Monitoring the Bi/Fe ratio at different pH values in BiFeO3 nanoparticles derived by normal and reverse chemical co-precipitation: A comparative study on the purity, microstructure and magnetic properties

2018 ◽  
Vol 44 (5) ◽  
pp. 5109-5115 ◽  
Author(s):  
H. Sangian ◽  
O. Mirzaee ◽  
M. Tajally ◽  
S.A.N.H. Lavasani
Keyword(s):  
Magnetic Properties ◽  
Comparative Study ◽  
Bifeo3 Nanoparticles ◽  
Ph Values ◽  
Co Precipitation ◽  
Microstructure And Magnetic Properties

Effect of Heat Treatment on Microstructure and Magnetic Properties of Strontium Hexaferrite Nanoparticles Prepared in Presence of Non-Ionic Surfactant

2013 ◽  
Vol 202 ◽  
pp. 193-205
Author(s):  
Nital R. Panchal ◽  
Rajshree B. Jotania
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Tween 80 ◽  
Strontium Hexaferrite ◽  
Ionic Surfactant ◽  
Treatment Conditions ◽  
Heat Treated ◽  
Higher Temperature ◽  
Co Precipitation ◽  
Microstructure And Magnetic Properties

SrFe12O19 hexaferrite particles containing polyoxyethelene (20) sorbitan monolate (Tween-80) were synthesized by a chemical co-precipitation technique with a precipitator NH3.H2O. The prepared Sr-M hexaferrite precipitates were heat treated at various temperatures 650 oC, 750 oC, 850 oC, 950oC and 1100oC for 4 hrs in a muffle furnace. The obtained Sr-M powders were characterized by using various instrumental techniques, like FTIR, TGA, XRD, SEM, VSM and Mössbauer spectroscopy. Their physical as well as Magnetic properties were compared. It was observed from XRD results that heat treatment conditions play significant role in the formation of pure SrFe12O19 hexaferrite phase and also in the grain size. The estimated particle size is of the order of nanometer when suitable calcination temperature is applied. SEM micrographs show an increase in crystallite size of the resultant SrFe12O19 hexaferrite particles sintered at higher temperature (1100 oC). Mössbauer spectroscopic measurements were carried out at room temperature. Mössbauer analysis indicates the presence Fe3+ ions in the prepared strontium hexaferrite particles.

A comparative study on the magnetic properties of Fe-doped CuO nanopowders prepared by sol–gel and co-precipitation method

2010 ◽  
Vol 64 (2) ◽  
pp. 192-194 ◽  
Author(s):  
K.L. Liu ◽  
S.L. Yuan ◽  
H.N. Duan ◽  
S.Y. Yin ◽  
Z.M. Tian ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Comparative Study ◽  
Sol Gel ◽  
Precipitation Method ◽  
Co Precipitation ◽  
Cuo Nanopowders
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