A study on Cu substituted chemically processed Ni–Zn–Cu ferrites

Rahman, I.Z.; Ahmed, T. T.

doi:10.1016/j.jmmm.2004.11.250

Cited by 97 publications

(52 citation statements)

References 7 publications

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“…For x ≥ 0.20, a minor phase of CuO was observed as shown in Fig.1(b). The formation of the undesirable CuO phase with increasing the Cu content was also observed by other investigators [5,6]. The considerable broadening of the XRD peaks, confirms that the synthesized powders are nanostructured.…”

Section: Resultssupporting

confidence: 84%

Magnetization Studies of Ni-Cu Ferrite Nanoparticles Synthesized by the Microwave-Combustion Method

Elshahawy

Mahmoud

Makhlouf

2014

J. Jpn. Soc. Powder Powder Metallurgy

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Ni 1-x Cu x Fe 2 O 4 nanoparticles were successfully synthesized by a microwave-induced combustion process using urea as fuel. The XRD study confirmed the formation of a single-phase of cubic spinel Ni˗Cu ferrite at low copper content. However, CuO is identified as a minor phase for x  0.15. Room temperature magnetization results showed that the magnetization increases and the coercivity decreases with increasing copper content.

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Section: Resultssupporting

confidence: 84%

Magnetization Studies of Ni-Cu Ferrite Nanoparticles Synthesized by the Microwave-Combustion Method

Elshahawy

Mahmoud

Makhlouf

2014

J. Jpn. Soc. Powder Powder Metallurgy

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“…The anisotropy constant only slightly changes with composition [37,38], therefore K1 was assumed to be constant and equal to 5.10 10 4 erg/cm 2 [36,39].…”

Section: A -Amorphousmentioning

confidence: 99%

Structural, magnetic and thermal properties of one-dimensional CoFe2O4 microtubes

Gao

et al. 2016

Journal of Alloys and Compounds

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Abstract:One-dimensional CoFe2O4 microtubes have been prepared via a simple template-assembled sol-gel method. Influence of calcination temperature on structural and magnetic properties, heat capacity and specific heating rate under radiofrequency field 295 kHz was studied. A CoFe2O4 spinel was the main phase in all samples. As the calcination temperature increased, the average crystal size increased from 34.1 to 168 nm and the specific surface area decreased from 85.7 to 8.5 m 2 g -1 . When calcined at 1073 K, porous microtubes with a narrow size distribution in the range between 2.0 and 2.5 m and a length to diameter ratio exceeding 20 were obtained. The heat capacity of the microtubes calcined at 973 K was 140.81 J·mol -1 ·K -1 at 395K, being close to the theoretic value. The sample calcined at 973 K showed highest rate of 0.293 K s -1 ·mg -1 .

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“…This created considerable interest in many research workers for the development and potential applications of ferrites in the electronic industry [10][11][12]. Now a days the study of ferrites has occupied an important place in the electronics technology [13]. The practical applications of ferrites are now of immense service in every day life, as electronic and magnetic ceramics.…”

Section: Introductionmentioning

confidence: 99%

INFLUENCE OF TIME AND TEMPERATURE ON RESISTIVITY AND MICROSTRUCTURE OF Cux Co1-x Fe2 O4 MIXED FERRITES

Bammannavar¹,

Naik²,

Pujar³

et al. 2008

PIER Letters

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Abstract-Copper-cobalt ferrites with general chemical formula Cu x Co 1−x Fe 2 O 4 (with x = 0.0, 0.4, 0.6 & 1.0) were prepared by ceramic method. The solid state reaction was confirmed by XRD patterns. DC conductivity was measured by two probe method. Electrical resistivity is found to increase on lowering of sintering temperature and time. At x = 1.0, the conduction is mainly due to hopping of electrons leading to n-type conductivity while at x = 0.0, conduction is due to holes leading to P-type conductivity. The lowest conduction at x = 0.4 is attributed to the electron hole compensation. SEM micrographs were obtained from JEOL scanning electron microscope. The micrographs reveal that an average grain size increases with sintering temperature and time as a result of decrease in porosity. This leads to the decrease in resistivity with sintering temperature and time. One of the factors for higher conductivity in ferrites is an increase in average grain size and decrease in pore concentration during the heat treatment.

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A study on Cu substituted chemically processed Ni–Zn–Cu ferrites

Cited by 97 publications

References 7 publications

Magnetization Studies of Ni-Cu Ferrite Nanoparticles Synthesized by the Microwave-Combustion Method

Magnetization Studies of Ni-Cu Ferrite Nanoparticles Synthesized by the Microwave-Combustion Method

Structural, magnetic and thermal properties of one-dimensional CoFe2O4 microtubes

INFLUENCE OF TIME AND TEMPERATURE ON RESISTIVITY AND MICROSTRUCTURE OF Cu<sub>x</sub> Co<sub>1-x</sub> Fe<sub>2</sub> O<sub>4</sub> MIXED FERRITES

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