论文部分内容阅读
本文用目视变温法和DSC方法研究了NaSCN-CO(NH_2)_2二元系和NaSCN-CH_3COONa-CO(NH_2)_2三元系的相图。实验结果表明NaSCN-CO(NH_2)_2二元系中存在一个不相合熔点化合物NaSCN·2CO(NH_2)_2,它的转熔点为:75.5℃,33.0%CO(NH_2)_2,它和CO(NH_2)_2间的低共熔点为:66.0℃、28.0%CO(NH_2)2;NaSCN-CH_3COONa-CO(NH_2)_2三元系的相图存在两个四相不变点,它们分别为:61.0℃、61.0%CO(NH_2)_2、24.0%NaSCN和54.0℃、65.0%CO(NH_2)_2、20.0%NaSCN。
In this paper, the phase diagrams of NaSCN-CO (NH_2) _2 binary system and NaSCN-CH_3COONa-CO (NH_2) _2 ternary system were studied by visual thermometry and DSC. The experimental results show that NaSCN · 2CO (NH_2) _2 exists in NaSCN-CO (NH_2) _2 binary system and its melting point is 75.5 ℃ and 33.0% CO (NH_2) _2, ) _2 eutectic points are: 66.0 ℃, 28.0% CO (NH_2) 2; There are two four-phase invariant points in the phase diagram of NaSCN-CH_3COONa-CO (NH_2) _2 ternary system, , 61.0% CO (NH_2) _2, 24.0% NaSCN and 54.0 ℃, 65.0% CO (NH_2) _2, 20.0% NaSCN.