溫度,達到了將此方程用于固液平衡計算的目的。