Synthesis of Yttrium Iron Garnet (Y3Fe5O12) nanopowders by a simple proteic sol-gel process

摘要

Yttrium iron garnet Y3Fe5O12 nanopowders were synthesized by a proteic sol-gel process using coconut water as a solvent. The polymeric precursors were characterized by TG-DTA to determine the thermal decomposition and crystallization temperature which was found to be at above 800 degrees C. The Y3Fe5O12 nanopowders were obtained after calcination of the precursors at various temperatures of 800, 900, 1000, and 1100 degrees C. The prepared samples were characterized by XRD, SEM, and TEM techniques. The particle sizes estimated from XRD were in the range of 22-55 nm. The size of magnetic nanoparticles increased with increasing calcination temperature. The study of magnetic properties by VSM at room temperature showed that the samples are ferromagnetic, having the specific magnetizations of 2.6, 5.3, 8.3, and 17.1 emu/g at 10 kOe for Y3Fe5O12 samples calcined at800, 900, 1000, and 1100 degrees C, respectively. Thecytotoxicityto NIH 3T3of the prepared Y3Fe5O12 samples was evaluated by MTT assay. The results showed the low cytotoxicity in the calcined Y3Fe5O12 samples, which are useful for biomedical applications.