Results 171 to 180 of about 2,555 (212)

Synthesis, structure and properties of barium and barium lead hexaferrite

Journal of Magnetism and Magnetic Materials, 2019
Abstract Barium hexaferrite pellets were prepared by sintering method and single crystal was obtained by flux technique. The thermal expansion coefficients of Ba 0,3 Pb 0,7 Fe 12 O 19 single crystal along a and c axes are 9.9 * 10 –6  K –1 and 17.4 * 10 –6  K –1 . It is in a good agreement with thermal expansion coefficients of pellets. The
Gudkova, S.A., Vinnik, Denis Alexandrovich, Zhivulin, V.E., Chernukha, Alexander, Zherebtsov, Dmitry A., Trofimov, Evgeny, Trukhanov, A.V., Trukhanov, Sergei, Kalandija, M., Semisalova, Anna, Perov, Nikolai Sergeevich, Senin, A.V., Zabeivorota, N.S., Mikhailov, G.G.   +13 more
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Wetting of barium hexaferrite by molten metals

Ceramics International, 1975
Abstract The interaction between molten metals and the sintered magnetic oxide BaFe12O19 has been studied in order to determine its wettability. Pure copper, silver and silver-zinc alloys, insofar as they are very oxygen-active are the metals considered. The pure metals do not wet the ferrite.
Passerone A, Biagini E, Lorenzelli V
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Magnetic Properties of Barium Hexaferrite Compacted Nanopowders

Technical Physics, 2019
The magnetic characteristics of compact BaFe12O19 powders have been studied by magnetic force microscopy and magnetometry methods. Powders have been obtained by a chemical method. Compaction-induced magnetic anisotropy of the “easy magnetic plane” type has been found. The nature of anisotropy has been discussed.
A. V. Timofeev, V. G. Kostishin, D. B. Makeev, D. N. Chitanov   +3 more
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On the implantability of barium hexaferrite magnets

Clinical Materials, 1986
The purpose of this study was to determine the suitability of using small barium hexaferrite magnets in implantable devices for the purpose of locating their exact position beneath the skin. From animal tests it is concluded that such magnets are a good method for locating implants, and that when properly prepared and encapsulated in silicone rubber ...
MD Craggs, PEK Donaldson, P Luthert
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Barium hexaferrite nanoparticles: Synthesis and magnetic properties

Materials Science and Engineering: B, 2011
Abstract Carbon combustion synthesis is applied to rapid and energy efficient fabrication of crystalline barium hexaferrite nanoparticles with the average particle size of 50–100 nm. In this method, the exothermic oxidation of carbon nanoparticles with an average size of 5 nm with a surface area of 80 m 2 /g generates a self-propagating thermal wave ...
K.S. Martirosyan, E. Galstyan, S.M. Hossain, Yi-Ju Wang, D. Litvinov   +4 more
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AC Conducitivity in Bismuth-Substituted Barium Hexaferrites

Journal of the Physical Society of Japan, 1994
Bismuth substituted barium hexaferrites in the composition series BaO·(6- x ) Fe 2 O 3 · x Bi 2 O 3 with 0< x
M. Pal, P. Brahma, D. Chakravorty
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Arsenic removal by magnetic nanocrystalline barium hexaferrite

Journal of Nanoparticle Research, 2012
Nanoscale magnetite (Fe3O4) ( 200 nm assemblies. By using BHF, we demonstrate that nanoparticle removal is more efficient and fixed bed type cartridge applications are more possible.
Patel, HA Patel, Hasmukh A., Byun, J Byun, Jeehye, Yavuz, CT Yavuz, Cafer T.   +2 more
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Impedance matching materials based on barium hexaferrites

Millimetre Wave and Terahertz Sensors and Technology XI, 2018
The results of the study saturation magnetization and crystallographic anisotropy doped with diamagnetic ions of hexagonal ferrites are presented. It is shown that the impedance matching properties of ferrimagnetic fillers depend on equality values of magnetic and dielectric permittivity composite material in the working wave band.
Anton S. Boldyreff, Vasiliy L. Kruchkov, Irina K. Epaneshnikova, Sergey S. Serebryannikov, Anatoliy P. Cherkasov, Sergej V. Serebryannikov, Andrei M. Belevtsev   +6 more
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Magnetic Properties of Topochemically Sintered Barium Hexaferrite

Journal of the American Ceramic Society, 1999
This communication describes the method of topochemical reaction sintering for the production of barium hexaferrite. Topochemical reaction sintering overcomes crucial process steps that are used in the conventional wet magnetic compaction method, such as calcination, wet grinding, and wet magnetic compaction.
Jayaram Laxmanrao Gumaste, Hem Shanker Ray, Mahadev Malhar Godkhindi, Pudkotai Gopalayngar Mukunda   +3 more
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Domain structures in barium and strontium hexaferrites

Soviet Physics Journal, 1966
Powder figures have been used to study the domain structure of monocrystals of barium hexaferrite; the domain boundaries on a side face respond to a magnetic field. The domain structure of strontium hexaferrite is reported; the star structure on the end face has a definite order, and the pattern changes to wavy bands as the thickness of the crystal is ...
A. I. Drokin, S. Sh. Gendelev
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