Synthesis and characterization of SrFe12O19 powder obtained by hydrothermal process

Jean, M.; Nachbaur, Virginie; Bran, Julien; Breton, Jean‐Marie Le

doi:10.1016/j.jallcom.2010.02.002

Cited by 164 publications

(71 citation statements)

References 24 publications

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“…The presence of strontium carbonate is due to the reaction between sodium hydroxide and the carbon dioxide present in ambient air [21]. The large band at 1474 cm −1 and the narrow band at 890 cm −1 can be assigned to carbonate groups [4]. In consistent with the XRD results, it can be concluded that the FTIR results correspond to the both SrCO 3 and Sr(NO 3 ) 2 compounds.…”

Section: Ft-ir Analysissupporting

confidence: 70%

“…Among these M-type hard magnets, strontium hexaferrite is a hard magnet and has reasonable magnetic performances. It has been widely used in telecommunication, magnetic recording media, magnetooptics, and microwave devices [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Hessien et al [1] have synthesized the SrFe 12 O 19 nanoparticles from the natural product. Jean et al [4] synthesized SrFe 12 O 19 nanoparticles hydrothermally accompanied by calcination.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrothermal Synthesis of SrFe12O19 and Its Characterization

Baykal

Toprak

Durmuș

et al. 2012

J Supercond Nov Magn

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We have synthesized strontium hexaferrite particles in an alkaline medium using a hydrothermal process at 180°C. Crystalline phase of samples were determined by XRD and spectroscopic, morphological, and magnetic investigation of the sample were FT-IR, SEM, and TG analysis, respectively. XRD analysis revealed few impurity phases in the as-made powder; upon calcinations, the material is converted to desired hexaferrite phase. As synthesized powder exhibits agglomerates with rather smooth facets, in the form of thick platelets. Upon calcination, all these structures were observed to transfer to rod-like structures. The As calcined sample has high specific saturation magnetization (M s ) values of 65 emu/g that is close to its theoretical value of 74.3 emu/g but the hydrothermally synthesized sample does not. This is in agreement with the observations from XRD analysis where few impurity phases observed in the as-made powder cause a weak magnetic response. Upon calcination, the material is converted to a desired hexaferrite phase with better magnetic properties.

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Section: Ft-ir Analysissupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

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Hydrothermal Synthesis of SrFe12O19 and Its Characterization

Baykal

Toprak

Durmuș

et al. 2012

J Supercond Nov Magn

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“…The current challenge is to synthesize ferrites with well-controlled shape and size, fine morphology, uniform composition, and desired magnetic properties at lower sintering temperatures. As these properties are a strong function of synthetic methodology, a variety of methods have been exploited extensively and each one yields different magnetic properties [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Sol-gel auto-combustion method in the presence of a complexing agent has aroused special interest because of the utilization of the heat released from the oxidation reaction of the hydrocarbon species used in reaction to lower the formation temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fuel on the Synthesis, Structural, and Magnetic Properties of M-Type Hexagonal SrFe12O19 Nanoparticles

Chawla

Kaur

Mudsainiyan

et al. 2014

J Supercond Nov Magn

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The aim of this work is to compare the formation temperatures, structural, and macroscopic magnetic properties of Sr-hexaferrite (SrM) in the presence of different fuels. In this research, SrM powder was synthesized by a sol-gel auto-combustion route using different hydroxycarboxylic acids: citric acid, tartaric acid, sucrose (gluconic acid), and lactic acid. Completion of reaction was followed by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The obtained powders were further characterized by thermal gravimetric analysis-differential thermal analysis (TGA-DTA), energydispersive spectroscopy (EDS), and scanning electron microscopy (SEM). Their magnetic properties were studied using Mössbauer spectroscopy and magnetic measurements were done by vibrating sample magnetometer (VSM). The influence of different fuels was reflected on the formation temperature, phase purity, and morphology of crystallites as well as on their magnetic properties. The results show the finest crystallite size has been obtained as 27.85 nm (from XRD) in the case of sucrose sample. The lowest

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“…Hexagonal ferrites are prepared by various synthesis routes such as solid-state reaction, 17 mechanical alloying, 18 coprecipitation and hydrothermal method, [19][20][21] sol-gel, 22 etc. The method of preparation strongly determines the structural and magnetic properties of hexaferrites.…”

Section: Introductionmentioning

confidence: 99%

Structural, Magnetic, and Electrical Properties of Microwave-Sintered Cr3+-Doped Sr Hexaferrites

Praveena

Bououdina

Reddy

et al. 2014

Journal of Elec Materi

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SrCr x Fe 12Àx O 19 (x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9) hexaferrites were prepared by a microwave-hydrothermal method and subsequently sintered at 950°C for 90 min using the microwave sintering method. The results show that, with increasing Cr 3+ content, the lattice parameters changed anisotropically. The average grain sizes of sintered samples were in the range of 280 nm to 660 nm. The saturation magnetization systematically decreased with increasing Cr 3+ doping, but the coercivity values increased. The electrical resistivity (log q) decreased linearly with increasing temperature up to a certain temperature known as the transition temperature (T c ), and T c decreased with further increase (x > 0.5) of the Cr 3+ content. This decrease in log q and the activation energy (E g ) is due to electron hopping and occupancy of doped ions at different lattice sites. We found that the dielectric constant and dielectric loss for all the samples decreased with the Cr 3+ content. The structural, magnetic, and electrical properties of Cr 3+ -doped SrFe 12 O 19 hexaferrites have thus been investigated.

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Synthesis and characterization of SrFe12O19 powder obtained by hydrothermal process

Cited by 164 publications

References 24 publications

Hydrothermal Synthesis of SrFe12O19 and Its Characterization

Hydrothermal Synthesis of SrFe12O19 and Its Characterization

Effect of Fuel on the Synthesis, Structural, and Magnetic Properties of M-Type Hexagonal SrFe12O19 Nanoparticles

Structural, Magnetic, and Electrical Properties of Microwave-Sintered Cr3+-Doped Sr Hexaferrites

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