| 摘要 |
PURPOSE: A simple preparation method of high purity and fine titanate(TiO2) powder by a dissolution method using ethylene glycol is provided to save production costs and increase yield of TiO2 powder. CONSTITUTION: The preparation method of TiO2 powder comprises the steps of: (i) dissolving titanium isopropoxide or titanium isopropoxide(Ti(OC3H7)4) and metal nitrate as metal cations into ethylene glycol at 60-80deg.C, where the weight ratio of metal cations and ethylene glycol is 1:1-1:8, and metal nitrate is one compound selected from Ba(NO3)2, Sr(NO3)2, Al(NO3)3, Dy(NO3)3 and Ca(NO3)2: (ii) drying the solution at 100-120deg.C to form gel type precursors; (iii) calcining at 600-700deg.C and crystallizing at 700-900deg.C, resulting in TiO2 powder with 5.3-14.3m¬2/g surface area and 0.8-20micrometer size; (iv) wet ball-milling formed TiO2 powder in the medium of isopropyl alcohol to get fine TiO2 with a narrow particle size distribution, 14-25m¬2/g surface area and 0.04-1.2micrometer size. |
