Phase equilibria in the PbSb₂Te₄–InSb system

• Published in: Thermochimica acta Vol. 520; no. 1-2; pp. 80 - 83
• Main Authors: Vassilev, V, Atanassova, D, Mihaylova, I, Parvanova, V, Aljihmani, L
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 10.06.2011; Elsevier
• Subjects: ambient temperature; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; melting; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase diagrams of other materials; physical phases; Physics; X-ray diffraction; Phase diagrams; Semiconductor materials; Semiconductors; Ternary compounds; Lead Tellurides; X-ray diffraction; Binary systems; Differential thermal analysis; XRD; Indium Antimonides; Antimony Tellurides; Chalcogenides; Phase equilibria; Thermal analysis
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2011.03.019

A phase diagram of the PbSb₂Te₄–InSb system, which is polythermal cross section of the three-component PbTe–Sb₂Te₃–InSb system, was built using DTA, XRD, microhardness and density measurements. The system contains the PbSb₂Te₄·(2±δ)InSb compound of variable composition, incongruently melting at 530±5°C, and with asymmetric area of homogeneity shifted to the side rich in InSb (+δ=0–2). The PbSb₂Te₄·2InSb compound crystallizes in orthorhombic symmetry with unit cell parameters: a=7.7640Å; b=6.4144Å; and c=3.6010Å, α=β=γ=90°. The system also contains PbSb₂Te₄ and InSb based boundary solid solutions extended from 0 to 10 and from 95 to 100mol% InSb, respectively, at room temperature.