Characterization of alpha-cordierite glass-ceramics from fly ash.
Batches of alpha-cordierite glass-ceramics, designated as GC-I and GC-II, containing 68 and 64 wt.% fly ash, respectively, were crystallized in the temperature range of 1125-1320 degrees C. The XRD (X-ray powder diffractometer) of the glass-ceramics show that alpha-cordierite became the dominant phase in GC-I and GC-II at 1200 degrees C. GC-I and GC-II, whose solid parts contain 74 and 78 vol.% alpha-cordierite and whose compressive strengths are 35 and 50 MPa, respectively, have the respective linear thermal expansion coefficients of 1.51x10(-6) and 1.43x10(-6)/ degrees C. The fly ash alpha-cordierite glass-ceramics can be employed as kiln furniture, honeycomb substrates for catalysts, and heat exchangers.
He
Yong
Y
Materials Science and Chemical Engineering College, China University of Geosciences, 430074 Wuhan, PR China. heyongyu@263.net
Cheng
Weimin
W
Cai
Hesheng
H
D002244:Carbon; D002516:Ceramics; D003031:Coal; D060729:Coal Ash; D003460:Crystallization; D005898:Glass; D007220:Industrial Waste; D008422:Materials Testing; D052638:Particulate Matter; D011210:Power Plants; D013696:Temperature
D003031:Coal; D060729:Coal Ash; D007220:Industrial Waste; D052638:Particulate Matter; D002244:Carbon