Paper Title:
Surface Coating of Anhydrite Powders with CaCO3 Nano-Particles Prepared in Ca(OH)2-H2O-CO2 System
  Abstract

Anhydrite powders with nanostructure surface were prepared in Ca(OH)2-H2O-CO2 system. The effects of preparation parameters such as Ca(OH)2 concentration, revolution speed of mixer, temperature on surface finish and reaction speed were investigated. SEM was used to observe the changes of the morphology of anhydrite powders before and after surface coating. The results show that the appropriate condition is: the concentration of Ca(OH)2 should be 2~3%, the temperature between 20~25°C is better, the revolution speed should be big enough and so on. In order to gain nanostructure surface, appropriate technological parameter should be chosen carefully. The SEM photographs show that Anhydrite powders had fine surface morphology after surface finish that the smooth cleavage planes were coated with nanometer particles and the sharp edge angles were blunt by the coating of CaCO3 nanometer particles.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
961-964
DOI
10.4028/www.scientific.net/KEM.336-338.961
Citation
W. Liu, G. S. Gai, Q. Xie, Y. F. Yang, "Surface Coating of Anhydrite Powders with CaCO3 Nano-Particles Prepared in Ca(OH)2-H2O-CO2 System", Key Engineering Materials, Vols. 336-338, pp. 961-964, 2007
Online since
April 2007
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