Premium
Crystallization characteristics and properties of high‐performance glass‐ceramics derived from baiyunebo east mine tailing
Author(s) -
Baowei Li,
Yongsheng Du,
Xuefeng Zhang,
Ming Zhao,
Hua Chen
Publication year - 2014
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12006
Subject(s) - crystallization , materials science , nucleation , augite , magnetite , ceramic , scanning electron microscope , precipitation , mineralogy , glass ceramic , phase (matter) , differential thermal analysis , metallurgy , chemical engineering , composite material , diffraction , geology , chemistry , plagioclase , engineering , quartz , physics , organic chemistry , optics , meteorology
High‐performance glass‐ceramics of CaO‐MgO‐Al 2 O 3 ‐SiO 2 quaternary system were successfully produced by the method of melting, using Baiyunebo east mine tailing and fly ash as main sources of raw materials. The combined effects of intergrowth of multiple nucleating agents on the crystallization and properties of the glass‐ceramics were systematically investigated by differential thermal analysis, X‐ray diffraction, scanning transmission electron microscope (STEM), scanning electron microscope, and mechanical testing. The results shown phase separation occurred first in the iron‐rich region (magnetite) in the initial stage of nucleation and it can provide the core of nucleation for the consequent precipitation of augite crystalline. Direct evidence for the appearance of magnetite in the process of nucleation treatment was observed using STEM. The glass‐ceramic with 35.5 wt % tailing addition has shown highest degree of crystallization, which can result in higher bending strengths and acid‐resistance. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 420–426, 2015