The effect of sintering temperature on the electromagnetic properties of nanocrystalline MgCuZn ferrite prepared by sol–gel auto combustion method

Bahiraei, Hamed; Shoushtari, Morteza Zargar; Gheisari, Kh.; Ong, C. K.

doi:10.1016/j.matlet.2014.02.027

Cited by 23 publications

(4 citation statements)

References 9 publications

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“…Thus, μ i attains maximum value at peak position. For further increase in frequency greater than 2 MHz, it decreased to lower value obeying Snoek's law as f p α 1/(μ′−1), where f p is the peaking frequency at Snoek's limit and μ′ is the initial permeability. The lagging nature of motion of the domain walls with alternating field frequencies causes the evolution of imaginary part of complex permeability .…”

Section: Resultsmentioning

confidence: 97%

Effect of Nonmagnetic Zn²⁺ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites

Naidu

Madhuri

2016

Int J Applied Ceramic Tech

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Magnesium is replaced systematically by zinc in Ni0.2Mg0.8‐xZnxFe2O4 (x = 0.2–0.8) prepared by microwave‐assisted solid‐state reaction route. The structure is confirmed by X‐ray diffractograms. An improvement in initial permeability is observed with substituent in Ni0.2Mg0.8‐xZnxFe2O4 due to increase in average grain size. The obtained permeability values are varying between 106 and 687 at 1 MHz. The permeability plots revealed that Curie‐transition temperature (Tc) is decreasing with increase in zinc. Both x = 0.2 and 0.4 compositions show low relative loss factor of order 10−5 to 10−4, which are exhibiting required magnetic properties for transformer and inductor core applications.

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Section: Resultsmentioning

confidence: 97%

Effect of Nonmagnetic Zn²⁺ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites

Naidu

Madhuri

2016

Int J Applied Ceramic Tech

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“…It is well-known that sintered ferrite with larger average grain size, higher bulk density, and pore-free microstructure shows higher saturation magnetization (M s ) [16]. As shown in Fig.…”

Section: Magnetic Propertiesmentioning

confidence: 93%

Influence of MoO3 additive on grain growth and magnetic properties of Mg0.3Cu0.2Zn0.5Fe2O4 ceramics sintered at low temperature

Bahiraei

Ong

2021

J Mater Sci: Mater Electron

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In this research paper, microstructural, electromagnetic properties, and thermal stability, of (Mg 0.3 Cu 0.2 Zn 0.5 O) (Fe 2 O 3 ) ceramics were adjusted by using lowmelting point molybdenum trioxide (MoO 3 ) as additive. The required ferrite powders were synthesized through a cost-effective sol-gel method. The ferrite ceramics with high density and high permeability were prepared, using various content of MoO 3 (from 0.00 to 1.00 wt%) at low sintering temperature. Results indicate that MoO 3 not only improves density and grain growth of ferrite samples, but also effectively tailors the saturation magnetization (M s ), coercive field strength (H c ), initial permeability (l i ), and Curie temperature (T C ). For a qualitative comparison, the SEM images of both surface and fracture surface of the specimens were obtained. The results indicate that 0.25 wt% MoO 3 can promote grain growth, densification and uniformity, and reduce pores between grains of the sintered sample. In particular, MgCuZn ferrite with high bulk density (q = 4.7 g/cm 3 ), high initial permeability (l 0 = 460), high saturation magnetization (M s = 50.6 emu/g), and low coercivity (H c = 1.4 Oe) are obtained when the content of additive is 0.25 wt%. However, the excessive amount of MoO 3 deteriorates the grain size uniformity and weakens the magnetic properties due to the production of non-magnetic MoO 3 liquid phase.

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“…It is well-known that the sol-gel processing conditions have a significant influence on the microstructures, especially for the sintering temperature. Particularly, the sintering temperature plays an important role and has remarkable influences on the microstructures (including the crystallinity, morphology and grain size) and properties of material (Bahiraei et al, 2014 ; Xia et al, 2015 ; Dubey et al, 2017 ). Hence, it can be concluded that the electrode materials obtained at different sintering temperatures have various microstructures and electrochemical performances.…”

Section: Introductionmentioning

confidence: 99%

Sintering Temperature Induced Evolution of Microstructures and Enhanced Electrochemical Performances: Sol-Gel Derived LiFe(MoO4)2 Microcrystals as a Promising Anode Material for Lithium-Ion Batteries

Wang

et al. 2018

Front. Chem.

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A facile sol-gel process was used for synthesis of LiFe(MoO4)2 microcrystals. The effects of sintering temperature on the microstructures and electrochemical performances of the as-synthesized samples were systematically investigated through XRD, SEM and electrochemical performance characterization. When sintered at 650°C, the obtained LiFe(MoO4)2 microcrystals show regular shape and uniform size distribution with mean size of 1–2 μm. At the lower temperature (600°C), the obtained LiFe(MoO4)2 microcrystals possess relative inferior crystallinity, irregular morphology and vague grain boundary. At the higher temperatures (680 and 700°C), the obtained LiFe(MoO4)2 microcrystals are larger and thicker particles. The electrochemical results demonstrate that the optimized LiFe(MoO4)2 microcrystals (650°C) can deliver a high discharge specific capacity of 925 mAh g−1 even at a current rate of 1 C (1,050 mA g−1) after 500 cycles. Our work can provide a good guidance for the controllable synthesis of other transition metal NASICON-type electrode materials.

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The effect of sintering temperature on the electromagnetic properties of nanocrystalline MgCuZn ferrite prepared by sol–gel auto combustion method

Cited by 23 publications

References 9 publications

Effect of Nonmagnetic Zn²⁺ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites

Effect of Nonmagnetic Zn²⁺ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites

Influence of MoO3 additive on grain growth and magnetic properties of Mg0.3Cu0.2Zn0.5Fe2O4 ceramics sintered at low temperature

Sintering Temperature Induced Evolution of Microstructures and Enhanced Electrochemical Performances: Sol-Gel Derived LiFe(MoO4)2 Microcrystals as a Promising Anode Material for Lithium-Ion Batteries

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The effect of sintering temperature on the electromagnetic properties of nanocrystalline MgCuZn ferrite prepared by sol–gel auto combustion method

Cited by 23 publications

References 9 publications

Effect of Nonmagnetic Zn2+ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites

Effect of Nonmagnetic Zn2+ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites

Influence of MoO3 additive on grain growth and magnetic properties of Mg0.3Cu0.2Zn0.5Fe2O4 ceramics sintered at low temperature

Sintering Temperature Induced Evolution of Microstructures and Enhanced Electrochemical Performances: Sol-Gel Derived LiFe(MoO4)2 Microcrystals as a Promising Anode Material for Lithium-Ion Batteries

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Effect of Nonmagnetic Zn²⁺ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites

Effect of Nonmagnetic Zn²⁺ Cations on Initial Permeability of Microwave‐Treated NiMg Ferrites