Structural parameters and magnetic properties of copper ferrite nanopowders obtained by the sol-gel combustion

Журавлев, В. А.; Minin, R. V.; Итин, В. И.; Lilenko, I. Yu

doi:10.1016/j.jallcom.2016.09.069

Cited by 45 publications

(29 citation statements)

References 17 publications

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“…Although the unit cell parameters found in literature vary depending on the specific synthesis' thermal conditions used 15,17,31,32 , our results fit in the reported range of values. Recent articles studying the phase transition in sol-gel process 20,34 have obtained a cubic dominant structure just after the gel calcination, which tends to disappear later at higher temperatures. With treatments in the range of 350 °C or 400 °C, the cubic-to-tetragonal phase transition starts, and the tetragonal phase is completely dominant when the CuFe 2 O 4 is processed at or above 800 °C.…”

Section: Resultsmentioning

confidence: 99%

Influence of the Synthesis Route in Obtaining the Cubic or Tetragonal Copper Ferrite Phases

Rosa

Segarra

2020

Inorg. Chem.

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In this work, magnetic copper ferrite nanoparticles are synthesized by polymer-assisted sol-gel and co-precipitation methods. The obtained purity and particle size reach values of 96 % and 94 nm, respectively. Evident differences in the crystal structure have been found in the synthesized nanoparticles. A tetragonal structure is formed by the sol-gel method, while the cubic form is obtained when the co-precipitation approach is used. This work provides an experimental evidence of the formation of both phases by using the same reactants and thermal conditions, and only modifying the technical procedure. The formation and stability of each phase is analysed by temperature dependent measurements, and the observed crystal structure differences are used to propose a potential fundamental explanation to our observations based on a difference on the cations' distribution and the Jahn-Teller distortion. Moreover, different copper ferrite purity and particle sizes are found when using each of the methods. The spherical shape of the particles and their tendency to sinter forming micrometric clusters are observed by electron microscopy. Finally, the divergence in magnetization between the samples prepared by each method support our argument about the different cations' distribution and open the door to a wide range of different technological applications for these materials.

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Section: Resultsmentioning

confidence: 99%

Influence of the Synthesis Route in Obtaining the Cubic or Tetragonal Copper Ferrite Phases

Rosa

Segarra

2020

Inorg. Chem.

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“…All of these results are in good agreement with those from the LD particle size analysis and have been already observed in above-mentioned works. 13,15,22,23 Therefore, number percentage distributions can be understood as a representation of the size of the formed particles, whereas the volume percentage distribution gives information about the sintering process between the previously formed nanoparticles.…”

Section: Results and Discussionmentioning

confidence: 99%

“…For this reason, different researchers have recently used this method in their work. For instance, López-Ramón et al 22 and Zhuravlev et al 23 showed the formation of both phases, tetragonal and cubic, depending on the synthesis conditions. The report from Masunga et al 27 is a good summary of the work previously done in this field.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Synthesis of Copper Ferrite Nanoparticles by a Polymer-Assisted Sol–Gel Method

Rosa

Segarra

2019

ACS Omega

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Magnetic ferrites are used in a wide range of technological applications, such as biomedicine, electronics, or energy. They also present interesting magnetic properties, especially for high-frequency applications. These materials have been prepared by a large variety of methods, from basic solid-state reaction to advanced wet chemical methods. However, most of these approaches are complex and have low production rates. In this work, a deep analysis of an easy polymer-assisted sol–gel synthesis of copper ferrite (CuFe2O4) nanoparticles is done. A multivariate analysis, by means of the design of experiments approach, is carried out to account for two variables at a time. Moreover, a wide experimental domain is explored, and the impact of each variable on the chemical composition and magnetic properties is determined. This work results in an optimization of the synthesis method to obtain high-purity nanoparticles (∼96%).

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“…Further, soft ferrites include high resistivity, low cost, temperature stability, low loss, and high permeability [39][40][41][42]. The most significant soft ferrites are ZnCu ferrites with high permeability and saturation magnetization [43][44][45][46][47][48][49]. Properties of these nanomaterials can be modified by substitution of diamagnetic or Ferrites -Synthesis and Applications paramagnetic cations and their distribution in the spinel structure which alters the grain sizes, distribution, and surface morphology.…”

Section: Introductionmentioning

confidence: 99%

The Presented Study of Zn-Cu Ferrites for Their Application in “Photocatalytic Activities”

Sathyaseelan¹,

Iruson²,

Krishnmoorthy³

et al. 2021

Ferrites - Synthesis and Applications

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The present chapter summarizes the synthesis and characterization of Zinc Copper (ZnCu) ferrites due to their wide range of applications in many areas. ZnCu ferrites are soft magnetic materials that have exceptional electrical, magnetic, and optical properties. ZnCu ferrites possess high resistivity, permeability, permittivity, saturation magnetization and low power losses, and coercivity. The above features of ZnCu ferrites find application in designing transformers, transducers, and inductors. Ferrites are also used in magnetic fluids, sensors, and biosensors. Apart from these advantages, they play a vital role in practical appliances like mobile, laptops, mobile chargers, refrigerators, washing machines, microwave ovens, printers, and so on. Therefore, the present focus is on the literature of techniques of the synthesis, their characterization, the effect of doping on the behavior of ZnCu ferrite, and, finally, their potential application in technology.

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Structural parameters and magnetic properties of copper ferrite nanopowders obtained by the sol-gel combustion

Cited by 45 publications

References 17 publications

Influence of the Synthesis Route in Obtaining the Cubic or Tetragonal Copper Ferrite Phases

Influence of the Synthesis Route in Obtaining the Cubic or Tetragonal Copper Ferrite Phases

Optimization of the Synthesis of Copper Ferrite Nanoparticles by a Polymer-Assisted Sol–Gel Method

The Presented Study of Zn-Cu Ferrites for Their Application in “Photocatalytic Activities”

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