High temperature thermoelectric power studies of Cu–Cr ferrites

Venkateshwarlu, Ch.; Ravinder, D.

doi:10.1016/j.jallcom.2004.12.044

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…Very few works are reported on the Cr‐substituted copper ferrites . Generally, the substitution with magnetic Cr ion can produce magnetic dilution, which may induce amazing magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

“…Very few works are reported on the Cr-substituted copper ferrites. [4][5][6][7][8] Generally, the substitution with magnetic Cr ion can produce magnetic dilution, which may induce amazing magnetic properties. On the other hand, the substitution with nonmagnetic ions such as zinc may cause changes in the cation distribution of ferrite systems and consequently drastically affects structural and magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

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Zn‐Cr Co‐Substitution Effect on Structural and Electromagnetic Properties of CuFe₂O₄ via Oxalate Decomposition Route

Gabal

2016

Int J Applied Ceramic Tech

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Zn‐Cr‐co‐substituted Cu1‐xZnxFe2‐2xCr2xO4 ferrites (where x = 0.0–0.5) were prepared via thermal decomposition of oxalate precursors. The thermal decomposition up to ferrites formation was followed by differential thermal analysis–thermogravimetry measurements. Mössbauer technique was used to predict the possible cation distribution of the entire system, and X‐ray diffraction, Fourier transform infrared, and electromagnetic measurements were used for confirmation. The superparamagnetic characteristics estimated via Mössbauer studies, for samples with higher substitution, agreed well with vibrating sample magnetometer, magnetic susceptibility, and conductivity results. All the samples showed semiconducting properties in which conductivity decreases by increasing substitution. The effect of cationic substitution on the entire system was investigated and discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zn‐Cr Co‐Substitution Effect on Structural and Electromagnetic Properties of CuFe₂O₄ via Oxalate Decomposition Route

Gabal

2016

Int J Applied Ceramic Tech

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“…x O 4 is a n-type conductor as x is equal to 0.2, [13]. CuCr 2 O 4 can store or release oxygen at different temperature or atmosphere [14,15] The powders were then uniaxially pressed at 100MPa…”

Section: Cucr X Fe 2-mentioning

confidence: 99%

A Novel Low-Temperature-Fired Multifunctional Varistor-Magnetic Ferrite Materials

Hsiang

2012

Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT)

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A novel low temperature-fired (950°C) multifunctional varistor-magnetic ferrite materials can be obtained by adding V2O5 into CuCr0.2Fe1.8O4 ferrites. The relationship between the grain-boundary composition and varistor properties were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersion spectroscopy (EDS), and X-ray photoelectric spectroscopy (XPS). The addition of V2O5 can effectively reduce the sintering temperature of CuCr0.2Fe1.8O4 ferrites to temperatures of lower than 950°C. Moreover, the V5+ ions occupied the octahedral site of spinel structure and acted as donor dopant, which resulted in the semiconductive grain. The copper-rich observation at the grain boundary based on the TEM and EDS results implied that copper oxide would possibly develop at the grain boundary as the acceptor state, forming double Schottky barriers with the n-type semiconductor grains.

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Structural and magnetic properties of nano-sized Cu–Cr ferrites prepared through a simple method using egg white

Gabal¹

2010

Materials Letters

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High temperature thermoelectric power studies of Cu–Cr ferrites

Cited by 3 publications

References 7 publications

Zn‐Cr Co‐Substitution Effect on Structural and Electromagnetic Properties of CuFe₂O₄ via Oxalate Decomposition Route

Zn‐Cr Co‐Substitution Effect on Structural and Electromagnetic Properties of CuFe₂O₄ via Oxalate Decomposition Route

A Novel Low-Temperature-Fired Multifunctional Varistor-Magnetic Ferrite Materials

Structural and magnetic properties of nano-sized Cu–Cr ferrites prepared through a simple method using egg white

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High temperature thermoelectric power studies of Cu–Cr ferrites

Cited by 3 publications

References 7 publications

Zn‐Cr Co‐Substitution Effect on Structural and Electromagnetic Properties of CuFe2O4 via Oxalate Decomposition Route

Zn‐Cr Co‐Substitution Effect on Structural and Electromagnetic Properties of CuFe2O4 via Oxalate Decomposition Route

A Novel Low-Temperature-Fired Multifunctional Varistor-Magnetic Ferrite Materials

Structural and magnetic properties of nano-sized Cu–Cr ferrites prepared through a simple method using egg white

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Zn‐Cr Co‐Substitution Effect on Structural and Electromagnetic Properties of CuFe₂O₄ via Oxalate Decomposition Route

Zn‐Cr Co‐Substitution Effect on Structural and Electromagnetic Properties of CuFe₂O₄ via Oxalate Decomposition Route