نتایج جستجو برای: copper ferrite
تعداد نتایج: 89370 فیلتر نتایج به سال:
The particles of ferrite Ni0.6-xCuxZn0.4Fe2O4, (0-0.5 in step with 0.1) were prepared by the sol-gel method. Sintering process of powders was carried out at 600, 800 and 1000 oC. The effect of the sintering temperature and chemical composition on the structural and magnetic properties of the Cu substituted NiZn ferrite was investigated. EDS analysis and X-ray diffraction patterns confirmed a w...
The polycrystalline aluminium substituted nanoparticle size copper cobalt ferrite samples CuxCo1-xFe2-2yAl2yO4 (where x= 0.0, 0.2, 0.4, 0.6, 0.8, 1.0; y = 0.05, 0.15 and 0.25) have been prepared by standard ceramic technique. The lattice constants of the phases are evaluated from x-ray diffraction data. The effects of Al on both AC and DC Electrical properties are studied. DC Electrical resisti...
A method in combination of acid leaching, chemical exchange and ferrite process was applied to recycle copper and confer higher chemical stability to the sludge generated from etching process in printed circuit board industry. Ninety-five percent copper could be recycled in the form of powder from the sludge. Moreover, not only the wastewater after chemical exchange can be treated to fulfill th...
The bare and pre-oxidized AISI 430 pieces were screen printed by copper ferrite spinel coatings. Good bonding between the coating and the substrate was achieved by the reactive sintering process of the reduced coating. The energy dispersive X-ray spectroscopy (EDS) analysis revealed that the scale is a double layer consisting of a chromia-rich subscale and an outer Cu/Fe-rich spinel. The result...
in this work, we developed a method which combined the processes of acid-leaching, ammonium jarosite precipitating and electro-depositing to recover copper and nickel from electroplating sludge. residual sludge from an electroplating plant located in qingdao was used for acid-leaching, and more than 95% of copper, nickel, zinc, chromium and iron were extracted from the sludge. after acid-leachi...
In this study, Copper substituted Ni-Zn ferrite nanoparticles with compositions of Ni0.65Zn0.35CuxFe2-xO4 x= (0, 0.05, 0.1, 0.12, 0.15, 0.18, 0.2) were prepared by a polyvinyl alcohol (PVA) sol–gel process and the structural and magnetic properties of the samples were investigated by various analysis. Results obtained from X-ray diffraction (XRD) showed that the lattice parameter a...
The bare and pre-oxidized AISI 430 pieces were screen printed by copper ferrite spinel coatings. Good bonding between the coating and the substrate was achieved by the reactive sintering process of the reduced coating. The energy dispersive X-ray spectroscopy (EDS) analysis revealed that the scale is a double layer consisting of a chromia-rich subscale and an outer Cu/Fe-rich spinel. The result...
The amino acid condensation reaction on a heterogeneous mineral surface has been regarded as one of the important pathways for peptide bond formation. Keeping this in view, we have studied the oligomerization of the simple amino acids, glycine and alanine, on nickel ferrite (NiFe₂O₄), cobalt ferrite (CoFe₂O₄), copper ferrite (CuFe₂O₄), zinc ferrite (ZnFe₂O₄), and manganese ferrite (MnFe₂O₄) nan...
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