Magnetic properties of La-Zn substituted Sr-hexaferrites by self-propagation high-temperature synthesis

You, Lishun; Qiao, Liang; Zheng, Jingwu; Jiang, Meiyan; Jiang, Liqiang; Sheng, Jiawei

doi:10.1016/s1002-0721(08)60042-3

Cited by 41 publications

(15 citation statements)

References 11 publications

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“…Compared with traditional calcination [16], the microwave calcination changes the calcination temperature and time significantly by lowering 300 • C and shortening 30 min. Figure 3 shows the morphology of SrFe 11 …”

Section: Resultsmentioning

confidence: 99%

“…The magnetization of strontium hexaferrite derives from the uncompleted offset of magnetic moment of Fe 3+ in different sublattices. The Co 2+ [8], Al 3+ [5], Cr 3+ [9], Pb 3+ [10], Zr-Zn [11], Nd-Co [12], and La-Al [13] substitution has caused various changes in the magnetic properties. In addition, the process of calcination has great relationship with the magnetic properties.…”

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confidence: 99%

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Preparation and Magnetic Properties of Nd–Co-Substituted M-Type Strontium Ferrite by Microwave-Assisted Synthesis Method

Wang

et al. 2015

J Supercond Nov Magn

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M-strontium hexaferrites (Sr 1−x Nd x Fe y Co 1−y O 19 ) with the substitution of Co 2+ and Nd 3+ were prepared by the microwave-assisted solid-phase reaction process. Mstrontium hexaferrite with magnetoplumbite structure can be formed at 950 • C for 90 min by applying microwaveassisted calcination. For Co 2+ -substituted M-strontium ferrites, the saturation magnetization (σ s ) and remanent magnetization (σ r ) tend to decrease with the increasing calcination temperature, accompanying by the improvement of coercivity for the enhancement of morphology anisotropy. For Nd-Co-co-substituted strontium ferrites, the appearance of α-Fe 2 O 3 phase and the conversion of Fe 3+ (5 μB) into Fe 2+ (4 μB) decrease the net magnetic moment, resulting in the dilution of the σ s and σ r . The coercivity of NdCo-co-substituted strontium ferrite increases slightly for the improvement of magnetocrystalline anisotropy, which could be attributed to the enhancement of anisotropy field for the substitution of Fe 3+ ions by Co 2+ ions and the formation of grains with plate-like shape.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Preparation and Magnetic Properties of Nd–Co-Substituted M-Type Strontium Ferrite by Microwave-Assisted Synthesis Method

Wang

et al. 2015

J Supercond Nov Magn

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“…A variety of techniques have been used to prepare strontium ferrite (SrFe 12 O 19 ) of nano-scale including co-precipitation method [6][7][8][9][10], sol-gel process [11][12][13], glass crystallization [14], the mechanical alloying method [15][16][17], self-propagation [18,19], microemulsion [20], microwave [21][22][23], hydrothermal [24] and ultrasound-assisted synthesis [25]. Among them, the coprecipitation is one of the conventional and inexpensive methods to synthesize the strontium ferrite.…”

Section: Introductionmentioning

confidence: 99%

Influence of surfactants on co-precipitation synthesis of strontium ferrite

Lü

Hong

2011

Journal of Alloys and Compounds

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“…In addition, development of wireless and radar electronics needs low loss magnetic microwave devices and barium ferrite is a suitable candidate for microwave device applications [1][2][3][4][5][6]. There have been attempts for production of nanoparticles of barium ferrite in recent years using methods such as solgel [7,8], microwave-assisted sol-gel auto-combustion [9], auto-combustion [10], hydrothermal [11], co-precipitation [12], self-propagation high-temperature synthesis [13], carbon combustion [14], spray pyrolysis [15], aerosol [16] and molten salt [17].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Effects of Milling Atmosphere on Synthesis of Barium Ferrite/Magnetite Nanocomposite

Molaei

Ataie

Raygan

et al. 2011

J Supercond Nov Magn

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In this research, barium ferrite /magnetite nanocomposites synthesized via a mechano-chemical route. Graphite was used in order to reduce hematite content of barium ferrite to magnetite to produce a magnetic nanocomposite. The effects of processing conditions on the powder characteristics were investigated by XRD, VSM, and HRTEM techniques. XRD results revealed that milling under air and argon atmospheres resulted in the appearance of Fe 3 O 4 peaks beside BaFe 12 O 19 peaks after 15 and 20 hrs milling, respectively. The intensity of Fe 3 O 4 peaks in the XRD patterns increased by increasing the milling time. VSM studies revealed that saturation magnetization of the 40-hrs milled samples under air and argon atmospheres was 31.25 and 36.42 emu/g, respectively. This difference might be due to more Fe 3 O 4 content in the latter sample. By annealing of the 40-hrs milled sample in air, saturation magnetization increased to 139.12 emu/g.

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Magnetic properties of La-Zn substituted Sr-hexaferrites by self-propagation high-temperature synthesis

Cited by 41 publications

References 11 publications

Preparation and Magnetic Properties of Nd–Co-Substituted M-Type Strontium Ferrite by Microwave-Assisted Synthesis Method

Preparation and Magnetic Properties of Nd–Co-Substituted M-Type Strontium Ferrite by Microwave-Assisted Synthesis Method

Influence of surfactants on co-precipitation synthesis of strontium ferrite

Investigation on the Effects of Milling Atmosphere on Synthesis of Barium Ferrite/Magnetite Nanocomposite

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