Dense ferrites and their applications

Stuijts, A. L.; Verweel, J.; Peloschek, H.

doi:10.1109/tcome.1964.6592598

Cited by 22 publications

(6 citation statements)

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“…The results indicate a decrease of porosity with the substitution of Hg 2+ as compared with the parent compound magnetite. This indicates a possibility of constructing a well defi ned gap in the recording head with a gap width down to 1 μm (Stuijts et al 1964).…”

Section: Characterization Of Ferruginous Mercury Ferritementioning

confidence: 91%

Retrieval of Mercury from Wastewater as Stable Mercury Ferrite

Zade¹,

Dharmadhikari

2007

Water Quality Research Journal

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Mercury contamination in water and wastewater is a global risk and health problem. So there is a concrete need for an eco-friendly process that can remove the toxic mercury ions as well as convert the mercury to a value added product. The black ferruginous mercury ferrite (FMF) as a value added product was synthesized by coprecipitation technique at 50°C. X-ray diffraction studies conducted on FMF obtained using CuKα1 radiation revealed that this crystalline compound has an orthorhombic symmetry. The method described in this study removed mercury ions with greater efficiency compared with the prevalent methods quoted in the literature. The results of thermal analysis of the synthesized compound, on comparison with magnetite (Fe3O4), revealed a shifting of the exothermic peak towards the lower temperature side. This behavior indicates phase transition and sample crystallization. The DC resistivity studies on FMF carried out at various temperatures in the range of 27 to 500°C showed that the compound is a semiconductor in nature and shows sharp changes in the resistivity in the temperature range of 342.38 ± 10°C (Tcelect). The recovered FMF could be used in several applications such as semiconductors, at high temperature applications, to minimize eddy current losses, and as adsorbents as well as catalysts for the reduction of exhaust gas emissions.

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Section: Characterization Of Ferruginous Mercury Ferritementioning

confidence: 91%

Retrieval of Mercury from Wastewater as Stable Mercury Ferrite

Zade¹,

Dharmadhikari

2007

Water Quality Research Journal

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“…The co-precipitation method is one of the soft chemical routes which is used for the preparation of the nanoferrites Zn 0.95−x Ni 0.05 Co x Fe 2 O 4 (x=0.1,0.2,0.3,0.4,0.5) with appropriate composition of AR grade aqueous solution in the appropriate ratio of Nickel, Zinc, and Cobalt nitrates against ferric citrate in the equal ratio [11,12,13]. This citrate help to make the particles less soluble and decomposes at a lower temperature less than 873 K [14,15].…”

Section: Methodsmentioning

confidence: 99%

Co-Precipitation Synthesis of ZNCF Nanoparticle and their Structure, Morphological, and Magnetic Properties Characterization

Parajuli¹,

Vagolu

Chandramoli

et al. 2022

J. Nep. Phys. Soc.

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The Zinc Nickel Cobalt Ferrite (ZNCF) Zn0.95−xNi0.05CoxFe2O4, for x= 0.01, 0.02, 0.03, 0.04, 0.05 and 0.06 were prepared by co-precipitation. XRD patterns show spinel ferrite with a cubic structure. The lattice parameter was found to increase linearly with cobalt concentration (x). FESEM gave the grain sizes in the range 1.61-1.38nm and particle size in the range 28-21 nm for x = 0.01 to 0.06. The porosity was in the range 92.6-92.9 %. The occupancy of metal ions in the two interstitial sites affects the exchange interaction. The higher grain size and lower porosity have a positive impact on magnetic saturation which makes them applicable in recording media.

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“…Ferrites that contain iron oxide as a significant constituent are considered one of the crucial categories of magnetic materials. Magnetic ferrites have an enormous impact on broad range of applications in diverse areas such as electrical and electronic industries, microwave and satellite communications technology, digital recording devices, and biomedical [1][2][3][4][5][6]. eir versatile properties not only make them suitable for a wide range of applications but also make them appropriate materials as an alternative to the rear earth-based permanent magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Quenching on Microstructural and Magnetic Properties of Cu-Doped Mg-Ferrite

Poddar

Halder

Liba

et al. 2022

Advances in Condensed Matter Physics

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Mg1-xCuxFe2O4 (x = 0.0–0.5) was prepared by the double sintering ceramic method, which sintered at 1100°C and 1200°C for 3 hours and investigated for structural, microstructural, and magnetic properties as a function of the Cu content and cooling process. XRD analysis of 1100°C sintered samples revealed that all the samples were crystallized in a single-phase cubic spinal structure. The microstructural and magnetic properties of slow cooled (furnace-cooled) and fast cooled (quenched) Mg-Cu ferrites have been studied using the scanning electron microscope (SEM), vibrating sample magnetometer (VSM), and Mössbauer spectroscopy after sintering at 1200°C. Homogeneous coaxial grains did not form for any furnace-cooled samples, while for the quenched sample, homogeneous grains were clearly visible even without doping with Cu. Substantial grain growth was witnessed by the samples with higher copper content for both cooling conditions, whereas quenched samples possessed a smaller grain size compared to furnace-cooled samples. The saturation magnetization experienced a higher value for quenched samples compared to furnace-cooled samples with increasing Cu content except for x = 0.4. The sextet pattern of Mössbauer spectroscopy confirmed all the samples were ferromagnetic in nature. Chemical shift, quadrupole shift, hyperfine field, and site occupancy of Fe3+ were also obtained using Mössbauer spectroscopy.

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Dense ferrites and their applications

Cited by 22 publications

References 0 publications

Retrieval of Mercury from Wastewater as Stable Mercury Ferrite

Retrieval of Mercury from Wastewater as Stable Mercury Ferrite

Co-Precipitation Synthesis of ZNCF Nanoparticle and their Structure, Morphological, and Magnetic Properties Characterization

Study of the Effect of Quenching on Microstructural and Magnetic Properties of Cu-Doped Mg-Ferrite

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