نتایج جستجو برای: Autocombustion
تعداد نتایج: 47 فیلتر نتایج به سال:
Nanoporous iron metal foams were synthesized by an improved sol-gel autocombustion method in this report. It has been confirmed to be pure phase iron by X-ray diffraction measurements. The nanoporous characteristics were illustrated through scanning electron microscope and transmission electron microscope images. Very low density and quite large saturation magnetization has been performed in th...
A simple and efficient route to prepare supported nanocrystalline oxides is presented. The synthesis procedure, i.e. in situ autocombustion of a glycine complex, allows the production of nanocrystals in a porous matrix presenting larger pore size. An example of successful formation of 2-5 nm nanocrystals is given for a single oxide (Fe(2)O(3)), a mixed-oxide structure (LaCoO(3) perovskite-type)...
in this research, a sol gel autocaombustion route has been proposedto synthesize alumina-zirconia composite powders, usingammonium bicarbonate as a new fuel. then the effect of calcinationtemperature on phase transformation and crystallite sizes wasinvestigated. to characterize the products xrd, tem and betanalyses were used. xrd patterns of as-synthesized powder andcalcined powders at 1100 ◦c ...
Abstract In this study, we presented two reliable methods, the sol–gel and autocombustion, to synthesis a high purity BiFeO 3 single phase with low calcination time using glycine as chelating agent. The glycine-autocombustion method produced either or concentrations of reactants (Bi(NO ) + Fe(NO ), while glycine-sol–gel delivered reactants. case tartaric acid urea agents, mixtures Bi 25 FeO 40 ...
In this research, work nanopowders of Zn1-xMnxO (0.0) dilute magnetic semiconductor were prepared via sol-gel autocombustion method. The crystal structure and phase purity of samples were confirmed by X-ray powder diffraction (XRD) analysis. The particle sizes were found to be 5-35 nm from Transmission Electron Microscopy (TEM) and Scherer's formula. The hysteresis in the M-H behavior shows the...
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