Precursor synthesis and microwave processing of nickel ferrite nanoparticles

Sankaranarayanan, V. K.; Sreekumar, C.

doi:10.1016/s1567-1739(02)00202-x

Cited by 79 publications

(32 citation statements)

References 5 publications

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“…These absorptions in the present case are very weak, which indicates that the residual carbon had mostly burnt away during the self-combustion process, and their wave numbers indicate that this carbon was in the form of complex carbonates. Heat treatment at 250 °C for 6 h followed by further heat treatment at 380 °C for 6 h led to the disappearance of these absorptions indicating complete removal of residual carbon from the sample [11].…”

Section: Ir Spectramentioning

confidence: 98%

Low sintering temperature of Mg-Cu-Zn ferrite prepared by the citrate precursor method

Atassi

Tally

2006

JICS

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Mg-Cu-Zn ferrite was prepared through a wet synthetic method by a self-combustion reaction directly from a citrate precursor. The as-synthesized powders were sintered at 750 °C for only 2 h. XRD patterns and FTIR spectra confirm the formation of single phase Mg-Cu-Zn ferrite after combustion. To the best of our knowledge, this is the first time that Mg-Cu-Zn ferrite is sintered at such a low temperature. The sintering process increased the crystallinity of the solid and the domain sizes.

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Section: Ir Spectramentioning

confidence: 98%

Low sintering temperature of Mg-Cu-Zn ferrite prepared by the citrate precursor method

Atassi

Tally

2006

JICS

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“…Therefore, it would be interesting to compare the rate of decrease in the magnetic hyperfine interaction of each sublattice and also investigate the effect of Zn ion on the structural deformations. The Ni-Zn ferrite has already been prepared by methods such as mechanochemical alloying [14], coprecipitation [15,16], hydrothermal [17][18][19], microwave [20], sol-gel [21][22][23][24], citrate precursor [25,26], nitrate-and reverse micelle [27]. However, these materials are sensitive, and their magnetic properties directly depend on the cation distribution and the particle sizes, which are affected by the method of preparation.…”

Section: Introductionmentioning

confidence: 99%

Mössbauer Spectroscopic Studies of NiZn Ferrite Prepared by the Sol-Gel Method

Niyaifar¹,

Mohammadpour²,

Rodriguez³

2015

Journal of Magnetics

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This study was aimed to study the effect of Zn content on the hyperfine parameters and the structural variation of Ni 1-x Zn x Fe 2 O 4 for x = 0, 0.2, 0.4, 0.6, and 0.8. To achieve this, a sol-gel route was used for the preparation of samples and the obtained ferrites were investigated by X-ray diffraction, scanning electron microscopy, and Mössbauer spectroscopy. The formation of spinel phase without any impurity peak was identified by X-ray diffraction of all the samples. Moreover, the estimated crystallite size by X-ray line broadening indicates a decrease with increasing Zn content. This result was in agreement with the scanning electron microscopy result, indicating the reduction in grain growth with further zinc substitution. The room-temperature Mössbauer spectra show that the hyperfine fields at both the A and B sites decreased with increasing Zn content; however, the rate of reduction is not the same for different sites. Moreover, the best fit parameter showed that the quadrupole splitting values of B site increased from the pure nickel ferrite to the sample with x = 0.8.

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“…However, this method has some unconquered disadvantages, such as high sintering temperature, inhomogeneity of the final product, growth of large crystallites, and so on. To avoid these disadvantages, various wet chemical routes, such as co-precipitation [11], sol-gel [12], microwave [13], aerosolization [14], and reverse micelle technique [15] were developed to synthesize nanocrystalline NiFe 2 O 4 . The sol-gel technique is feasible for tailoring physical properties by optimizing synthesis conditions, such as gelation time, temperature, reagent concentration, media pH value, and so on.…”

Section: Introductionmentioning

confidence: 99%