Hexaferrite particles prepared by sol-gel technique

Sürig, C.; Hempel, K. A.; Bonnenberg, D.

doi:10.1109/20.333999

Cited by 98 publications

(35 citation statements)

References 8 publications

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“…The solid state reaction method has some inherent disadvantages: such as chemical inhomogeneity, coarser particle size, and introduction of impurities during ball milling. Chemical methods such as coprecipitation [3], glass crystallization [4], self propagating high temperature synthesis method [5], hydrothermal synthesis method [6], mechanical alloying [7], and sol-gel method [8] have been employed to synthesise strontium ferrite.…”

Section: Introductionmentioning

confidence: 99%

Fe/Sr ratio effect on magnetic properties of strontium ferrite powders synthesized by microwave-induced combustion process

Lin

2005

Journal of Alloys and Compounds

105

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Section: Introductionmentioning

confidence: 99%

Fe/Sr ratio effect on magnetic properties of strontium ferrite powders synthesized by microwave-induced combustion process

Lin

2005

Journal of Alloys and Compounds

105

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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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“…Furthermore, the milling process to reduce the particle size, generally yields nonhomogeneous mixtures on a microscopic scale and induces lattice strains in the material [1]. In order to improve the material properties, non-conventional routes such as coprecipitation [2], hydrothermal [3], sol-gel [4,5] and citrate precursor methods [6] have also been developed.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of barium hexaferrite nanocrystalline powders prepared by a sol-gel combustion method using inorganic agent

Ataie

Mali

2007

J Electroceram

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Nanocrystalline particles of barium hexaferrite were synthesized by a sol-gel combustion route using nitrate-citrate gels prepared from metal nitrates and citric acid solutions under various Fe/Ba molar ratios of 10, 11 and 12. Sodium hydroxide was used as a pH-adjusting agent. The results revealed that the formation temperature of barium hexaferrite is influenced by Fe/Ba molar ratio; the Fe/Ba molar ratio of 12 is more favorable. For sample synthesized with a Fe/Ba molar ratio of 12, barium hexaferrite started to form at 800°C and fully formed at 1000°C. The results also showed that the coercivity of the samples decreases as the Fe/Ba molar ratio increases from 10 to 12, whilst the saturation magnetization increases.

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Hexaferrite particles prepared by sol-gel technique

Cited by 98 publications

References 8 publications

Fe/Sr ratio effect on magnetic properties of strontium ferrite powders synthesized by microwave-induced combustion process

Fe/Sr ratio effect on magnetic properties of strontium ferrite powders synthesized by microwave-induced combustion process

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

Characteristics of barium hexaferrite nanocrystalline powders prepared by a sol-gel combustion method using inorganic agent

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