Effect of Synthesis Time on Microscopic Characteristics of 12CaO·7Al₂O₃

Abstract:

The effect of synthesis time on phase compositions, lattice constant and surface morphology of samples synthesized at 1773K were analyzed by XRD and SEM. The results are: the main phase of sample synthesized for 30min is 12CaO•7Al₂O₃, besides it also has little quantity of CaO•Al₂O₃. When prolonging synthesis time the phase tends to be 12CaO•7Al₂O₃ only. The lattice constant increases as synthesis time prolongs. The micro-morphology of samples synthesized for different time changes greatly. There are more and bigger holes in samples synthesized for longer time than that of short time. The comprehensive influences of phase compositions, lattice constant and surface morphology caused the differences of alumina leaching ratio of 12CaO•7Al₂O₃ synthesized for different time.

• Periodical: Advanced Materials Research (Volumes 560-561)
• Pages: 263-266
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.560-561.263
• Online since: August 2012
• Authors: Bo Wang, Hui Lan Sun, Xue Zheng Zhang
• Keywords: Alumina Leaching, C₁₂A₇, Phase Compositions, Surface Morphology

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