Investigation on size dependent structural and magnetic behavior of nickel ferrite nanoparticles prepared by sol–gel and hydrothermal methods

Srivastava, Manish; Chaubey, S.; Ojha, Animesh K.

doi:10.1016/j.matchemphys.2009.07.023

Cited by 250 publications

(104 citation statements)

References 68 publications

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“…Due to their size (diameters ranging from 1 to 100 nm) nanoparticles present specific and controllable properties that are different from those they present on the macroscopic scale thus enabling unique applications (Duran et al 2006;Yetter et al 2009;Srivastava et al 2009). The change in properties is due to two main effects: (i) surface effects or size reduction effect (when particle size is reduced, a greater proportion of atoms are found at the surface); (ii) quantum confinement-modification in electronic structure (Srivastava et al 2009;Gupta and Gupta 2005).…”

Section: Introductionmentioning

confidence: 99%

“…The excess of energy of surface atoms contributes for many of the extraordinary characteristics of nanoparticles (Yetter et al 2009). This way, nanoscale materials present great potential for applications in several technological areas such as nanoelectronics and computer technology, medicine, aeronautics and space exploration, biotechnology and agriculture (Srivastava et al 2009). …”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization and Applications of Iron Oxide Nanoparticles - a Short Review

Campos

Pinto

Oliveira

et al. 2015

J.Aerosp. Technol. Manag.

201

100

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Iron oxide is a mineral compound that shows different polymorphic forms, including hematite (α-Fe 2 O 3 ), magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ). Solid propulsion technology nanoparticulate materials, such as hematite and maghemite, exhibit high performance on thermal decomposition of ammonium perchlorate. The enhanced catalytic effect of metallic iron oxide nanoparticles is attributed to their particle size, more active sites and high surface area, which promotes more gas adsorption during thermal oxidation reactions. Nowadays, metallic iron nanoparticles can be synthesized via numerous methods, such as co-precipitation, sol-gel, microemulsion, or thermal decomposition. Although there are data on these synthetic methods in the literature, there is a lack of details related to nanoparticulate oxides and to their characterization techniques. In this context, this short review based on scientific papers, including data from the last two decades, presents methods for obtaining nanoparticulate iron oxides as well as the main aspects of the different characterization techniques and also about the decomposition aspects of these nanomaterials. Morphologies and structures of iron oxides can be characterized through transmission electron microscopy, scanning electron microscopy, X-ray powder diffraction, and Fourier transform infrared spectroscopy. As for textural properties, they are usually determined by physical adsorption techniques.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Applications of Iron Oxide Nanoparticles - a Short Review

Campos

Pinto

Oliveira

et al. 2015

J.Aerosp. Technol. Manag.

201

100

View full text Add to dashboard Cite

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“…Nano-sized magnetic ferrite particles exhibit unique properties, which enable their use in a wide range of applications such as high density recording, high frequency devices and magnetic refrigerators [1,2]. There are several methods for synthesising nano-sized spinel ferrites, such as co-precipitation, sol-gel, microemulsion, hydrothermal and reverse micelle method [3][4][5]. Magnesium ferrite is a typical spinel in which the cation distribution in the crystal lattice site is sensitive to heat treatment due to high diffusibility of Mg 2þ ions [6,7].…”

mentioning

confidence: 99%

A comparative study of structural, electrical and magnetic properties of magnesium ferrite nanoparticles synthesised by sol-gel and co-precipitation techniques

Thankachan¹,

Xavier²,

Jacob³

et al. 2013

Journal of Experimental Nanoscience

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A comparative study of structural, electrical and magnetic properties of magnesium ferrite nanoparticles synthesised by sol-gel and co-precipitation techniques, Journal of Experimental Nanoscience, 8:3, 347-357, DOI: 10.1080/17458080.2012 Nano-sized magnesium ferrite was synthesised using co-precipitation and sol-gel techniques. Structural characterisation was performed using X-ray diffractometer (XRD), Fourier transform infrared (FTIR) spectrometer and scanning electron microscope. XRD analysis reveals the prepared samples are single phasic without any impurity. Particle size calculation shows that the crystallite size of sol-gel prepared samples is 9 nm and co-precipitation sample is 11 nm. FTIR analysis confirmed spinel structure of the prepared samples. Magnetic measurements show that both the samples are ferromagnetic with a high degree of isotropy in co-precipitation derived sample. The frequency dependence of the dielectric constant in the range 100 Hz-20 MHz was also investigated in the temperature range 303-533 K. The results of both the samples followed Maxwell-Wagner model based on interfacial polarisation in consonance with Koops theory.Keywords: nano-structured materials; magnesium ferrite; sol-gel technique; co-precipitation; magnetic measurement; dielectric properties IntroductionDiverse practical applications of spinel ferrites of the type MFe 2 O 4 has attracted the attention of researchers for decades. Nano-sized magnetic ferrite particles exhibit unique properties, which enable their use in a wide range of applications such as high density recording, high frequency devices and magnetic refrigerators [1,2]. There are several methods for synthesising nano-sized spinel ferrites, such as co-precipitation, sol-gel, microemulsion, hydrothermal and reverse micelle method [3][4][5]. Magnesium ferrite is a typical spinel in which the cation distribution in the crystal lattice site is sensitive to heat treatment due to high diffusibility of Mg 2þ ions [6,7]. Magnesium ferrites are used as humidity sensors [8], catalysts [9] and also in magnetic and gas sensing applications [10,11]. When its crystallite size is below a certain value, MgFe 2 O 4 possesses unique superparamagnetic properties at room temperature and has promising potential for applications in transformers, ferrofluids and magnet cores of coils [12,13].

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“…Alkali metal ferrites find extensive use in microwave components due to their attractive electrical and magnetic properties [1][2][3][4][5][6][7][8][9][10][11]. Ferrites have been reported as better electromagnetic materials than pure metals because of their low cost, high resistivity and ease of preparation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Zn dopant on Properties of Li ferrite Synthesized by Solution Combustion Method

Anu¹

2017

International Advanced Research Journal in Science, Engineering

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Herein, Urea assisted solution combustion method has been used for the preparation of stoichiometrically pure and Zn doped Li ferrites. Urea acts as a capping agent and helps in the formation of nanostructures. Solution combustion method helps easier formation of ferrites in a single step, at relatively lower temperature and in shorter time than the reported methods. Powder X-ray diffraction (XRD) studies with diffractometer indicate high purity, single phase spinel ferrites formation. Magnetic studies by vibratory sample magnetometer (VSM) reveal an increase in the magnitude of saturation magnetization with increasing Zn content up to x = 0.3. The Zn doped Li ferrite formed possess high dc-resistivity values which make them suitable for high-frequency applications. Apart from the academic interest involved, these investigations are of technological importance in the view of the fact that their end products (ferrites) play a key role as electro-magnetic materials in the modern industry.Keywords: Solution combustion method, powder X-ray diffraction, Powder X-ray diffraction, saturation magnetization, dc-resistivity. I INTRODUCTIONAlkali metal ferrites find extensive use in microwave components due to their attractive electrical and magnetic properties [1][2][3][4][5][6][7][8][9][10][11]. Ferrites have been reported as better electromagnetic materials than pure metals because of their low cost, high resistivity and ease of preparation. The properties of the ferrite materials, which decide the application areas, are generally governed by the chemical compositions along with the procedures followed for their preparation. Therefore, the molecular engineering of ferrite composition and employment of appropriate process parameters play a significant role in tailoring the material properties for a specific need. The properties of the ferrites can be modified by substituting the optimum amount of metal ions as dopant in the basic compositional formulae. It is, therefore, desirable to investigate and understand the dependence of composition on magnetic/electric behavior of these ferrites. Ferrite nanoparticles show unusual magnetic properties such as single domain behavior and superparamagnetism which are not observed in bulk material [12,13]. Also, the resistivity of the ferrites at room temperature can vary from 10 -2 to 10 11 ohm-cm [14][15][16]. The change in the resistivity is brought about by substitution of some appropriate metal ion in the metal site. To obtained sample with high resistivity, it is necessary to ensure that there are no ferrous ions in the stoichiometric ferrite. Therefore, chemical aspect has become the most important factor in the design and preparation of ferrite materials. Solution combustion method has been found to be the most suitable technique for the synthesis of a particular mixed ferrite composition. The properties of the final product (particle size, surface area and porosity) depend on the way the combustion is conducted. The departure of gases favours the desegregation of th...

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Investigation on size dependent structural and magnetic behavior of nickel ferrite nanoparticles prepared by sol–gel and hydrothermal methods

Cited by 250 publications

References 68 publications

Synthesis, Characterization and Applications of Iron Oxide Nanoparticles - a Short Review

Synthesis, Characterization and Applications of Iron Oxide Nanoparticles - a Short Review

A comparative study of structural, electrical and magnetic properties of magnesium ferrite nanoparticles synthesised by sol-gel and co-precipitation techniques

Effect of Zn dopant on Properties of Li ferrite Synthesized by Solution Combustion Method

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