Results 161 to 170 of about 2,555 (212)

Mechanical properties of barium hexaferrites

IEEE Transactions on Magnetics, 1979
The mechanical properties of typical isotropic barium ferrites have been determined. A statistical analysis has shown that fracture toughness is the best quality parameter. It changes with variation of production operation conditions. The fracture statistics follows the Weibull distribution. A relationship is found between the influence of the Fe 2 O 3
CAVALLOTI P, ROBERTI, Roberto, CARTOCETI A, SCANSETTI F.   +3 more
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Hydrothermal synthesis of barium hexaferrite

High Pressure Research, 2001
Abstract The authors of the report carried out synthesis of barium hexaferrite (BHF) both in water vapor atmosphere and in liquid medium in the temperature range 200-400°C at pressures PH2O of 9-26MPa in laboratory autoclaves. The results of research have shown that BHF with the best performances can be obtained by thermovaporous treatment of dry ...
M. N. Danchevskaya, Yu. D. Ivakin, L. F. Martynova, G. P. Muravieva   +3 more
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Magnetic properties of barium hexaferrite powders

Journal of Magnetism and Magnetic Materials, 1994
Abstract In this paper, the magnetic properties of unsubstituted and substituted barium hexaferrite powders are examined. The powders were prepared by the glass crystallization method and characterized geometrically by electron microscopy, and magnetically by measurements of remanence curves.
M. El-Hilo, H. Pfeiffer, K. O'Grady, W. Schüppel, E. Sinn, P. Görnert, M. Rösler, D.P.E. Dickson, R.W. Chantrell   +8 more
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Multiferroic properties of polycrystalline barium hexaferrite

Inorganic Materials, 2015
We have examined the feasibility of obtaining polycrystalline barium hexaferrite with multiferroic properties. It has been shown that doping with boron trioxide ensures the formation of a fine-grained structure with high-resistivity nonmagnetic layers between the grains.
V. G. Kostishin, V. G. Andreev, A. V. Timofeev   +2 more
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Improved Synthesis Methods for Barium Hexaferrite

Advanced Materials Research, 2011
BaFe12-2xMnxSnxO19 was synthesized by an improved co-precipitation method. Scanning electron microscopy images were characterised. The synthesis efficiency is discussed from the structure fundaments.
Ying Liu, Hong Sheng Yin, Yue Liu, Kun Sun, Yang Li, Li Li Wang, Wen Juan Xu   +6 more
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Surface effects in barium hexaferrite nanoparticles

Journal of Magnetism and Magnetic Materials, 1999
Abstract Two BaFe 10.4 Co 0.8 Ti 0.8 O 19 samples of 45 and 7.6 nm mean particle diameter were studied. Static magnetic properties and low-field relaxation measurements indicate the presence of high-energy barriers in the nanometric powder, which cannot be associated with the intrinsic anisotropy.
M. García del Muro, X. Batlle, A. Labarta   +2 more
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Barium hexaferrite (M-phase) exhibiting superstructure

Materials Research Bulletin, 1984
Abstract Barium hexaferrite (M-phase) prepared by the flux method is found to exhibit a √3 a × √3 a superstructure similar to barium hexaaluminate.
Ganapathia, L, Gopalakrishnan, J, Rao, CNR   +2 more
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Barium Hexaferrite Prepared by Hydrothermal Synthesis

Materials Science Forum, 2007
Nanoparticles of barium hexaferrite were prepared by controlled hydrothermal synthesis at 280oC. During the synthesis, the composition of the precursor and the suspension concentration were controlled. The as-synthesized crystalline barium hexaferrite platelets of about 50 nm in length and 5 nm in thickness exhibited a saturation magnetization of 40 ...
Miha Drofenik, M. Kristl, Andrej Žnidaršić, Darja Lisjak   +3 more
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GeMn-substituted barium hexaferrite

2002 3rd International Conference on Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002., 2003
The microwave properties have been studied on polycrystalline hexaferrite BaZn/sub 2/(GeMn)/sub 0.2/Fe/sub 15.6/O/sub 27/. The X-ray diffraction has shown that the W-type hexaferrites BaZn/sub 2/(GeMn)/sub x/Fe/sub 16-2x/O/sub 27/ can not be formed at x/spl ges/0.5.
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Remanence properties of barium hexaferrite

Journal of Alloys and Compounds, 2004
Abstract Barium hexaferrites have been widely used as permanent magnets, however one of the most important parameters that characterizes these ferrites is the switching field distribution (SFD). This work calculates the SFD on a small particle barium ferrite (BaFe 12 O 19 ) obtained by coprecipitation from chlorides in an alkaline medium using the ...
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