Abstract: In this paper, ZnO/γ-Al_2O_3 system has been studied by XRD and XPS. Ex- perimental results show that ZnO reacts with γ-Al_2O_3 in solid state extremely readily, and it can be observed after heating at 240 ℃.
The structure and state of samples depond on the conditions of calcination and the composition of samples. The samples with less ZnO are made up of zinc-defi- cient zinc aluminate (Zn_xAl_2O_(3+x), 0It was estimated that most samples except those calcined at high temperature have not reached the equilibrium states. So, their structure and character should be closely related to the conditions of preparation and operation.