La3+-substituted β-ferrite: Investigation of structural, dielectric, FTIR and electrical polarization properties

Saeed, Samreen; Sadiq, Imran; Hussain, Syed Sajjad; Idrees, Mishal; Sadiq, Farhan; Riaz, Saira; Naseem, Shahzad

doi:10.1016/j.jallcom.2020.154854

Cited by 24 publications

(7 citation statements)

References 43 publications

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“…On the other hand, the enhancement in saturation polarization for x = 0.1 might be due to the increase in leakage current and hence the conductivity of sample also enhances [29]. Consequently, it was realized that the lossy behaviour of the samples increased with the Yb 3+ contents substitution which confirmed the decrease in the resistive nature of samples [17] and these results are in good agreement with resistivity results.…”

Section: Electrical Polarizationsupporting

confidence: 63%

“…Consequently, the Potassium ion can move to occupy the BR, aBR positions and can take part in ionic condition [17]. One of the most significant tasks associated with using these nanomaterials in a number of modern technical applications is to consider the impact of different diamagnetic and paramagnetic cations on the different properties of hexagonal ferrites [18].…”

Section: Introductionmentioning

confidence: 99%

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Sol-gel Synthesized Yb-substituted ?-type Hexagonal Ferrites: Study of Structural, Grain Morphology, Electrical Polarization, Electrical Resistivity, Magnetic and Permeability Properties

Raheel¹,

Sadiq²,

Hussain³

et al. 2022

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In present work, an investigation was carried out about the various important properties of Yb 3+ substituted Potassium based ?-hexaferrite KFe 11-x Yb x O 17 (x= 0.0, 0.02, 0.06, 0.1). The Sol-gel auto combustion technique was used to synthesize all the samples. The X-ray diffraction (XRD) patterns confirmed the single hexagonal phase for all prepared samples. The Scanning Electron Microscopy (SEM) confirmed the agglomeration of small particles into big grains. The DC electrical resistivity, measured in the voltage range of (-200V) to (200V), was observed to vary with Yb 3+ contents. The Polarization versus electric field loops revealed the lossy behaviour of pure and substitute samples which indicated the resistive nature of the samples. The saturation and remanence polarization first decreased and then increased with Yb 3+ substitution due to ferric ions distribution between octahedral sites and resistive nature of the samples, respectively. The samples exhibited peculiar magnetic behaviour with the substitution of Yb 3+ ions. The saturation magnetization was increased up to concentration x = 0.06 and then decreased with further substitution of Yb 3+ contents. The coercivity values varied in the range of 141.43 to 279.26 Oe for all the samples which confirmed the soft magnetic nature of present synthesized material. The real part (µ’) and imaginary part (µ’’) of permeability exhibited the high values at low frequencies and these values decreased with the increase of frequency. The prepared samples were supposed to be used as core material of transformer and in high frequency applications due to high resistivity value and low eddy current losses.

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Section: Electrical Polarizationsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Sol-gel Synthesized Yb-substituted ?-type Hexagonal Ferrites: Study of Structural, Grain Morphology, Electrical Polarization, Electrical Resistivity, Magnetic and Permeability Properties

Raheel¹,

Sadiq²,

Hussain³

et al. 2022

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“…Four main function groups of O–H, C–H, C=C, and C–O were detected in all materials. In addition, the carboxyl group of sodium alginate (–COOH) was found in bead materials (SPB and SPFB) 38 , and Fe–O was observed in materials with adding iron (III) oxide-hydroxide (SPF and SPFB) 39 . O–H represented the stretching of hydroxyl, alcohol, and phenolic groups of cellulose fiber, lignin, and pectin, and C–H demonstrated the stretching of a methyl group (–CH 2 ) in cellulose and hemicellulose 40 .…”

Section: Resultsmentioning

confidence: 99%

Powdered and beaded sawdust materials modified iron (III) oxide-hydroxide for adsorption of lead (II) ion and reactive blue 4 dye

Praipipat

Ngamsurach

Kosumphan

et al. 2023

Sci Rep

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The problems of lead and reactive blue 4 (RB4) dye contamination in wastewater are concerns because of their toxicities to aquatic life and water quality, so lead and RB4 dye removals are recommended to remove from wastewater before discharging. Sawdust powder (SP), sawdust powder doped iron (III) oxide-hydroxide (SPF), sawdust beads (SPB), and sawdust powder doped iron (III) oxide-hydroxide beads (SPFB) were synthesized and characterized with various techniques, and their lead or RB4 dye removal efficiencies were investigated by batch experiments, adsorption isotherms, kinetics, and desorption experiments. SPFB demonstrated higher specific surface area (11.020 m2 g−1) and smaller pore size (3.937 nm) than other materials. SP and SPF were irregular shapes with heterogeneous structures whereas SPB and SPFB had spherical shapes with coarse surfaces. Calcium (Ca) and oxygen (O) were found in all materials whereas iron (Fe) was only found in SPF and SPFB. O–H, C–H, C=C, and C–O were detected in all materials. Their lead removal efficiencies of all materials were higher than 82%, and RB4 dye removal efficiencies of SPB and SPFB were higher than 87%. Therefore, adding iron (III) oxide-hydroxide and changing material form helped to improve material efficiencies for lead or RB4 dye adsorption. SP and SPB corresponded to Langmuir model related to a physical adsorption process whereas SPF and SPFB corresponded to the Freundlich model correlated to a chemisorption process. All materials corresponded to a pseudo-second-order kinetic model relating to the chemical adsorption process. All materials could be reused more than 5 cycles with high lead removal of 63%, and SPB and SPFB also could be reused more than 5 cycles for high RB4 dye removal of 72%. Therefore, SPFB was a potential material to apply for lead or RB4 dye removal in industrial applications.

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“…Generally, the representation of the formulation looks like DFe11O17, where D divulges the alkali ions like (k + , Na + , Li +, etc.). It can provide ionic conductivity due to the movement of M + ions, which was a requirement for storage batteries [5]. Fe+2 ions in the spinel block in beta-ferrites describe electronic conductivity [6].…”

mentioning

confidence: 99%

“…(Beevers Ross), a-BR (anti-Beeverse Ross), and mO (mid-oxygen) sites in these alkali layers, and hence alkali ions reside into it. The ionic and electronic conductivity is reported low for KFe11O17 [5]. Hasnain Shakeel et.al reported that with the inclusion of rare-earth ion, resistivity of the material is improved [7].…”

mentioning

confidence: 99%

Unraveling the structural, electrical Polarization, FTIR, Thermal and electrochemical properties of Dy 3+ substituted ?-ferrites

Ahmad¹,

Aziz²,

Sadiq³

et al. 2022

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This research article reveals the effect of Dy +3 substitution on ?-ferrites KFe 11-x Dy x O 17 with composition (x=0.00, 0.25, 0.50, 0.75 and 1.0). The samples were synthesized by sol-gel auto- combustion method, sintered at 950 o C temperature. The XRD patterns confirmed the single phase of the synthesized samples. The crystallite size varied in the range of 21.49 nm to 25.24 nm for all samples. The polarization verses electric field (P-E) loops indicated the loosy behavior in all samples. The lossy behavior of the samples was seemed to be increased up to x=0.5 and then decreased. The theoretical expression was used to fit an upper branch of P-E loops. FT-IR spectra showed absorption bands at different wavenumbers due to M-O-M stretching vibrations, H-O-H stretching, and C-O-C stretching vibrations, which also confirmed the formation of the single-phase in the samples. Electrochemical measurements of synthesized nano ferrites were carried out by using cyclic voltammetry in a 3.0 M KOH solution. Electrochemical impedance spectroscopy (EIS) has been described by Nyquist plots.

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La3+-substituted β-ferrite: Investigation of structural, dielectric, FTIR and electrical polarization properties

Cited by 24 publications

References 43 publications

Sol-gel Synthesized Yb-substituted ?-type Hexagonal Ferrites: Study of Structural, Grain Morphology, Electrical Polarization, Electrical Resistivity, Magnetic and Permeability Properties

Sol-gel Synthesized Yb-substituted ?-type Hexagonal Ferrites: Study of Structural, Grain Morphology, Electrical Polarization, Electrical Resistivity, Magnetic and Permeability Properties

Powdered and beaded sawdust materials modified iron (III) oxide-hydroxide for adsorption of lead (II) ion and reactive blue 4 dye

Unraveling the structural, electrical Polarization, FTIR, Thermal and electrochemical properties of Dy 3+ substituted ?-ferrites

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