Structural, magnetic and dielectric properties of pure and nickel-doped barium nanohexaferrites synthesized using chemical co-precipitation technique

Dawar, Naini; Chitkara, Mansi; Sandhu, Inderjeet Singh; Jolly, Jaspreet Singh; Malhotra, Shivani

doi:10.1080/23311940.2016.1208450

Cited by 21 publications

(12 citation statements)

References 19 publications

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“…The results indicate the low leakage current for the Ba 1−x Mg x Fe 12−y Mn y O 19 depending upon the empirical study. This observed low dielectric loss behavior of synthesized materials is suitable for applications in various fields, for example, communication, microstrip antennas, and radio frequency devices 38,39 …”

Section: Resultsmentioning

confidence: 87%

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Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

et al. 2021

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Summary Mg and Mn ions doping were performed in barium hexaferrite (Ba1−xMgxFe12−yMnyO19) (x = 0.0, 0.30, 0.45, 0.60, 0.75, 0.90) and (y = 0.0, 0.15, 0.30, 0.45, 0.60, 0.75) via facile micro‐emulsion route. XRD analysis revealed the formation of single‐phase hexagonal geometry of Ba1−xMgxFe12−yMnyO19 with the successful doping of the Mg and Mn ions. The average crystallite size was 19.5 nm, which was increased by increasing the dopant contents. The functional groups were identified by FTIR analysis. The dopant contents (Mg and Mn) affected the dielectric properties Ba1−xMgxFe12−yMnyO19 and AC conductivity was increased, while dielectric loss, tangent loss, and resistivity were decreased as the concentration of dopant ions was increased. The Tauc's plot was used for the band gap estimation of Ba1−xMgxFe12−yMnyO19, the band gap values were decreased from 2.94 to 1.90 (eV) due to generation Fermi energy and change in the Ba2+ ions at the tetra‐ and octahedral locations. Photocatalytic activity (PCA) was performed under visible light by degrading Rhodamine B (RhB) dye. The RhB dye was degraded up to 85% within 50 minutes following the first order reaction kinetics with 0.0224 min−1 rate constant. The results revealed that the BaFe12O19 NPs the band gap can be tuned by doping the Mg and Mn ions to enhance the visible light harvesting for economical photocatalytic applications in various fields.

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Section: Resultsmentioning

confidence: 87%

“…This occupation causes a decrease in Ba 2+ and Fe 3+ ions; therefore, hopping between Fe 3+ and Fe 2+ ions decreases, which gives a low value of dielectric constant. Additionally, it may be due to the ferroelectric nature of hexaferrites 16,38 …”

Section: Resultsmentioning

confidence: 99%

Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

et al. 2021

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“…By adequately substituting different types of cations at the M 2+ or Fe 3+ site, magnetic properties of M-type hexaferrite can be improved. Several authors have tried to tailor M-type hexaferrites properties by replacing Fe 3+ by divalent cations such as Co, Cu, Ga, Ni [12][13][14][15], trivalent cations such as Al, Ce, La, Nd, Pr [16,17] and mixture of cations such as Co-Zr [18], Cu-V [19], Gd-Co [20], La-Co [21], Nd-Co [22], Zn-Mo [23], and Zn-Zr [24][25][26][27][28][29]. Very few studies have been reported on the alteration of SrM's magnetic properties by co-substitution of Zn 2+ -Zr 4+ cations [24--26].…”

Section: Introductionmentioning

confidence: 99%

Tailoring the magnetic properties of M-type strontium ferrite with synergistic effect of co-substitution and calcinations temperature

Godara

Kaur

Narang

et al. 2021

Journal of Asian Ceramic Societies

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SrFe 12 O 19 samples were initially prepared using sol-gel auto-combustion method and calcined from 500 to 1100°C (for 6 h). XRD data established the phase formation temperature of SrM phase to be ≈1000°C. Thereafter, the effect of Zn 2+ -Zr 4+ co-dopant on magnetic and structural properties of SrZn x Zr x Fe 12-2x O 19 (x = 0.00-1.00) samples calcined between 900-1100°C was investigated. XRD data shows that the cell volume increases (from 690.45Å 3 (x = 0.00) to 705.72Å 3 (x = 1.00)) while crystallite size decreases (from 123.9 nm (x = 0.00) to 62.3nm (x = 1.00)) calcined at 1000°C. The Rietveld refinement of XRD data confirms a) x = 0.00 sample to be phase pure and b) the presence of ZnFe 2 O 4 (≈2.25) & SrZrO 3 (≈2.93%) impurity phases in x = 1.00 sample, calcined at 1000°C. FESEM micrographs revealed that a) grain size decreases for x > 0.20 with `x' at 900°C and b) increases from 122 nm at 900°C to 443 nm at 1100°C, for x = 0.00. Broadening of Raman bands reveals generation of strain in the lattice with enhancement of Zn 2+ -Zr 4+ concentration. The magnetic studies reveal that the coercivity monotonically decreases (from 5358(x = 0.00) Oe to 690(x = 1.00) Oe at 1000°C) with enhancement of Zn 2+ -Zr 4+ concentration. A maximum M s value ≈ 70.89 emu/g was observed in x = 0.20 sample at 1100°C. M s value also decreases for x > 0.20 at each calcination temperature.

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“…The effect of substitution/addition on the physical properties of BaFe 12 O 19 has been recorded in many literatures. Substitutions can be done by the partial replacement of Fe 3+ ions with other cations such as Mn-Sn, Co-Sn and Mn-Co-Sn [21], Co [22,23] and Ni [24]. Moreover, substitutions can be done by the partial replacement of Ba 2+ ions with other cations as reported by Taufeeq et al [25] for studying the structural and thermal properties of pure BaFe 12 O 19 and Sr doped Ba 0.9 Sr 0.1 Fe 12 O 19 nanostructure.…”

Section: Introductionmentioning

confidence: 99%

Influence of cobalt addition and calcination temperature on the physical properties of BaFe₁₂O₁₉ hexaferrites nanoparticles

Rekaby

Shehabi

Awad

2020

Mater. Res. Express

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Nano-scale particles of pure Barium hexaferrite 'BaFe 12 O 19 ' and Cobalt added Barium hexaferrite 'Co x BaFe 12 O 19 ', with x=0.04, 0.06 and 0.1 wt%, were successfully synthesized by the chemical coprecipitation method. The synthesized powder was subjected to different calcination temperatures (T=850°C, 900°C, 950°C and 1050°C). X-ray powder diffraction (XRD) clarified that nearly single phase of BaFe 12 O 19 with tiny traces of Fe 2 O 3 phase were obtained when the precursor was calcined at 1050°C for 2 h. The lattice parameters and unit cell volume were almost unchanged with either Cobalt addition or calcination temperatures. From Debye-Scherrer equation, the crystallite size (D) was found to gradually increase with increasing calcination temperature to reach its maximum values for samples calcined at 1050°C. The formation of Barium hexaferrite phase was also confirmed from Fourier transform infrared (FTIR) spectra through the existence of strong absorption peaks that appeared between 581 cm −1 and 435 cm −1 . The morphology and grain size of the samples were examined using transmission electron microscopy (TEM) technique. Optical properties of the samples were studied through ultraviolet 'UV' visible spectroscopy. The optical band gap (E g ) of the samples was obtained from Tauc relation as function of Cobalt addition (x) and calcination temperature (T). Finally, the mechanical properties were examined using Vickers microhardness. The microhardness data revealed that the samples exhibited reverse indentation size effect (RISE). The Elastic modulus (E) and yield strength (Y) for the prepared samples were calculated, in accordance with Vickers microhardness, as function of Cobalt addition. Furthermore, the indentation size effect ISE was analyzed using indentation induced cracked model (IIC). The IIC model was found to be a suitable model for describing the microhardness results of the prepared samples. Time dependent Vickers microhardness was done through indentation creep test at different dwell time (t=10, 20, 30, 40 and 50 s) and constant applied loads (F=0.98, 4.90 and 9.80 N). Results clarified that the specimens revealed grain boundary sliding together with dislocation climbs at small loads and a dislocation creep in the operating creep process for greater loads.

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Structural, magnetic and dielectric properties of pure and nickel-doped barium nanohexaferrites synthesized using chemical co-precipitation technique

Cited by 21 publications

References 19 publications

Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Tailoring the magnetic properties of M-type strontium ferrite with synergistic effect of co-substitution and calcinations temperature

Influence of cobalt addition and calcination temperature on the physical properties of BaFe₁₂O₁₉ hexaferrites nanoparticles

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Structural, magnetic and dielectric properties of pure and nickel-doped barium nanohexaferrites synthesized using chemical co-precipitation technique

Cited by 21 publications

References 19 publications

Band gap tuning of BaFe 12 O 19 with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Band gap tuning of BaFe 12 O 19 with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Tailoring the magnetic properties of M-type strontium ferrite with synergistic effect of co-substitution and calcinations temperature

Influence of cobalt addition and calcination temperature on the physical properties of BaFe12O19 hexaferrites nanoparticles

Contact Info

Product

Resources

About

Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Influence of cobalt addition and calcination temperature on the physical properties of BaFe₁₂O₁₉ hexaferrites nanoparticles