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SOFC composite materials were prepared from nanopowder mixtures of yttria stabilized zirconia - nickel oxide as anode and yttria stabilized zirconia - lanthanum manganite as cathode. The influence of particle size, pore former and sintering temperature on structure and properties of the electrode materials were investigated. The optimal conditions of full reduction of nickel oxide in anode materials...
A possible synthesis mechanism of magnetic nanoparticles nickel, prepared by chemical reduction with hydrazine hydrate in ethylene glycol was obtaind. On this basis, different modifiers were used to improve the surface condition of magnetic nanoparticals, resulting to the good dispersion and stability of magnetic nanoparticles and with being more easily outer coated. Then the shell material CdTe was...
Ni-Fe-SiC alloy is a promising material in the fabrication of micro actuator. Electrolytic codeposition technique was adopted in the deposition of Ni-Fe-SiC composite coating on stainless steel substrate, using nickel alloyed with iron as the binder phase and SiC as dispersed particles. The morphology analysis indicated that the deposit with SiC nanoparticles is level and compact and the crystal-planes...
Three-dimensional (3D) supercapacitors have been demonstrated using vertically aligned carbon nanotubes (CNT) arrays and electroplated nickel nanoparticles. Two significant achievements have been demonstrated in this work: (1) a unique and reliable vacuum-assisted electroplating methodology for the uniform deposition of nickel nanoparticles on CNTs up to 150 ??m in length, and (2) usage of pseudo...
Microporous silica-based materials SiO2-Al2O3-NiO with a predominant pore size in the range 8-20 Aring, prepared by the sol-gel method by variation in Ni2+ concentrations from 0 to 30 weight %, have been characterized by X-ray diffraction, X-ray photoelectron spectroscopy. The nature of the nickel centers has been studied by magnetic susceptibility measurements supported by the XPS and X-ray experiments...
The aim of this research is to conduct atomistic investigations of physical interaction analysis of nanoscale objects manipulation. The system consists of tip, particle and substrate. The manipulation tool moves with a constant speed while pushing the particle in a desired direction. The focus of the research is on ultra-fine metallic nanoparticles. To perform this research, Nose-Hoover dynamics and...
We report thermoelectric characterization of Bi2-xSbxTe3 (x = 0.5, 1.0, and 1.5) synthesized by a solvothermal method using DMF as solvent. For Bi2Te3, the size of the edge and thickness of the hexagonal nanoplatelets are 200-250 nm and 20-25 nm, respectively. Bi2Te3 nanosheets appear to grow epitaxially from the surface of the Te tubes, which forms in the first step and acts as the template for the...
Bulk nanostructured (Bi,Sb)2Te3 compounds and GeTe based amorphous/nanocrystal composites have been successfully fabricated by the combined hydrothermal/hot-pressing and quenching/annealing methods, respectively. The (Bi,Sb)2Te3 nanopowders synthesized by hydrothermal method exhibit a hollow-like structure. After hot-pressing, the nanoscale grains varying from tens to hundreds of nanometers were found...
Nanostructuring is one of the effective approaches to lower the thermal conductivity of materials. Nanostructured skutterudite-related compounds CoSb3, Fe0.5Ni0.5Sb3, Fe0.25Ni0.25Co0.5Sb3 and Te-doped CoSb3 were synthesized by a solvothermal route. The bulk materials were prepared by hot pressing or spark plasma sintering from the solvothermally synthesized nanopowders. The thermal conductivity values...
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