The Effect of Sintering Temperature on the Structure and Conductivity of the Yttrium Iron Garnet (Y3Fe5O12) Nanocrystallite Phase

Nano-crystalline Yttrium iron garnet (Y3Fe5O12) phase was prepared at various sintering temperature by the usual ceramic method. X-ray diffraction studies indicated the presence of cubic single phase when sample sintering at 1400 o C for 12 hours. The Mossbauer spectra indicate the presence of Fe 3+ in (A) site and (D) site and the ratio of the two peak area ID/IA equal 1.58 for sample sintered at 1400 o C. A dielectric measurement shows that the sample sintered at 1300 o C has higher conductivity. The difference in dielectric behavior is due to factors such as ceramic density, the change of microstructure shape, and presence of mixing phases with difference ratio for sample sintered at 1100 o C and 1300 o C and pure cubic phase for sample sintered at 1400 o C.