抄録
The aim of this work is to prepare and characterize AlPO4 and FePO4 with different methods depending on the precursors materials. AlPO4 was prepared from aluminium ethoxide Al(OEt)3 and phosphoric acid, Al(OEt)3 and ethyl phosphate (Et)3 PO4 and aluminium chloride with phosphoric acid in presence of ethylene oxide gas as a gelating agent. FePO4 was prepared by dissolution of Fe2O3 in H3PO4 and from FeCl3 with H3PO4 in presence of ethylene oxide.
The prepared samples were characterized by chemical and thermal analyses, x-ray diffraction and infrared spectroscopy. Infra-red charts indicate that the specific groups of the phosphate salts are appeared in all samples. X-ray diffraction patterns show that the crystalline phases of the product depend on the precursors material, the method of preparation and the temperature and time of sintering. The DTA curves indicate that no changes are observed between 300-700°C.
