The formation and physicochemical characterization of Al2O3-doped manganese ferrites

Deraz, N.M.

doi:10.1016/s0040-6031(02)00564-6

Cited by 21 publications

(23 citation statements)

References 12 publications

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“…17 Deraz prepared alumina-doped Mn/Fe oxide solids and studied their thermal behaviors and phase transformation processes. 18 Amini and co-workers synthesized aluminapolyaniline nanocomposites via a template-guided polymerization of aniline using alumina nanosheets and analyzed their conductivity and cyclic voltammetry. 19 Logar et al fabricated alumina-TiO 2 composites through an in-situ solgel reaction of TiO 2 precursor on the surface of alumina and investigated their photocatalytic activity.…”

Section: -13mentioning

confidence: 99%

Synthesis of Alumina-Grafted Manganese Oxide Particles Using Surfactants through Coprecipitation Method and Their Thermal Properties

Kwon¹,

Park²,

Jang³

et al. 2013

Bulletin of the Korean Chemical Society

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Alumina particles were grafted onto the surface of manganese oxide particles via the coprecipitation process using surfactant and cosurfactant. The phase of Mn/Al salts (Phase I) and the phase of precipitation agent (Phase II) were prepared in aqueous surfactant solution, separately. Phase II was added into Phase I and the reaction was performed to form the precursors of composites through hydrogen bonding between Mn(OH) 2 and Al(OH) 3 prepared by the reaction of Mn/Al salts with the precipitation agent. The alumina-grafted manganese oxide particles were obtained as a final product after calcination. The concentrations of Al salt and surfactant were varied to investigate their effects on the formation and the crystallinity of composites. In addition, the crystal structure of products could be controlled by changing the calcination temperature. Through thermal analyses, it was found that the thermal stability of manganese oxide was improved by the introduction of alumina on its surface.

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Section: -13mentioning

confidence: 99%

Synthesis of Alumina-Grafted Manganese Oxide Particles Using Surfactants through Coprecipitation Method and Their Thermal Properties

Kwon¹,

Park²,

Jang³

et al. 2013

Bulletin of the Korean Chemical Society

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“…This has been tentatively achieved from the height of characterized diffraction lines at 2.50 or 2.52 Å which provide a measure of the amounts of tetragonal and cubic CuFe 2 O 4 phases present in a given solid sample at a definite temperature (T). By plotting the peak height of these lines versus 1/ T, a straight line is obtained the slope of which determines DE f value by the direct application of the Arrhenius equation [17]. The computed DE f values of copper ferrite (cubic or tetragonal phases) were 150, 100 and 115 kJ mol À1 for pure mixed solids and those .…”

Section: Xrd Analysis Of Calcined Mixed Solidsmentioning

confidence: 99%

“…Direct reaction of the element or single binary compounds is the most widely used method for the preparation of polycrystalline ferrites [15][16][17][18]. For the reaction to proceed within a reasonable period of time, high mobility of the reactants is desirable as well as maximum contact surface between the reactive particles.…”

Section: Introductionmentioning

confidence: 99%

“…Several successful attempts have been done to simulate the ferrites formation via doping with certain foreign oxides [16][17][18][19]. In fact, it has been reported that Al 2 O 3 -doping enhanced the formation of manganese ferrites [17].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, it has been reported that Al 2 O 3 -doping enhanced the formation of manganese ferrites [17]. Additionally, ZnO and Li 2 O being added as dopants stimulated the formation of Mn and Cu ferrites [16,18].…”

Section: Introductionmentioning

confidence: 99%

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