— Magnetic properties of Ba-ferrite processed by a novel method: surfactant assisted low energy ball milling, are discussed. By using cationic and anionic surfactants …
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46 4.2 Experimental 4.2.1 Materials Synthesis Coating of the ball-milled barium ferrite (A rnold Engineering) particles with silica was achieved using the Stöber method [Stöbe …
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— BaFe 12 O 19, also known as barium hexaferrite (BHF), is a magnetic compound that became increasingly popular in numerous fields of science due to its unique set of characteristics.One of the key advantages of barium hexaferrite is that its properties can be easily tuned through the use of doping, synthesis techniques, and heat treatment …
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Our purpose here is to explore such effects further with room temperature low energy ball milling of barium ferrite with surfactants in water. Pure water produces nothing of exceptional interest. ... W.A.Kaczmarek, R.Bramley, …
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— In this research a mixture of barium ferrite and graphite powders was milled in a planetary ball mill and then heat treated in vacuum to produce BaFe12O19/Fe3O4 and Fe/Fe3O4 magnetic nano-composites.
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— The effects of dry-milling BaFe12O19 in air for periods of 190, 360, 590, 690 and 1000 h have been investigated by X-ray diffraction and Möss effect …
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— During room-temperature ball milling in aqueous dispersions a process of fast decomposition can be observed. For a cationic surfactant at pH 10 the milling terminates …
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DOI: 10.1016/0254-0584(94)01450-U Corpus ID: 97371029; Surfactant-assisted ball milling of BaFe12O19 ferrite dispersion @article{Kaczmarek1995SurfactantassistedBM ...
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— Fig. 1 shows the XRD patterns for barium ferrite which is milled with carbon black with different C:O molar ratios. It can be concluded from Fig. 1 that carbon black has partially reduced barium ferrite in the milling medium. Fe 2 O 3 has been reduced to Fe 3 O 4 and BaFe 12 O 19 /Fe 3 O 4 nanocomposite has been formed. For the sample with …
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— @article{osti_22476052, title = {Role of intensive milling in the processing of barium ferrite/magnetite/iron hybrid magnetic nano-composites via partial reduction of barium ferrite}, author = {Molaei, M.J., E-mail: [email protected] and Delft Chem Tech, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, 2628 BL …
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Match case Limit results 1 per page. 742 IEEE TRANSACTIONS ON MAGNETICS, VOL. 30, NO. 2, MARCH 1994 Surfactant Assisted Ball-Milling of Barium Ferrite S.J. Campbell*, W.A. Kaczmarek+, E. Wu* and K.D. Jayasunya* * Department of Physics, University College, The University of New South Wales Australian Defence Force Academy, …
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The effects of dry-milling BaFe12O19 in air for periods of 190, 360, 590, 690 and 1000 h have been investigated by X-ray diffraction and Möss effect measurements. The sizes of the BaFe12O19 particles decrease on milling, as expected, although a partial decomposition of BaFe12O19 to α-Fe2O3 is found to take place on extended milling …
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— Barium hexaferrite nanofluids based on five different solvents have been prepared by employing Pulsed Laser Ablation in Liquid (PLAL) at two different wavelengths of 532 nm and 1064 nm. ... Nuevo León, Mexico ... It is found that different liquid environments lead to the formation of barium ferrite nanoparticles with different particle ...
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The effects of wet-milling barium ferrite in the presence of cationic or anionic surface active substances have been investigated by X-ray diffraction and Moss spectroscopy measurements. Evidence for superparamagnetic relaxation of fine particles, both in the surfactant assisted ball-milled samples and in samples dry-milled in air is ...
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— For a cationic surfactant at pH 10 the milling terminates in BaCO 3 and magnetite Fe 3 O 4 as main phases and the material remains magnetic. In the case of anionic surfactant type and the same pH value, the barium ferrite structure remains as the main phase, because surfactants do not absorb onto the oxide surface.
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— M-type barium ferrite has the chemical formula BaFe 12 O 19 and a hexagonally symmetric crystal structure with the space group P63/mmc that consists of 64 ions and ... is simple, provides good fillability, and is a common method for the preparation of powder, in which high-energy ball milling can make the material undergo high-speed …
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Brief review on magnetic properties of nanoferrites. Y.S. Vidya, ... B. Chinnappareddy, in Inorganic Chemistry Communications, 2023 1.7 Barium ferrite. Barium ferrite (BaFO), is an important ceramic hard magnetic material with high coercive force, large saturation magnetization, good chemical stability, and corrosion resistive [116].All these properties …
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The method involved wet-grinding ferrites in a ball mill in the presence of a suitable surfactant until the ferrite is in a colloidal state. Centrifugation was usually employed to remove larger particles, which could lead to agglomeration and sedimentation. Many other workers subsequently studied and used this method.
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The structural and magnetic behaviour of BaFe12O19 subjected to milling in vacuum for 1000 h has been investigated by x-ray powder diffraction and Möss effect spectroscopy techniques. Pronounced structural disorder is obtained along with partial decomposition of BaFe12O19 to α-Fe2O3 and evidence for superparamagnetic …
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— The M-type hexagonal barium ferrite powder was obtained after the calcination of precursor, which was prepared with self-propagating high-temperature synthesis. Using high-energy ball milling, the powder size was turned into nanoscale.X-ray diffraction (XRD), transmission electron microscope (TEM) and vector network analyzer were used to …
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— Fig. 1 is XRD patterns of precursor, calcined powder and high-energy ball milled particles of barium ferrite. Pattern (a) indicates that the precursor is composed of only γ-Fe 2 O 3 and BaCO 3.It is a precondition to form hexagonal barium ferrite. After calcination, hexagonal barium ferrite has formed successfully, which can be seen from …
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— Ferrimagnetic - antiferromagnetic (AFM) composites have been synthesised by means of ball milling strontium hexaferrite (SrFe 12O 19) with iron sulphide (Fe xS 1-x), (where Fe xS 1-x is weakly ...
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barium ferrite ball milled in surfactant tomspl In this research a mixture of barium ferrite and graphite powders was milled in a planetary ball mill and then
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— For a cationic surfactant at pH 10 the milling terminates in BaCO 3 and magnetite Fe 3 O 4 as main phases and the material remains magnetic. In the case of …
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The effects of wet-milling barium ferrite in the presence of cationic or anionic surface active substances have been investigated by X-ray diffraction and Moss spectroscopy …
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The effects of dry-milling BaFe 12 O 19 in air for periods of 190, 360, 590, 690 and 1000 h have been investigated by X-ray diffraction and Möss effect measurements. The sizes of the BaFe 12 O 19 particles decrease on milling, as expected, although a partial decomposition of BaFe 12 O 19 > to α-Fe2O3 is found to …
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The structural and magnetic behaviour of BaFe12O19 subjected to milling in vacuum for 1000 h has been investigated by x-ray powder diffraction and Möss effect …
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— Increasing the milling time to 20 h has resulted in formation of magnetite. It seems that Fe 3 O 4 has formed as a result of partial reduction of barium ferrite. Further milling up to 40 h results in increasing relative content of the Fe 3 O 4. Mean crystallite size of barium ferrite for 20- and 40-h milled samples is 17 and 13 nm, respectively.
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