Production and characterization of pure and doped copper ferrite nanoparticles

Structural, morphological and magnetic properties of NiFe2O4 nano-particles

“…In addition, the difference in the positions and area of the absorption bands, 1 * and 2 * , is referred to change in the formation of nickel ferrite by glycine-nitrate process because the positions and intensities of the bands, 1 * and 2 * , depends strongly on the method and conditions of preparation [25]. On the basis of the above data the nickel ferrite compound has an inverse spinel structure and the cation distribution is as fol-…”

“…But the augmentation in the G/N ratio above this limit resulted in slightly increase in the peaks height of Ni-ferrite phase. The enhancement of ferrite formation due to the increase in the ratio of G/N had been attributed to an effective increase in the mobility of reacting cations taking part in the ferrite formation depending upon the rise in the reaction temperature [22,25]. This conclusion might find evidence from a progressive shift of the diffraction peaks of NiFe 2 O 4 to higher Bragg's angle with the rise in the G/N ratio.…”

In situ electrical conductivity and catalytic properties of copper ferrite synthesized by non-conventional methods

“…The hydroxides were coprecipitated using a NaOH (2 M) solution added to the sulfates solution under stirring. The precipitates were then gradually oxidized by bubbling air (air volume 1.1 dm 3 /min) at 80°C and pH * 11, for 8 h. The powder thus obtained was washed with distilled water up to the absence of SO 4 2-in the supernatant liquid. Then the precipitate was filtered and dried at 80°C for 24 h. The resulting powder was then ground and calcined in air at 800°C, for 2 h.…”

“…These materials can offer a range of technical and commercial advantages that make them a valuable alternative to noble metals [3]. Among them, ferrites widely used in other applications (computer peripherals, telecommunication equipments, permanent magnets, for electronic and microwave devices), have been used as active catalysts in various catalytic reactions, as hydrocarbon oxidation, oxidative dehydrogenation, decomposition of alcohols and peroxides and decarboxylation of some organic acids, electro-catalytic activity and resistance to corrosion [4].…”

SPİNEL FERRİT NANO-PARÇACIKLARININ HİDROTERMAL SENTEZ TEKNİĞİ KULLANILARAK HAZIRLANMASI ve MANYETİK ÖZELLİKLERİNİN ARAŞTIRILMASI

“…Bunlardan ilki 620-550 cm -1 aralığında gözlenen ve tetrahedral yapı içerisinde metal-oksijen etkileşimini gösteren geniş bant, ikincisi ise 450-385 cm -1 aralığında görülen ve oktahedral yapıdaki metal-oksijen bağını gösteren geniş banttır. [17,18] [19]. Elde edilen ferritlerin kristal yapıları XRD analizleriyle de denetlenmiştir.…”