Synthesis and characterization of nano crystalline BaFe{sub 12}O{sub 19} powders by low temperature combustion

Journal Article · Wed Jan 01 04:00:00 EST 2003 · Materials Research Bulletin

DOI:https://doi.org/10.1016/S0025-5408(02)00979-0· OSTI ID:20883135

Jianguo, Huang; Hanrui, Zhuang; Wenlan, Li

Nano crystalline BaFe{sub 12}O{sub 19} powders have been prepared at a relatively low calcination temperature by a gel combustion technique using citric acid as a fuel/reductant and nitrates as oxidants. The effects of processing parameters, such as Ba/Fe ratio, citric acid/nitrates ratio, reaction temperature on the powder characteristics and magnetic properties of the resultant barium ferrites were investigated. By controlling the molar ratio of citric acid to metal nitrates, nano crystalline BaFe{sub 12}O{sub 19} powders with different particle sizes have been obtained. Phase attributes, microstructures and magnetic properties of the powders were characterized using X-ray diffraction analysis, X-ray line-broadening technique, Fourier transform infrared spectroscopy measurements, transmission electron microscopy and vibrating sample magnetometer. The maximum saturation magnetization value and intrinsic coercivity value for the obtained barium hexaferrites are 59.36 emu/g and 5540 Oe.

• OSTI ID: 20883135
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 1 Vol. 38; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CALCINATION
CHEMICAL PREPARATION
CITRIC ACID
COERCIVE FORCE
COMBUSTION
FERRITES
FOURIER TRANSFORM SPECTROMETERS
LINE BROADENING
MAGNETIC PROPERTIES
MAGNETIZATION
MICROSTRUCTURE
NANOSTRUCTURES
NITRATES
OXIDIZERS
PARTICLE SIZE
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS
X RADIATION
X-RAY DIFFRACTION