Results 181 to 190 of about 161,513 (250)

Effect of zinc substitution on U-type barium hexaferrite-epoxy composites as designed for microwave absorbing applications

, 2021
In the current study, U-type barium hexaferrite (BHF) poly-crystalline powder with chemical formula Ba4Co2−xZnxFe36O60 (0.5 ≤ x ≤ 1.5 in step of 0.5) were successfully synthesized by solid state reaction route at the sintering temperature of 1400 °C in ...
V. Pratap, A. Soni, S. M. Abbas, Azher M. Siddiqui, N. Prasad   +4 more
semanticscholar   +1 more source

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 ...
openaire   +1 more source

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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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
openaire   +1 more source

Understanding the phase evolution with temperature in pure (BaFe12O19) and zinc-zirconium co-doped barium hexaferrite (BaZnZrFe10O19) samples using Pawley and Rietveld analysis

, 2021
Structural changes\evolution taking place in ferrites with doping and increasing processing temperature are crucial from their performance point of view.
S. Verma, Aanchal Chawla, Ishita Pushkarna, Anupinder Singh, S. Godara, D. Pathak, Rajesh Kumar, Mandeep Singh   +7 more
semanticscholar   +1 more source

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.
openaire   +1 more source

The low-temperature formation of barium hexaferrites

Journal of the European Ceramic Society, 2006
Abstract We have investigated the formation of barium hexaferrites with the compositions BaFe 12 O 19 and Ba 2 Co 2 Fe 12 O 22 using precipitation in ethanol. A mechanism for the formation was proposed, based on the results of thermal analysis, X-ray powder diffraction, electron microscopy and the magnetic properties of powders prepared under ...
Darja Lisjak, Miha Drofenik
openaire   +1 more source

Synthesis of barium hexaferrite by pyrolysis of an aerosol

Journal of Materials Research, 1994
Polycrystalline BaFe12O19 has been synthesized by pyrolysis of an aerosol produced by ultrahigh frequency spraying of a solution. Two precursor solutions have been used in order to study its influence on the formation temperature of the barium hexaferrite and on the microstructural and magnetic properties.
M.V. Cabañas, J.M. González-Calbet, M. Vallet-Regí   +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
openaire   +1 more source

An investigation on the microwave absorption properties of Co–Al–Ti substituted barium hexaferrite-MWCNT nanocomposites

, 2021
The microwave absorption properties of Co-Al-Ti substituted barium hexaferrite-multiwalled carbon nanotubes (MWCNTs)-epoxy resin nanocomposites are thoroughly investigated in the frequency range of 1-18 GHz. The Nanoparticles with the chemical formula Ba
M. Rostami, Motahareh Jafarpour, M. H. Majles Ara   +2 more
semanticscholar   +1 more source