Co-precipitation of a Ni–Zn ferrite precursor powder: Effects of heat treatment conditions and deagglomeration on the structure and magnetic properties

2012 ◽  
Vol 32 (10) ◽  
pp. 2469-2476 ◽  
Author(s):  
Susana M. Olhero ◽  
Das Soma ◽  
Vitor S. Amaral ◽  
Tim W. Button ◽  
Fernando J. Alves ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Precursor Powder ◽  
Treatment Conditions ◽  
Zn Ferrite ◽  
Co Precipitation

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.

Heat-treatment conditions as a factor in the magnetic properties of polyacrylonitrile carbon fibre

1976 ◽  
Vol 8 (3) ◽  
pp. 259-261
Author(s):  
P. A. Pshenichkin ◽  
T. N. Shashkova ◽  
V. M. Martynov ◽  
L. S. Tyan ◽  
V. S. Samoilov ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Carbon Fibre ◽  
Treatment Conditions

Effects of Heat Treatment Conditions on Magnetic Properties and Structural Features of Nanocrystalline Fe79Zr10N11 Films

2009 ◽  
Vol 152-153 ◽  
pp. 70-74 ◽  
Author(s):  
E.N. Sheftel ◽  
Rauf S. Iskhakov ◽  
S.V. Komogortsev ◽  
P.K. Sidorenko ◽  
Nikolai S. Perov
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Structural Features ◽  
Soft Magnetic ◽  
Exchange Correlation ◽  
Calculation Technique ◽  
Treatment Conditions ◽  
Random Magnetic Anisotropy ◽  
Anisotropy Model

Data on the random magnetic anisotropy and exchange correlation length in soft magnetic nanocrystalline Fe79Zr10N11 films were obtained using a calculation technique in frame of the random magnetic anisotropy model. The calculations are performed using approach magnetization to saturation curves. The local magnetic anisotropy fields (Ha), and magnetic anisotropy correlation radii (Rс) reduced to =(A/K)1/2 were determined for the films annealed at 475 and 6000 C for 0.5, 1, 2, and 3 h. The correlation Hc ~(Rc/)3 for the all annealed films was found.

Effects of heat treatment conditions on the structural and magnetic properties of MgCuZn nano ferrite

2012 ◽  
Vol 38 (7) ◽  
pp. 5813-5820 ◽  
Author(s):  
Ch. Sujatha ◽  
K. Venugopal Reddy ◽  
K. Sowri Babu ◽  
A. RamaChandra Reddy ◽  
K.H. Rao
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Treatment Conditions ◽  
Structural And Magnetic Properties

Dependence of the magnetic properties of steels Ni32Cr10 and Ni32Cr12 on heat-treatment conditions

1968 ◽  
Vol 11 (4) ◽  
pp. 54-57
Author(s):  
B. P. Khromov ◽  
G. N. Dement'ev ◽  
G. A. Buzunov
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Treatment Conditions

Impact of the heat treatment conditions on crystal structure, morphology and magnetic properties evolution in BaM nanohexaferrites

2021 ◽  
Vol 866 ◽  
pp. 158961 ◽  
Author(s):  
A.V. Trukhanov ◽  
K.A. Darwish ◽  
M.M. Salem ◽  
O.M. Hemeda ◽  
M.I. Abdel Ati ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Heat Treatment ◽  
Magnetic Properties ◽  
Treatment Conditions ◽  
Structure Morphology
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