Salt-assisted solution combustion synthesis of NiFe2O4: Effect of salt type

Abbasian, Ahmad Reza; Mahvary, Alireza; Alirezaei, Shahram

doi:10.1016/j.ceramint.2021.05.086

Cited by 13 publications

(13 citation statements)

References 30 publications

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“…For spinel AB 2 O 4 structure, depending on metal situation in tetrahedral/octahedral spaces, two absorption bands are expected to observe. Because tetrahedral bond length is smaller than octahedral bond length, the vibration frequency of tetrahedral bond will be higher 36 . Figure 4 shows the FTIR spectra of powders synthesized with different fuels.…”

Section: Resultsmentioning

confidence: 99%

“…FTIR, Fourier transform infrared quency of tetrahedral bond will be higher. 36 Figure 4 shows the FTIR spectra of powders synthesized with different fuels. As illustrated, two distinct bands at 590 and 462 cm −1 could be observed for samples that were synthesized with glycine and urea fuels.…”

Section: Molecular Characterizationsmentioning

confidence: 99%

“…These bands are associated related to stretching vibrations oxygen-metal bond in tetrahedral and octahedral spaces. 36 Thus, the band at 590 cm −1 belongs to vibration of oxygen-metal (Fe-O) bond in tetrahedral sites, and the band at 462 cm −1 is attributed to the vibration of oxygen-metal (Cr-O) bond in octahedral sites.…”

Section: Molecular Characterizationsmentioning

confidence: 99%

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Solution combustion synthesis of FeCr ₂ O ₄ powders for pigment applications: Effect of fuel type

Paborji

Afarani

Arabi

et al. 2022

Int J Applied Ceramic Tech

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Solution combustion synthesis of iron chromite was reported using iron(III) nitrate nonahydrate and chromium(III) nitrate nonahydrate as starting materials, as well as glycine, urea, citric acid, and ethylene glycol as fuels. The influence of fuel type on the structure, molecular, microstructure as well as chromatic properties of samples was investigated. The X‐ray diffraction (XRD) patterns showed that unlike themodynamical prediction, glycine fuel led to strongest combustion and consequent highest XRD peak intensities and lower lattice parameters. Moreover, the change of fuel type and mixing of fuels affected XRD data. Fourier transform infrared analysis showed that the band position of Cr–O and Fe–O bonds were shifted to higher frequencies by using of fuels with weaker combustion reactions. In addition, scanning electron micrographs showed that different morphologies of FeCr2O4 particles were obtained depending on the fuel type and ratios. Energy‐dispersive X‐ray spectroscopy analysis of the samples showed that oxygen concentration of samples was less than that of stoichiometric ratio of FeCr2O4 due to local reducing atmosphere. Furthermore, chromatic properties of the powders showed that the pigment synthesized with glycine fuel has a better and lighter grayish brown color than the other ones and can be used as a suitable industrial candidate to create a brown color in the ceramic glaze.

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Section: Resultsmentioning

confidence: 99%

Section: Molecular Characterizationsmentioning

confidence: 99%

Section: Molecular Characterizationsmentioning

confidence: 99%

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Solution combustion synthesis of FeCr ₂ O ₄ powders for pigment applications: Effect of fuel type

Paborji

Afarani

Arabi

et al. 2022

Int J Applied Ceramic Tech

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show abstract

“…For spinel AB 2 O 4 structure, depending on metal situation in tetrahedral/octahedral spaces, two absorption bands are usually observed. As tetrahedral bond length is shorted than octahedral bond length, the vibration frequency of tetrahedral bond is higher 20 . Figure 5A–C shows the FTIR spectra of powders synthesized with the mixture of (a) glycine–urea, (b) glycine–citric acid, and (c) glycine–ethylene glycol fuels with a 1:1 molar ratio and post‐heated at different temperatures, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…As tetrahedral bond length is shorted than octahedral bond length, the vibration frequency of tetrahedral bond is higher. 20 Figure 5A-C shows the FTIR spectra of powders synthesized with the mixture of (a) glycine-urea, (b) glycine-citric acid, and (c) glycine-ethylene glycol fuels with a 1:1 molar ratio and post-heated at different temperatures, respectively. Octahedral/tetrahedral metal-O band positions (cm −1 ) were listed in Table 3.…”

Section: Molecular Characterizationsmentioning

confidence: 99%

Phase transformation of FeCr₂O₄ to (Fe,Cr)₂O₃ solid solution pigment powders: Effect of post‐heating temperature

Paborji

Afarani

Arabi

et al. 2022

Int J Applied Ceramic Tech

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Iron chromite powders were synthesized via solution combustion route using iron(III) nitrate nonahydrate and chromium(III) nitrate nonahydrate as starting materials, as well as glycine–urea, glycine–citric acid, and glycine–ethylene glycol mixtures as fuels. The effect of postheating at different temperatures on the structure, molecular, microstructure, and chromatic properties of powders and tiles colored by in‐glaze powders was studied. The X‐ray diffraction patterns showed that as‐synthesized powders were obtained in crystalline FeCr2O4 phases moreover, postheating of the powders led to d‐space shift and oxidation and formation of (Fe,Cr)2O3 solid solution phase regardless of fuel type. Phase transformation of FeCr2O4 to (Fe,Cr)2O3 solid solution was observed at 500/750°C depending on the dominant phase of as‐synthesized particles. Fourier transform infrared analysis illustrated that the band positions of octahedral M–O and tetrahedral M–O bonds were shifted due to Fe cations movement from their position and lattice shrinkage by increasing of post‐heating temperature. Moreover, scanning electron micrographs showed that Fe0.7Cr1.3O3 semispherical fine particles were formed from porous spongy FeCr2O4 particles due to oxidation and phase transformation during the postheating. Furthermore, chromatic properties of the samples were represented. The color properties of the pigments showed that the formation of brown pigments is provided with the phase transformation from FeCr2O4 to (Fe,Cr)2O3 at a temperature of up to 750°C. Moreover, increasing the color purity to this temperature is related to the removal of residual carbonaceous matters. The chromatic properties of the glazed tiles colored using the pigments showed that postheating between 250 and 500°C led to more brown appearance.

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Investigating the effect of Cd on the structure and magnetic properties of (Mn,Co,Ni,Cu,Zn)Fe2O4 high entropy spinel oxide

Khosravi,

Sharafi,

Irannejad

2024

Appl. Phys. A

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Salt-assisted solution combustion synthesis of NiFe2O4: Effect of salt type

Cited by 13 publications

References 30 publications

Solution combustion synthesis of FeCr ₂ O ₄ powders for pigment applications: Effect of fuel type

Solution combustion synthesis of FeCr ₂ O ₄ powders for pigment applications: Effect of fuel type

Phase transformation of FeCr₂O₄ to (Fe,Cr)₂O₃ solid solution pigment powders: Effect of post‐heating temperature

Investigating the effect of Cd on the structure and magnetic properties of (Mn,Co,Ni,Cu,Zn)Fe2O4 high entropy spinel oxide

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Salt-assisted solution combustion synthesis of NiFe2O4: Effect of salt type

Cited by 13 publications

References 30 publications

Solution combustion synthesis of FeCr 2 O 4 powders for pigment applications: Effect of fuel type

Solution combustion synthesis of FeCr 2 O 4 powders for pigment applications: Effect of fuel type

Phase transformation of FeCr2O4 to (Fe,Cr)2O3 solid solution pigment powders: Effect of post‐heating temperature

Investigating the effect of Cd on the structure and magnetic properties of (Mn,Co,Ni,Cu,Zn)Fe2O4 high entropy spinel oxide

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Product

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Solution combustion synthesis of FeCr ₂ O ₄ powders for pigment applications: Effect of fuel type

Solution combustion synthesis of FeCr ₂ O ₄ powders for pigment applications: Effect of fuel type

Phase transformation of FeCr₂O₄ to (Fe,Cr)₂O₃ solid solution pigment powders: Effect of post‐heating temperature