06 Jun Figure 2 displays different X-ray diffraction patterns of MgFe
2O4 nanoparticles with temperature varying from 500 to 800°C. The two ferrite samples www.loansolution.com/installment-loans-az calcined at 500–600°C were obtained as single spinel phase with peaks at 220, 311, 400, 511, and 440, corresponding to the cubic spinel structure (JCPDS card. no. 01-071-1232) . It is showed that the increase in temperature is associated with the improvement of MgFe2O4 powders. However, from 700 to 800°C, new phases of ?-Fe2O3 were observed. The spinel phase of MgFe2O4 was confirmed by five XRD peaks at 220, 311, 400, 511, and 440 crystal planes. Results reported in Table 1 also indicate that the crystallite size of MgFe2O4 was positively associated with the calcination temperature. As temperature moved from 500 to 800°C with 100°C interval, the average crystallite size was expanded from 18 to 61 nm.