The Synthesis of <tex>$Fe_3O_4$</tex> Powder through Glycothermal Process

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J. Korean Ceram. Soc. > Volume 34(11); 1997 > Article

Journal of the Korean Ceramic Society 1997;34(11): 1159.

Glycothermal Process에 의한 $Fe_3O_4$ 분말 합성

노준석, 조승범¹, 최상흘

한양대학교 무기재료공학과

The Synthesis of $Fe_3O_4$ Powder through Glycothermal Process

¹Dept. of Ceramics, Coll. of Eng. Rutgers Univ

ABSTRACT

Magnetite(Fe3O4) powders were synthesized through glycothermal reaction by using crystalline $alpha$-FeOOH as precursor and ethyleanne glycol as solvent. The phase, morphology and particle size of synthesized powders were characterized by XRD and an SEM. When only ethylene glycol was used as solvent, the phase was transformed from $alpha$-FeOOH to $alpha$-Fe2O3 and finally Fe3O4 at 27$0^{circ}C$ for 6hr without morphological change. But by addition of water, Fe3O4 powders were synthesized at 23$0^{circ}C$ for 3hr through solution-recrystalization process. As the content of water addition increased, the particle shape changed from sphere to octahedron and the partcle size increased. When the excess amount of water added, residual $alpha$-FeOOH or $alpha$-Fe2O3 was recrystalized.

Key words: Magnetite, Ethylene glycol, Morphology, Particle size, Water addition, Solution- recrystalization, Glycothermal reaction