Synthesis of SrAl12O19 via citric acid precursor

The citric acid precursor method was used to synthesize SrAl12O19. The effects of the pH of the starting solutions on the formation of SrAl12O19 were investigated. Single-phase SrAl12O19 was derived from precursor with unadjusted pH at 1200 °C for 2 h. Increasing the pH of the starting solutions to 7, the formation temperature of single-phase SrAl12O19 increased to 1300 °C. Differential thermal analysis and thermogravimetric (DTA/TG), X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM) were used to characterize the precursors and the derived oxide powders.