Abstract
CaO formed by decomposing CaC0 3 at 1450 °C was ground in a vibrational mill. The variations of mechanochemical properties of the sample, such as surface area, crystal structure, surface free energy and reaction activity were studied. Inverse gas chromatography (IGC) was ised in the analysis of surface free energy of the sample. It is concluded that that total surface free energy increases with grinding. The London dispersive component of the surface free energy increases continuously with grinding, while the polar component firstly increases with grinding, and then decreases and finally disappears, when grinding proceeds. The activation of CaO powder was studied by measuring the dissolving and hydration rates of CaO powder in 1 mol/l HCl and distilled water, respectively. CaO ground for 200 h was reheated at different temperatures. With the recovery of lattice distortion and the recrystallization of the amorphous part, both the reaction activity and the surface free energy decrease, the polar component appears again.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
