Mn–Zn ferrite powders (Mn0.5Zn0.5Fe2O4) were prepared by the nitrate–citrate auto-combustion method and subsequently annealed in air or argon. The effects of heat treatment temperature on crystalline phases formation, microstructure and magnetic properties of Mn–Zn ferrite were investigated by X-ray diffraction, thermogravimetric and differential thermal analysis, scanning electron microscopy a...

the hcci combustion process is initiated due to auto-ignition of fuel/air mixture which is dominated by chemical kinetics and therefore fuel composition has a significant effect on engine operation and a detailed reaction mechanism is essential to analysis hcci combustion. a single zone-model permits to have a detailed chemical kinetics modeling for practical fuels. in this study a single-zone ...

the mössbauer spectra of nanoferrite materials such as ni0.25mn0.75fe2o4, co0.5mn0.5fe2o4 and ni0.4co0.6fe2o4 have been reported and the above materials were prepared by sol-gel combustion method using metal nitrates as source material and polyvinyl alcohol(pva) as agglomeration reducing agent. as the structural, thermal and magnetic properties (vsm) of the above ferrites have been published al...

The effect of non-magnetic oxides such as Al2O3, TiO2 and ZnO on the microwave absorption properties magnetoplumbite barium hexaferrite (BaFe11.8Co0.2O19) is analyzed. Barium nanoparticles are synthesized through sol-gel auto-combustion method. BaFe11.8Co0.2O19-Al2O3, BaFe11.8Co0.2O19-TiO2 BaFe11.8Co0.2O19-ZnO composites in a 1:1 ratio mechanical mixing heat treatment. epoxy fabricated with 50%...

The color-tunable GdCaAl 3 O 7 : RE 3+ (RE = Eu, Tb, Eu@Tb) phosphors were synthesized via an ultrafast sol-gel auto-combustion synthesis method. X-ray diffraction patterns confirmed the forming of tetragonal phase, and scanning electron microscopy images indicated that obtained products presented honeycomb-like structure due to gas releasing during process. luminescent properties, concentratio...

a functional treatment for skeletal damages in orthopedic and oral maxillofacial surgeries is required. platelet growth factors such as platelet derived growth factor (pdgf), bone morphogenic factor (bmp), transferring growth factor-β (tgf-β) and insulin-like growth factor-1 (igf-1) proceed wound healing and bone regeneration. in the present study we focused on the effect of platelet rich plasm...