[Spectra on the influence of grinding to kaolinite structure]

Kaolinite clay is one of important ceramic materials. In this paper, the kaolinite clay was ground by dry grinding and wet grinding. The powder samples ground for different time were measured by FTIR spectra and XRD, and the changing rules of the IR absorption frequency and XRD were respectively discussed. The results indicated that wet grinding was superior to dry one. Kaolinite structure began to change while it was ground by dry mothed for 12 h, and the layer structure was destroyed completely till 42 h. However, the day structure didn't change much until 54 h at the condition of wet grinding. The mechanism of the kaolinite structure changed were also discussed in detail.