Open AccessDETERMINATION AND MODELING OF THE LIQUIDUS SURFACE, VAPOR PRESSURE AND IMMISCIBILITY BOUNDARIES IN THE Cu–Pb–S SYSTEM
Author(s) -
Н. Б. Бабанлы,
AUTHOR_ID,
M. Bulanova,
A.N. Mustafaeva,
A.N. Mammadov,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2021
Publication title -
azərbaycan kimya jurnalı/azerbajčan himiâ žurnaly
Language(s) - English
Resource type - Journals
eISSN - 2522-1841
pISSN - 0005-2531
DOI - 10.32737/0005-2531-2021-4-35-42
Subject(s) - liquidus , vapor pressure , ternary operation , sulfide , supercooling , sulfur , crystallization , thermodynamics , conductivity , ternary numeral system , analytical chemistry (journal) , chemistry , materials science , mineralogy , metallurgy , physics , alloy , chromatography , computer science , programming language
For the first time using a membrane zero-manometer, the vapor pressure S2 over the surface of the PbS liquidus in the ternary system Cu–Pb–S were determined in the range 1100÷1400 K and 0÷760 mm Hg. Based on the thermodynamic calculation, the boundaries of the immiscibility of liquid alloys of the Cu–S, Pb–S, and Cu–Pb–S systems were determined and analytically described. Critical temperatures and pressures for immiscibility regions of sulfur-rich liquid alloys are characterized by high values: Tcr= 1520÷1880 K; Pcr=170÷510 atm. The crystallization surfaces of lead sulfide with electronic conductivity (p-type PbS) and with hole conductivity (n-type PbS) are calculated and analytically de-scribed, as well as the corresponding values of sulfur vapor pressure over the crystallization surface of lead sulfide. All analytical dependencies for 3D modeling were obtained and visualized using the OriginLab computer program