Open AccessRelationship between thermophysical properties and structure of CMAS glass melts based on chromium slag
Author(s) -
Lei Deng,
Yun Fei,
Ruidong Jia,
Hao Li,
Da Ren,
Xuefeng Zhang,
Xiaolin Jia
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab6e30
Subject(s) - surface tension , viscosity , depolymerization , materials science , slag (welding) , chromium , raman spectroscopy , electrical resistivity and conductivity , thermodynamics , mineralogy , ceramic , composite material , metallurgy , chemistry , polymer chemistry , optics , physics , electrical engineering , engineering
In an attempt to determine the relationship among the network structure, viscosity, electrical conductivity, surface tension, and density of chromium-containing glass melts, the variation in glass melt thermophysical properties of the CaO–MgO–Al 2 O 3 –SiO 2 quaternary system were investigated by comprehensive physical property analysis and Raman spectroscopy. The results demonstrated that the network structural units Q n ( n = 0, 1, 2, 3) coexisted in the glass melts and their mutual transformation caused changes in the depolymerization degree, leading to a range of viscous activation energies, conductive activation energies, surface tension, and melt densities. Additionally, the logarithm of viscosity varied linearly with the logarithm of electrical conductivity (slope: 0.67–1.54). Meanwhile, the surface tension and melt density decreased with temperature. Consideration of these interrelations is indispensable during the development of chromium-containing slag glass ceramics, particularly for pilot and industrial applications.