Temperature-Induced Reversible Change of Electrical Resistivity in Sn–Bi Melts
Temperature-Induced Reversible Change of Electrical Resistivity in Sn–Bi Melts
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DOI：
10.1007/s10765-009-0612-4
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发表时间：
2009-06
影响因子：
2.2
通讯作者：
Xianfen Li;Chengming Hu;F. Zu;Zhong-yue Huang;Ming-quan Liu
中科院分区：
文献类型：
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作者：
Xianfen Li;Chengming Hu;F. Zu;Zhong-yue Huang;Ming-quan Liu
使用直流四探针方法，研究了液态 Sn-Bi 合金电阻率的温度依赖性。结果表明，几个实验周期的加热和冷却都存在明显的转折点。由于电阻率是对结构敏感的物理性质之一，电阻率的异常变化表明Sn-Bi熔体中可能发生液-液转变（LLT）。此外，转变是可逆的。与纯Sn和Bi的实验结果相比，假设Sn在可逆液-液转变中起着重要作用。
Using a dc four-probe method, the temperature dependence of the electrical resistivity of liquid Sn–Bi alloys has been investigated. The results show that there are clear turning points both on heating and cooling for several experimental cycles. Since the electrical resistivity is one of the physical properties sensitive to structure, the unusual change of the resistivity indicates that liquid–liquid transitions (LLT) probably take place in Sn–Bi melts. Moreover, the transitions are reversible. Compared with the experimental results for pure Sn and Bi, it is assumed that Sn plays an important role in the reversible liquid–liquid transitions.