TY - JOUR
T1 - Sonochemical approach to the preparation of barium hexaferrite nanoparticles
AU - Shafi, K. V.P.M.
AU - Gedanken, A.
PY - 1999
Y1 - 1999
N2 - A new method, via. the sonochemical decomposition of the solutions of organic precursors, for the synthesis of nanostructured crystalline single phase BaFe12O19 particles is proposed. Nanosized amorphous precursor powders for BaFe12O19, were prepared by the sonochemical decomposition of the solutions of Fe(CO)5 and Ba[OOCCH(C2H5)C4H9]2 in decane, under air at 273 K. The amorphous nature of these particles was confirmed by various techniques, such as SEM, TEM, SAED, and XRD, and the magnetic measurements indicated the superparamagnetic nature. The XRD of the heated sample of this confirmed the formation of single phase BaFe12O19, and the TEM micrograph revealed near uniform platelets with sizes less than 50 nm. The observed magnetization measured upto a field of 1.5 kG of the nanocrystalline BaFe12O19 sample (48 emu g-1) was significantly lower than that for the reported multidomain bulk particles (72 emu g-1), reflecting the ultrafine nature of the sample.
AB - A new method, via. the sonochemical decomposition of the solutions of organic precursors, for the synthesis of nanostructured crystalline single phase BaFe12O19 particles is proposed. Nanosized amorphous precursor powders for BaFe12O19, were prepared by the sonochemical decomposition of the solutions of Fe(CO)5 and Ba[OOCCH(C2H5)C4H9]2 in decane, under air at 273 K. The amorphous nature of these particles was confirmed by various techniques, such as SEM, TEM, SAED, and XRD, and the magnetic measurements indicated the superparamagnetic nature. The XRD of the heated sample of this confirmed the formation of single phase BaFe12O19, and the TEM micrograph revealed near uniform platelets with sizes less than 50 nm. The observed magnetization measured upto a field of 1.5 kG of the nanocrystalline BaFe12O19 sample (48 emu g-1) was significantly lower than that for the reported multidomain bulk particles (72 emu g-1), reflecting the ultrafine nature of the sample.
UR - http://www.scopus.com/inward/record.url?scp=0032593751&partnerID=8YFLogxK
U2 - 10.1016/s0965-9773(99)00060-4
DO - 10.1016/s0965-9773(99)00060-4
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AN - SCOPUS:0032593751
SN - 0965-9773
VL - 12
SP - 29
EP - 34
JO - Nanostructured Materials
JF - Nanostructured Materials
IS - 1
T2 - Proceedings of the 1998 4th International Conference on Nanostructured Materials (NANO '98)
Y2 - 14 June 1998 through 19 June 1998
ER -