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

SARAWUTH LABUAYAI1,2, SINEENAT SIRI3,2, SANTI MAENSIRI1,2,*

Affiliation

  1. Small & Strong materials Group (SSMG), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
  2. Integrated Nanotechnology Research Center (INRC), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
  3. Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand

Abstract

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 °C. The Y3Fe5O12 nanopowders were obtained after calcination of the precursors at various temperatures of 800, 900, 1000, and 1100 °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 at 800, 900, 1000, and 1100 °C, respectively. The cytotoxicity to NIH 3T3 of 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..

Keywords

Yttrium iron garnet, Synthesis, Nanopowders, Magnetic properties, Electron microscopy, Sol-gel process.

Submitted at: Feb. 13, 2008
Accepted at: Oct. 7, 2008

Citation

SARAWUTH LABUAYAI, SINEENAT SIRI, SANTI MAENSIRI, Synthesis of Yttrium Iron Garnet (Y3Fe5O12) nanopowders by a simple proteic sol-gel process, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 10, pp. 2694-2699 (2008)