铊-锗-硫三元素相平衡的实验研究

AN EXPERIMENTAL STUDY ON THE PHASE EQUILIBRIA IN THE Tl-Ge-S TERNARY SYSTEM

本文用抽真空石英管在干体系中对Tl-Ge-S三元系在300℃等温切面相关系和沿Tl_2-GeS_2及Tl_2-GeS变温切面假二元系相平衡进行了实验研究。 Tl-Ge-S三元系在300℃为三个液相区与三个二元相、八个三元相(包括三个固溶体)和十四个两相区、二十四个三相区稳定共存的复杂相关系。本实验首次合成了三个三元相(Tl_2Ge_(1-x)S_2、Tl_5Ge_(13)S_(24)、TlGe_3S_5)和三个固溶体相,即S·S·a(Tl_2^+Ge^(4+)S_3～Tl_2^+Ge_2^(2+)S_3)、S·S·b(Tl^+Ge_(0.5)^(2+)Ge_(0.5)^(4+)S_2～Tl^+Ge_3^(2+)S_4),S·S·c(Tl^+Ge_2^(2+)S_3～Tl_2^+Ge_5S_6)。

Phase equilibria of the 300℃ isotherm in the Tl-Ge-S ternary system andTl_2S-GeS_2 and Tl_2S-GeS polythermal pseudobinary section were investigated bymeans of evacuated quartz glass capsules in this work. In the Tl-Ge-S ternarysystem there exist complicated phase relationships at 300℃ with three liquidfluids and three binary phases and at least eight stable ternary phases(includi-ng three solid solution, series)and 38 two-phase and three-phase stable assembl-ages.