US EPA

5340022 

Journal Article 

Preparation of barium ferrite nanoparticles from a nonaqueous precursor 

Deb, P; Ghosh, S; Basumallick, A; Bandyopadhyay, NR 

2004 

Yes 

Indian Journal of Physics. Part A
ISSN: 0252-9262 

78A 

1 

67-69 

WOS:000188925400011 

Nanosized barium ferrite particles were prepared from a nonaqueous precursor by thermolysis. The precursor medium comprise calculated amount of stearic acid iron(III) nitrate and barium carbonate. Thermolysis of the precursor at 125 C, causes precipitation of Fe2O3 and BaO in the stearic acid medium. The precursor medium gradually turns viscous as function of thermolysis time. Heat treatment (400 degreesC for 1 hr) of powder precipitates obtained by centrifugation of tetrahydrofuran (THF) treated thermolysed precursor yields nanosized barium ferrite particles. The chemical and thermal characteristics of the powder precipitates were studied with the aid of Fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC). X-Ray diffraction (XRD) studies carried out on the heat treated powder sample reveal the presence of nanosized barium ferrite particles. Results of the XRD line profile analysis and transmission electron microscopic (TEM) analysis show that the average size of the barium ferrite particles is 30 nm. 

nanoparticles; barium ferrite; nonaqueous; thermolysis; precursor