Results 61 to 70 of about 161 (97)
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Additive Manufacturing With Strontium Hexaferrite-Photoresist Composite
IEEE Transactions on Magnetics, 2023Millimeter wave components, such as circulators and isolators, frequently use magnetic fields to break symmetry of the signal propagation and provide unidirectional signal transmission. While effective, these components have not seen the level of miniaturization of other millimeter wave components, primarily due to the discrete nature of the magnets ...
Max Ho +6 more
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Kinetics of Strontium Hexaferrite Formation
Transactions of the Indian Ceramic Society, 1981Kinetics of strontium hexaferrite (SrO. 6Fe2O3) formation from SrCO3 and Fe2O3 under isothermal conditions were studied by quantitative X-ray diffractometry at reaction temperatures of 745°, 895°, 950°, 984° and 1050°C for various reaction times from 2 minutes to 30 hours. At 745°C, two intermediates, 2SrO.
I. K. Naik, A. R. Das
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Crystal structure of strontium hexaferrite SrFe12O19
Journal of Solid State Chemistry, 1988The room temperature structure of SrFe/sub 12/O/sub 19/ hexagonal ferrite has been refined from X-ray single-crystal data. Structural isomorphism of the title compound with the hexagonal ferrite BaFe/sub 12/O/sub 19/ has been demonstrated. In particular, it is corroborated that the bipyramidal Fe ions have a fast diffusional motion within a ...
X. Obradors +6 more
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Fine‐grained erbium‐doped strontium hexaferrite
physica status solidi (a), 2006AbstractIn the present work the Er‐substituted Sr hexaferrite, SrFe12–x Erx O19, prepared by sol–gel self combustion and subsequent heat treatments, is investigated. The combusted powders were annealed at 800, 900 and 1000 °C for 5, 10, 20, 40, 80, 160 and 320 min. The influence of annealing temperature and time on the structure and magnetic properties
N. Rezlescu +3 more
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Milling Duration Influence on Strontium Hexaferrite Technological Characteristics
Defect and Diffusion Forum, 2021Fine powders of strontium hexaferrite are widely used in powder metallurgy for the production of permanent magnets resistant to atmospheric oxygen and high working temperatures. Obtaining powders with predefined technological characteristics in minimal time and with minimal energy consumption is an actual problem of powder metallurgy.
Ivan N. Egorov +2 more
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Preparation and Characterization of Coprecipitated Strontium Hexaferrite
Transactions of the Indian Ceramic Society, 1989Strontium hexaferrite was prepared from coprecipitated strontium iron complex obtained from metal chloride solutions in the presence of ammonium carbonate. Coprecipitation parameters were varied in the ranges pH 7.5–10, dilution 0.001–0.5 moles Fe in solution and Fe/Sr ratio 11–25.
J. Mallikarjuna, A. R. Das
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Magnetic behaviour of Neodymium-substituted strontium hexaferrite
Applied Physics A, 2016Neodymium-substituted strontium hexaferrites, Sr1−x Nd x Fe12O19 (x = 0, 0.05, 0.10, 0.15, 0.20), have been successfully synthesized by using citrate precursor method. The synthesized samples were characterized by X-ray diffraction, Transmission electron microscopy and vibrating sample ...
Bilal Hamid Bhat, Basharat Want
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Silica coated hard-magnetic strontium hexaferrite nanoparticles
Advanced Powder Technology, 2019Abstract Stable colloids of hard magnetic particles are newly developed and very promising materials. Surface functionalization of these particles remains challenging because the particles tend to aggregate during reaction due to strong magnetic interactions.
Evgeny O. Anokhin +9 more
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Effect of bismuth substitution in strontium hexaferrite
AIP Conference Proceedings, 2018Bismuth (Bi) substituted M-type strontium hexaferrite (Sr1-xBix Fe12O19, x=0 and 0.02) are synthesized by sol-gel auto combustion method. Powder X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) shows increase in lattice parameter and particle size (500 nm to 3 micron) respectively, for Bi substituted sample. Magnetization
M. R. Sahoo +4 more
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Domain structures in barium and strontium hexaferrites
Soviet Physics Journal, 1966Powder 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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