Low-temperature co-fired Ni–Ti co-substituted barium ferrites

Zhang, Huaiwu; Liu, Yinong; Ma, Guokun; Li, Qiang

doi:10.1177/0021998315571775

Cited by 10 publications

(3 citation statements)

References 27 publications

(28 reference statements)

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“…The excellent properties of BaFe12019 among other are high frequency field, large saturation magnetization and high coercive force [7]. In this research, it is alloyed ceramics of BiFe03 and BaFe12019 together hoping to improve magnetic properties which could improve value of magnetoelectric coupling (related to higher quality of multiferroic materials).…”

Section: Introductionmentioning

confidence: 92%

Improving Magnetic Properties of BiFeO3-BaFe12O19 Solid Solution by Different Sintering Time and Temperatures of Sol-Gel Method

Suastiyanti¹,

Maulida²,

Wijaya³

2019

AJAS

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Synthesis of BiFeO3-BaFe12O19 solid solution is aimed to enhanced magnetic properties of the material which can improve the quality of multiferroic properties of material. As we know that BiFeO3 is a multiferroic material if it is in single phase but unfortunately it is difficult to produce BiFeO3 in single phase, which can cause a large current leakage arising from non stoichiometric. It used sol gel method to produce BiFeO3-BaFe12O19 solid solution with weight ratio of 1;1. To know magnetic properties, it was used permagraph test which is type of MPS magnet â€“ Physic EP3 â€“ Permagraph L . The sintering temperature was 750, 800 and 850oC for 8, 10 and 12 hours respectively. There is no regularity in increasing and decreasing of remanent and coersivity properties with increasing sinter temperatures and time of sintering but there is an increasing magnetic energy with increasing sinter temperatures and time of sintering. The highest value of magnetic energy, 10.716 GkA/mÂ belongs to powder sintered at 850oC for 12 hours.

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Section: Introductionmentioning

confidence: 92%

Improving Magnetic Properties of BiFeO3-BaFe12O19 Solid Solution by Different Sintering Time and Temperatures of Sol-Gel Method

Suastiyanti¹,

Maulida²,

Wijaya³

2019

AJAS

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“…al [7] developed Ba-M ferrite magnet with micro alloying of rare earth elements (La 3+ , Nd 3+ and Sm 3+ ) which results to decrease B r and increase H c from 2.87 to 3.34kOe. Transition metals like Co 3+ , Cu 2+ and Ti 3+ [8] have beneficial effects in improving magnetic properties and perfecting microstructure. Nowosielski et al [9] reported the effect of ball milling and annealing temperature on crystallite size, phase development and magnetic properties of BaFe 12 O 19 .…”

Section: Introductionmentioning

confidence: 99%

A Study on Synthesis, Structural and Magnetic Properties of La2O3 Doped Isotropic Ba-M Ferrites

Ahmad¹,

Khan²,

Tao

2020

RDMS

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Present work reports the synthesis, structural and magnetic properties of BaFe 11 O 17.5 and La 2 O 3 doped (Ba La 0.05 Fe 11 O 17.575 , BaLa 0.1 Fe 11 O 17.65 , BaLa 0.2 Fe 11 O 17.80 and BaLa 0.3 Fe 11 O 17.95) ferrites produced through powder metallurgy method with escalated magnetic properties. Phase evaluation, crystal structure, microstructure, and magnetic properties thermomagnetic characteristics for the La doped and La free ferrites have been investigated at varying sintered temperatures. XRD studies revealed that BaFe 12 O 19 phase is formed at 900 C through the reaction of Fe 2 O 3 and BaFe 2 O 4 . Electron microscopy studies elucidated that microstructural features depend critically on the heat treatment conditions as well as La content. La addition up to 1.0 mole found to be beneficial to refine particle size close to single domain wall size, which, in turn, led to enhance magnetic properties of the ferrite. Optimum magnetic properties for the La free BaFe 11 O 17.5 are H c =4.4kOe, B r =1.9kG, and (BH) max =0.85MGOe which were improved to H c =4.9kOe, B r =2.4kG and (BH) max =1.2MGOe with La 2 O 3 additive. The La 2 O 3 acts as a grain growth inhibitor and led to enhance high coercivity of 4.9kOe in the ferrite. The dielectric constant and dielectric loss factor decrease monotonically with increasing applied frequency at the constant temperature. Permeability is found to be sensitive to density and microstructural components like grain size and porosity of the sintered ferrites.

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“…Due to the large electric or magnetic loss, the ferrites and metal-based composites regarded as one of the candidates for EM wave absorbers have particularly aroused the interest of researchers. [2][3][4][5][6][7][8] However, the ferrites and metal-based composite absorbing materials have their own disadvantages such as relatively large thickness, high manufacturing cost, high electrical conductivity, and narrow absorption bandwidth, which restrict their widespread applications. It is necessary to seek for thin and lightweight materials with strong microwave absorption properties.…”

Section: Introductionmentioning

confidence: 99%

Microwave absorption properties of Ag naowires/carbon black composites

Huang¹,

Xia²,

Guo³

et al. 2017

Chinese Phys. B

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The composite that can absorb the high-performance electromagnetic (EM) wave is constructed into a sandwiched structure composed of carbon black (CB)/ethylene-vinyl acetate (EVA) and Ag naowires (AgNWs). The AgNWs sandwiched between two CB/EVA layers are used to improve the absorption properties of composite. The effects of EVA-to-CB weight ratio, concentration and diameter of AgNWs with a thickness of 0.4 mm on microwave absorption are investigated. The results indicate that for an EVA-to-CB weight ratio of 1:3, AgNW concentration of 1.0 mg/100 mL, and average diameter of 56 nm, the reflection loss (RL) of the composite is below −10 dB in a frequency range of 9.3 Ghz-18.0 GHz, with the minimum values of −40.0 dB and −25.6 dB at 13.5 GHz and 15.3 GHz, respectively. A finite element method (FEM) is used for calculating the RL of the composite. The calculated results are in agreement with the experimental data.

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Low-temperature co-fired Ni–Ti co-substituted barium ferrites

Cited by 10 publications

References 27 publications

Improving Magnetic Properties of BiFeO<sub>3</sub>-BaFe<sub>12</sub>O<sub>19</sub> Solid Solution by Different Sintering Time and Temperatures of Sol-Gel Method

Improving Magnetic Properties of BiFeO<sub>3</sub>-BaFe<sub>12</sub>O<sub>19</sub> Solid Solution by Different Sintering Time and Temperatures of Sol-Gel Method

A Study on Synthesis, Structural and Magnetic Properties of La2O3 Doped Isotropic Ba-M Ferrites

Microwave absorption properties of Ag naowires/carbon black composites

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