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article

New LiCo0.5PrxFe2−xO4 nanoferrites: Prepared via low cost technique for high density storage application

Zaheer Abbas Gilani, Muhammad Shahzad Shifa, H.M. Noor ul Huda Khan Asghar, Muhammad Azhar Khan, more

Ceramics International > 2018 > 44 > 2 > 1881-1885

Praseodymium substituted nano crystalline LiCo spinel ferrites with different concentrations were fabricated by micro-emulsion route. TGA, X-ray diffraction and magnetic properties was employed to study the effect of substitution of the Pr on the structure and magnetic parameters. XRD confirmed the formation of the single phase spinel ferrites with minor coexistence of orthophase. The particle size...

article

New LiNi0.5PrxFe2−xO4 nanocrystallites: Synthesis via low cost route for fabrication of smart advanced technological devices

Mohamed Farooq Warsi, Zaheer Abbas Gilani, Najeeb Fuad Al-Khalli, Mansoor Sarfraz, more

Ceramics International > 2017 > 43 > 17 > 14807- 14812

Praseodymium substituted nano-crystalline Li-Ni spinel ferrites with different Pr³⁺ contents were synthesized by micro-emulsion method. X-ray diffraction (XRD), scanning electron spectroscopy (SEM) and vibrating sample magnetometery (VSM) techniques were employed to study the impact of substitution of the Pr³⁺ on the structure, surface morphology and magnetic parameters. XRD confirmed the formation...

article

Synthesis of non-stoichiometric zinc ferrite for electromagnetic wave absorber applications

V. Seetha Rama Raju

Materials Science and Engineering: B > 2017 > 224 > C > 88-92

Zn doped Fe₃O₄ nanocrystalline powders are prepared by the Microwave Hydrothermal (M-H) method. The synthesized ferrite powders are characterized using Powder X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), and Vibrating Sample Magnetometry (VSM). Nanocrystalline ferrites of ∼10–20nm size are synthesized at a low temperature of 160⁰C after a treatment time of 60min. Magnetization...

article

Evaluation of structural, morphological and magnetic properties of CuZnNi (CuxZn0.5−xNi0.5Fe2O4) nanocrystalline ferrites for core, switching and MLCI’s applications

Majid Niaz Akhtar, Muhammad Azhar Khan, Mukhtar Ahmad, M.S. Nazir, more

Journal of Magnetism and Magnetic Materials > 2017 > 421 > C > 260-268

The influence of Cu substitution on the structural and morphological characteristics of Ni–Zn nanocrystalline ferrites have been discussed in this work. The detailed and systematic magnetic characterizations were also done for Cu substituted Ni–Zn nanoferrites. The nanocrystalline ferrites of Cu substituted Cu_xZn_0.5−xNi_0.5Fe₂O₄ ferrites (x=0, 0.1, 0.2, 0.3, 0.4 and 0.5) were synthesized using sol...

article

Structural, spectral, dielectric and magnetic properties of Tb–Dy doped Li-Ni nano-ferrites synthesized via micro-emulsion route

Muhammad Junaid, Muhammad Azhar Khan, F. Iqbal, Ghulam Murtaza, more

Journal of Magnetism and Magnetic Materials > 2016 > 419 > C > 338-344

Terbium (Tb) and dysprosium (Dy) doped lithium-nickel nano-sized ferrites (Li_0.2Ni_0.8Tb_0.5xDy_0.5xFe_2−xO₄ where x=0.00−0.08) were prepared by micro-emulsion technique. The X-ray diffraction (XRD) patterns confirmed the single phase cubic spinel structure. The lattice constant was increased due to larger ionic radii of Tb³⁺ and Dy³⁺ cations. The crystallite size was found in the range 30–42nm. The FTIR...

article

Impacts of Gd–Ce on the structural, morphological and magnetic properties of garnet nanocrystalline ferrites synthesized via sol–gel route

Majid Niaz Akhtar, A.B. Sulong, Mukhtar Ahmad, Muhammad Azhar Khan, more

Journal of Alloys and Compounds > 2016 > 660 > C > 486-495

The effect of Gd–Ce substitution on the structural, morphological and magnetic properties of garnet ferrites have been investigated in this study. The nanoferrites of Gd–Ce with different substitution Gd₃Ce_3−xFe₅O₁₂ (x = 0, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0) were prepared using sol–gel route. X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Thermogravimetric (TG) and differential...

article

Study of structural and magnetic properties of Li–Ni nanoferrites synthesized by citrate-gel auto combustion method

G. Aravind, M. Raghasudha, D. Ravinder, M. Manivel Raja, more

Ceramics International > 2016 > 42 > 2(PB) > 2941-2950

An attempt has been made to prepare nanocrystalline nickel substituted lithium ferrites, having chemical composition Li_0.5−0.5xNi_xFe_2.5−0.5xO₄ (where x=0.0–1.0 with a step increment of 0.2) by a citrate-gel auto combustion method. Structural characterization of the synthesized samples was carried out by X-ray diffraction analysis (XRD) and field emission scanning electron microscopy (FESEM). Magnetic...

article

Complex permeability spectra of PbO and Ta2O5 added nanocrystalline MgCuZn ferrites

Seetha Rama Raju V

Journal of Magnetism and Magnetic Materials > 2015 > 382 > C > 84-87

PbO and Ta₂O₅ added MgCuZn ferrites are prepared by the Microwave–Hydrothermal (M–H) processing. The nanocrystalline ferrites are sintered to a temperature of 900°C/4h. SEM pictures reveal that, the addition of PbO causes a small amount of grain growth, whereas the addition of Ta₂O₅ causes a fine-grained microstructure. The complex permeability spectra (µ^⁎=μ′−iμ″) of the prepared samples were measured...

article

Microwave Processing of Multilayer Chip Inductors Using MgCuZn Ferrites

V. Seetha Rama Raju

IEEE Transactions on Magnetics > 2015 > 51 > 5 > 1 - 6

MgCuZn ferrites are synthesized by the microwave-hydrothermal method and are processed with varying concentrations of PbO. The nanocrystalline ferrites are sintered using microwaves at a temperature of 900 °C for 30 min. SEM pictures reveal that the grains are uniformly distributed and the addition of PbO causes a small amount of grain growth. The radio frequency behaviors (

${\mu ^{\ast }}$

and...

article

Nanocrystalline ferrites used as adsorbent in the treatment process of waste waters resulted from ink jet cartridges manufacturing

Raluca Voda, Adina Negrea, Lavinia Lupa, Mihaela Ciopec, more

Open Chemistry > 2015 > 13 > 1

Dye pollution in waste waters causes serious environmental and health risk, legislation problems and is a serious challenge to environmental scientists. In this work the treatment of waste waters resulted from ink jet cartridges manufacturing, using different nanocrystalline ferrites M^IIFe₂O₄ (M^II = Mg, Cu) as adsorbent materials, has been investigated. The ferrites were obtained by thermal decomposition...

article

Nanocrystalline ferrites used as adsorbent in the treatment process of waste waters resulted from ink jet cartridges manufacturing

Raluca Voda, Adina Negrea, Lavinia Lupa, Mihaela Ciopec, more

Open Chemistry > 2015 > 13 > 1

article

Synthesis and characterization of nickel cobalt zinc ferrous hydrazine fumarate

S. G. Gawas, V. M. S. Verenkar, S. C. Mojumdar

Journal of Thermal Analysis and Calorimetry > 2015 > 119 > 2 > 825-830

Hydrazinated nickel cobalt zinc ferrous fumarate precursor has been synthesized and decomposed autocatalytically to Ni_0.4Co_0.2Zn_0.4Fe₂O₄. The thermal decomposition behavior of the precursor has been investigated by thermogravimetric (TG) and differential thermal analysis (DTA). The chemical composition was assigned to precursor based on chemical analysis, TG–DTA, infrared (IR), isothermal mass loss,...

article

Influence of cobalt substitution on the magnetic properties of zinc nanocrystals synthesized via micro-emulsion route

Huma Malik, Azhar Mahmood, Khalid Mahmood, Maria Yousaf Lodhi, more

Ceramics International > 2014 > 40 > 7 Part A > 9439-9444

A series of nanocrystalline spinel ferrites with chemical formula Co _x Zn _1−x Fe ₂ O ₄ (x=0, 0.2, 0.4, 0.6, 0.8, and 1.0) were synthesized by the micro-emulsion technique. The samples were annealed at 700°C for 7h at the rate of 15°C/min. The cubic spinel structure was systematically examined by X-ray diffraction and Fourier transform infrared spectroscopy. The lattice...

article

Frequency and temperature dependent electrical properties of Ni0.7Zn0.3CrxFe2−xO4 (0≤x≤0.5)

A.A. Birajdar, Sagar E. Shirsath, R.H. Kadam, S.M. Patange, more

Ceramics International > 2012 > 38 > 4 > 2963-2970

Series of the ferrite samples with a chemical formula Ni _0.7 Zn _0.3 Cr _x Fe _2−x O ₄ (x=0.0–0.5) were prepared by a sol–gel auto-combustion method and annealed at 600°C for 4h. The prepared samples have the cubic spinel structure with no impurity phase. As the Cr ³⁺ content x increases, the unit cell dimensions decrease with an increase in Cr ³⁺ ...

article

Elastic behaviour and internal friction studies on nanocrystalline Mn–Zn ferrite films prepared by the method of pulsed laser ablation

K. Praveena, K. Sadhana, S.R. Murthy

Journal of Alloys and Compounds > 2010 > 492 > 1-2 > 245-250

A laser ablation method was used for the preparation of nanocrystalline Mn–Zn ferrite thin films. Films were characterized using X-rays and TEM. The magnetic properties were measured using the vibrating sample magnetometer (VSM). The elastic behaviour and internal friction studies were carried out using composite piezoelectric oscillator method in the temperature range of 300–600K. It was found that...

article

Study on preparation of nanocrystalline ferrites using spent alkaline Zn–Mn batteries

Guoxi Xi, Li Yang, Maixi Lu

Materials Letters > 2006 > 60 > 29-30 > 3582-3585

The nanocrystalline ferrites were synthesized by sol–gel and self-propagating combustion methods using spent alkaline Zn–Mn batteries dissolved in nitric acid. The thermal decomposition process of dried gels, the essence of auto-combustion and the morphological structure of nanocrystalline ferrites were investigated by using DTA, TG, IR, XRD and SEM. The precise metal ion stoichiometry of the nanocrystalline...

article

Part I. The effect of surface roughness

H. Nathani, S. Gubbala, R.D.K. Misra

Materials Science & Engineering B > 2005 > 121 > 1-2 > 126-136

In the previous papers [R.D.K. Misra, A. Kale, R.S. Srivatsava, O. Senkov, Mater. Sci. Technol. 19 (2003) 826; R.D.K. Misra, A. Kale, B. Hooi, J.Th. DeHosson, Mater. Sci. Technol. 19 (2003) 1617; A. Kale, S. Gubbala, R.D.K. Misra, J. Magn. Magn. Mater. 277 (2004) 350; S. Gubbala, H. Nathani, K. Koizol, R.D.K. Misra, Phys. B 348 (2004) 317; R.D.K. Misra, S. Gubbala, A. Kale, W.F. Egelhoff, Mater. Sci...

article

Synthesis and characterization of Zn1−xNixFe2O4 spinels prepared by a citrate precursor

Mona Mouallem-Bahout, Sarah Bertrand, Octavio Peña

Journal of Solid State Chemistry > 2005 > 178 > 4 > 1080-1086

Nanocrystalline single-phase samples of Zn ₁₋ _x Ni _x Fe ₂ O ₄ ferrites (0<x<1) have been obtained via a soft-chemistry method based on citrate–ethylene glycol precursors, at a relatively low temperature (650°C). The influence of the nickel and zinc contents as well as that of heat treatments were investigated by means of X-ray powder diffraction, Brunauer–Emmett–Teller...

article

Magnetic properties of nanocrystalline Ni-Zn, Zn-Mn, and Ni-Mn ferrites synthesized by reverse micelle technique

S. Gubbala, H. Nathani, K. Koizol, R.D.K. Misra

Physica B: Physics of Condensed Matter > 2004 > 348 > 1-4 > 317-328

Nanocrystalline nickel-zinc, zinc-manganese, and nickel-manganese ferrites synthesized by reverse micelle synthesis technique were characterized by high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction, and the magnetic behavior studied by Superconducting Quantum Interference Device. The mixed (Ni-Zn, Zn-Mn, and Ni-Mn) ferrites exhibit blocking temperatures of 11, 20, and...

article

Magnetic study of nanocrystalline Mg-doped lithium ferrite

Marek Pękała, Frank J. Berry, Hisham M. Widatallah

Czechoslovak Journal of Physics > 2002 > 52 > 1 > A101-A104

Nanocrystalline magnesium doped ferrites with grain sizes between 50 and 11 nm were prepared by the ball milling. Magnetization of the non-milled ferrite diminishes monotonically with temperature and vanishes above the relatively high Curie temperature T _C of 900 K. A milling process suppresses T _C down to 830 K, which reveals the exchange interaction diminishing with the reduced grain sizes....

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NANOCRYSTALLINE FERRITES (20)
MAGNETIC PROPERTIES (4)
X-RAY DIFFRACTION (3)
XRD (3)
ADSORPTION (2)
INK JET (2)
OXALATE (2)
OXIDES (2)
FTIR (2)
LI-PR (2)
PRASEODYMIUM (2)
SEM (2)
VIBRATING SAMPLE MAGNETOMETER (2)
AUTO-COMBUSTION (1)
AUTOCATALYTIC DECOMPOSITION (1)
C. DIELECTRIC PROPERTIES (1)
CO-SUBSTITUTION (1)
COMPLEX PERMEABILITY (1)
COMPLEX PERMEABILITY SPECTRA (1)
COMPLEX PERMITTIVITY (1)
CONDUCTION MECHANISM (1)
CONDUCTIVITY (1)
D.C. RESISTIVITY (1)
DIELECTRIC PROPERTIES (1)
ELASTIC PROPERTIES (1)
ELECTROMAGNETIC HEATING (1)
ELECTROMAGNETIC PROPERTIES (1)
FC & ZFC STUDIES (1)
FERRITES (1)
FIELD EMISSION SCANNING AND TRANSMISSION ELECTRON MICROSCOPE (1)
FIELD EMISSION SCANNING ELECTRON MICROSCOPE (1)
GRAIN SIZE (1)
HYDRAZINE FUMARATE PRECURSOR (1)
HYSTERESIS LOOPS (1)
INDUCTORS (1)
INTERNAL FRICTION (1)
MAGNETISM (1)
MAGNETIZATION (1)
MICRO-EMULSION (1)
MICROEMULSION (1)
MICROWAVE HYDROTHERMAL METHOD (1)
MICROWAVE THEORY AND TECHNIQUES (1)
MÖSSBAUER SPECTROSCOPY (1)
M–H LOOPS (1)
PLD (1)
POWDER X-RAY DIFFRACTION (1)
POWDERS (1)
RADIO FREQUENCY AND MULTILAYER CHIP INDUCTORS (1)
REVERSE MICELLE (1)
SOL–GEL (1)
SPECIFIC SURFACE AREA (1)
SPENT ALKALINE ZN–MN BATTERIES (1)
SPINEL STRUCTURE (1)
SUPERPARAMAGNETISM (1)
SURFACE ROUGHNESS (1)
THERMAL ANALYSIS (1)
THERMAL PROPERTIES (1)
THIN FILMS (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 75.50.K (1)
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