trontium hexaferrite (SrFe 12 O 19 ) nanosized powders were synthesized by sol-gel auto-combustion method with and without cetyltrimethylammonium boromide (CTAB) addition in the sol with Fe/Sr ratio of 11 (using additional Sr). The resultant powders were investigated by X-ray Diffraction (XRD), Transmission Electron Microscope (TEM), Field Emission Scanning Electron Microscope (FESE...

Homogeneous charge compression ignition (HCCI) seems to be the most promising solution for gasoline engines in the light of future emissions regulations. This novel combustion technique allows for significant reduction of fuel consumption and engine-out NOX emissions at low and medium engine load/speed conditions. High heat release rate enables realization of the Otto cycle close to ideal, incr...

Calcium doped nickel ferrite powders have been prepared by sol-gel combustion technique. Metal nitrates, such as calcium nitrate, nickel nitrate and ferric nitrate, were used as the source materials and citric acid and polyvinyl alcohol were used as the burning agent and agglomeration reducing agent, respectively. The average crystallite size of the prepared ferrite was in the order of ~70- 92 ...

Calcium doped nickel ferrite powders have been prepared by sol-gel combustion technique. Metal nitrates, such as calcium nitrate, nickel nitrate and ferric nitrate, were used as the source materials and citric acid and polyvinyl alcohol were used as the burning agent and agglomeration reducing agent, respectively. The average crystallite size of the prepared ferrite was in the order of ~70- 92 ...

Abstract The effect is reported of substituting the non-magnetic Zn 2+ cations with magnetic Ni cations, and Fe 3+ Al in Ba 0.5 Sr 1.5 11.92 0.08 O 22 on resulting properties. Y-type hexaferrite powders were synthesized by citric acid sol-gel auto-combustion, followed appropriate thermal annealing. saturation magnetization values ( M s ) a field 50 kOe 36 emu/g 30 at 4.2 K 300 K, respectively. ...

The role of iron in two modes of integration into alumina catalysts was studied at 0.39 wt% Fe and tested in trichloroethylene combustion. One modified alumina was synthesized using the sol-gel method with Fe added in situ during hydrolysis; another modification was performed using calcined alumina, prepared using the sol-gel method and impregnated with Fe. Several characterization techniques w...

Metal oxide photocatalyst is a promising wastewater treatment process due to its simplicity, high efficiency, and low cost, as well being environmentally friendly non-energy consuming. The perovskite structure material, SrTi1?xNbxO3 (STNO) with x = 0, 0.01, 0.03, 0.05, was successfully synthesized by the sol-gel auto-combustion method. Samples pure phase cubic were obtained. Rietveld refinement...

Ni and La substituted M-type Ca hexaferrite of composition CaNi1Fe11O19 CaLa1Fe11O19 were synthesized by sol-gel auto combustion method using metal nitrates as oxidants citric acid reducing agent. The prepared samples characterized X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), energy dispersive analysis (EDAX), vibrating sample magn...