Synthesis of surfactant free stable nanofluids based on barium hexaferrite by pulsed laser ablation in liquid

Archana, V.; Johny, Jacob; Garza-Navarro, Marco A.; Shaji, Sadasivan; Thomas, Sabu; Anantharaman, M. R.

doi:10.1039/c8ra02754d

Cited by 19 publications

(1 citation statement)

References 36 publications

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“…The absence of nitrogen peak confirms that there is no trace of impurities and the sample has undergone a complete auto combustion. The intense peaks at 777.90 and 792.998 eV were attributed to the 3d peak of Ba 2+ which is split into two peaks of 3d 5/2 and 3d 3/2 [36]. There were 7.78% of Ba 2+ ions contained in the sample.…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 98%

Tuning the magnetic properties of hard–soft Ba_0.5Sr_0.5Fe₁₀Al₂O₁₉ and Ni_0.1Co_0.9Fe₂O₄ nanocomposites via one pot sol–gel auto combustion method for permanent magnet applications

Abarna,

Ezhil Vizhi

2024

Nanotechnology

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Permanent magnets generate magnetic fields that can be sustained when a reverse field is supplied. These permanent magnets are effective in a wide range of applications. However, strategic rare-earth element demand has increased interest in replacing them with huge energy product (BH)max. Exchange-coupled hard/soft ferrite nanocomposites have the potential to replace a portion of extravagant rare earth element-based magnets. In the present, we have reported the facile auto-combustion synthesis of exchange coupled Ba0.5Sr0.5Fe10Al2O19 and Ni0.1Co0.9Fe2O4 nanocomposites by increasing the content of soft ferrite over the hard from x= 0.1 to 0.4 wt.%. The XRD combined with Rietveld analysis reflected the presence of hexaferrite and spinel ferrite without the existence of secondary phases. The absorption bands from the FTIR analysis proved that the presence of M-O bonds in tetrahedral site and octahedral sites. Rod and Non-spherical images from TEM represent the hexaferrite and spinel ferrite. Smooth M-H curve and single peak of SFD curve proves that the material has undergone a good exchange coupling. The nano powders displayed an increase in saturation magnetization and decrease in coercivity with the increases in the spinel content. The prepared nano composites were showing higher energy product. And the composite with the ratio x=0.2 displayed a higher value of (BH)max of 13.16 kJ/m3.

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Section: X-ray Photoelectron Spectroscopymentioning

confidence: 98%

Tuning the magnetic properties of hard–soft Ba_0.5Sr_0.5Fe₁₀Al₂O₁₉ and Ni_0.1Co_0.9Fe₂O₄ nanocomposites via one pot sol–gel auto combustion method for permanent magnet applications

Abarna,

Ezhil Vizhi

2024

Nanotechnology

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Room‐Temperature Laser Synthesis in Liquid of Oxide, Metal‐Oxide Core‐Shells, and Doped Oxide Nanoparticles

Amendola

Amans

Ishikawa

et al. 2020

Chemistry A European J

230

186

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Although oxide nanoparticles are ubiquitous in science and technology, a multitude of compositions, phases, structures, and doping levels exist, each one requiring a variety of conditions for their synthesis and modification. Besides, experimental procedures are frequently dominated by high temperatures or pressures and by chemical contaminants or waste. In recent years, laser synthesis of colloids emerged as a versatile approach to access a library of clean oxide nanoparticles relying on only four main strategies running at room temperature and ambient pressure: laser ablation in liquid, laser fragmentation in liquid, laser melting in liquid and laser defect‐engineering in liquid. Here, established laser‐based methodologies are reviewed through the presentation of a panorama of oxide nanoparticles which include pure oxidic phases, as well as unconventional structures like defective or doped oxides, non‐equilibrium compounds, metal‐oxide core–shells and other anisotropic morphologies. So far, these materials showed several useful properties that are discussed with special emphasis on catalytic, biomedical and optical application. Yet, given the endless number of mixed compounds accessible by the laser‐assisted methodologies, there is still a lot of room to expand the library of nano‐crystals and to refine the control over products as well as to improve the understanding of the whole process of nanoparticle formation. To that end, this review aims to identify the perspectives and unique opportunities of laser‐based synthesis and processing of colloids for future studies of oxide nanomaterial‐oriented sciences.

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Modified sol–gel method for synthesis and structure characterisation of ternary and quaternary ferrite-based oxides for thermogravimetrically carbon dioxide adsorption

Sulaiman

Bakar

et al. 2023

Chem. Pap.

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Synthesis of surfactant free stable nanofluids based on barium hexaferrite by pulsed laser ablation in liquid

Abstract: Barium hexaferrite nanofluids based on five different solvents are prepared using pulsed laser ablation in liquid, the different solvents resulting in different particle diameters. This study paves the way for the synthesis of stable magnetic nanofluids of permanent magnets.

Cited by 19 publications

References 36 publications

Tuning the magnetic properties of hard–soft Ba_0.5Sr_0.5Fe₁₀Al₂O₁₉ and Ni_0.1Co_0.9Fe₂O₄ nanocomposites via one pot sol–gel auto combustion method for permanent magnet applications

Tuning the magnetic properties of hard–soft Ba_0.5Sr_0.5Fe₁₀Al₂O₁₉ and Ni_0.1Co_0.9Fe₂O₄ nanocomposites via one pot sol–gel auto combustion method for permanent magnet applications

Room‐Temperature Laser Synthesis in Liquid of Oxide, Metal‐Oxide Core‐Shells, and Doped Oxide Nanoparticles

Modified sol–gel method for synthesis and structure characterisation of ternary and quaternary ferrite-based oxides for thermogravimetrically carbon dioxide adsorption

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Synthesis of surfactant free stable nanofluids based on barium hexaferrite by pulsed laser ablation in liquid

Abstract: Barium hexaferrite nanofluids based on five different solvents are prepared using pulsed laser ablation in liquid, the different solvents resulting in different particle diameters. This study paves the way for the synthesis of stable magnetic nanofluids of permanent magnets.

Cited by 19 publications

References 36 publications

Tuning the magnetic properties of hard–soft Ba0.5Sr0.5Fe10Al2O19 and Ni0.1Co0.9Fe2O4 nanocomposites via one pot sol–gel auto combustion method for permanent magnet applications

Tuning the magnetic properties of hard–soft Ba0.5Sr0.5Fe10Al2O19 and Ni0.1Co0.9Fe2O4 nanocomposites via one pot sol–gel auto combustion method for permanent magnet applications

Room‐Temperature Laser Synthesis in Liquid of Oxide, Metal‐Oxide Core‐Shells, and Doped Oxide Nanoparticles

Modified sol–gel method for synthesis and structure characterisation of ternary and quaternary ferrite-based oxides for thermogravimetrically carbon dioxide adsorption

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Product

Resources

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Tuning the magnetic properties of hard–soft Ba_0.5Sr_0.5Fe₁₀Al₂O₁₉ and Ni_0.1Co_0.9Fe₂O₄ nanocomposites via one pot sol–gel auto combustion method for permanent magnet applications

Tuning the magnetic properties of hard–soft Ba_0.5Sr_0.5Fe₁₀Al₂O₁₉ and Ni_0.1Co_0.9Fe₂O₄ nanocomposites via one pot sol–gel auto combustion method for permanent magnet applications