论文部分内容阅读
测量了含Ｔｅ４０％～７０％（ａｔ．）的液态Ｂｉ－Ｔｅ合金在７００～８５０℃和含Ｓｅ４０％～６５％（ａｔ．）的液态Ｂｉ－Ｓｅ合金在７００～９００℃的电阻率．得到在所述成分范围内，液态Ｂｉ－Ｔｅ合金保持金属导电性；而对于液态Ｂｉ－Ｓｅ合金，当成分接近Ｂｉ２Ｓｅ３配比时，发生金属－非金属转变．从原子间键合方式和能态特征，解释了液态Ｂｉ－Ｓｅ合金发生金属－非金属转变，而液态Ｂｉ－Ｔｅ合金保持金属性的原因．
The resistivity of the liquid Bi-Te alloy containing Te40% ~ 70% (at.) At 700 ~ 900 ℃ and the Bi-Se alloy containing 40% ~ 65% (at. In the composition range, the liquid Bi-Te alloy retains the metal conductivity, whereas for the liquid Bi-Se alloy, the metal-nonmetal transition occurs when the composition approaches the Bi2Se3 ratio. The reason of the metal-nonmetal transition in the liquid Bi-Se alloy and the retention of the metal properties of the liquid Bi-Te alloy are explained from the bonding mode and energy state characteristics of the atoms.