PREPARATION AND CHARACTERIZATION OF SURFACE CONTROLLED FUNCTIONAL MATERIALS USING NON-EQUILIBRIUM ALLOYS AS THEIR PRECURSORS

1. Ni catalysts supported by zirconia，which have high activity for the reaction for methanation of carbon dioxide with hydrogen，were prepared from amorphous Ni-Zr alloysand evaluated their activity in relation with alloy composition反应temperature.这是发现他们的活动，这是最高的，当他们已经预先存在Ni-Zr alloys containing Zr from 40 to 50at%Zr. The origin of The alloy composition dependence wasexplained by the alloy composition dependence of metallic Ni on the catalyst surface，turnover number,and the relative concentration of tetragonal zirconia in the support. On the base of the aboveresults,catalysts with higher activity were prepared by addition of a certain amount of Sm which causedstabilization of tetragonal phase of zirconia and increase of Ni dispersion on zirconia.2Non-equilibrium Nb-W和Nb-Mn alloys prepared by sputtering method.他们showed amorphousstructure within the composition range of 20-50at%W和26-75at% W…more mn,respectively. Their corrosion resistance and surface compositions were evaluated by electrochemicalmeasurements and photoelectron spectroscopy.3. Co-20at%Al alloy prepared by sputtering method was anon-equilibrium metallic compound with csc- type structure. When alloy films were prepared byreactive sputtering in N - 22 - D2 and O - 22 - D2 containing atmosphere，他们应该使用ferromagnetic property with high performance even at high frequency region. It wasclarified that the composed of nano-particles of Co surrounded by insulating AlN andD22 D2O D23 D24. Sr-Bi-Ta oxides prepared by sol-gel method followed by annealing at low temperaturesshowed no ferroelectric properties. But they become ferroelectric substance at high temperatureannealing. Their性能was， however，dependent on annealing temperature and atmosphere during annealing.这是制造清洁that deviationsurface composition from stoichiometry and existence of metallic Bi were和谐toferroelectric performance. Less

1. Ni catalysts supported by zirconia, which have high activity for the reaction for methanation of carbon dioxide with hydrogen, were prepared from amorphous Ni-Zr alloys, and evaluated their activity in relation with alloy composition, reaction temperature. It was found that their activity was highest when they have prepared from Ni-Zr alloys containing Zr from 40 to 50at%Zr. The origin of the alloy composition dependence was explained by the alloy composition dependence of dispersion of metallic Ni on the catalyst surface, turnover number, and the relative concentration of tetragonal zirconia in the support. On the base of the above results, catalysts with higher activity were prepared by addition of a certain amount of Sm which caused stabilization of tetragonal phase of zirconia and increase of Ni dispersion on zirconia.2. Non-equilibrium Nb-W and Nb-Mn alloys were prepared by sputtering method. They showed amorphous structure within the composition range of 20-50at%W and 26-75at% … More Mn, respectively. Their corrosion resistance and surface compositions were evaluated by electrochemical measurements and photoelectron spectroscopy.3. Co-20at%Al alloy prepared by sputtering method was a non-equilibrium metallic compound with CsCl-type structure. When alloy films were prepared by reactive sputtering in NィイD22ィエD2 and OィイD22ィエD2 containing atmosphere, they showed ferromagnetic property with high performance even at high frequency region. It was clarified that they were composed of nano-particles of Co surrounded by insulating AlN and AlィイD22ィエD2OィイD23ィエD2, respectively.4. Sr-Bi-Ta oxides prepared by sol-gel method followed by annealing at low temperatures showed no ferroelectric properties. But they become ferroelectric substance at high temperature annealing. Their performance was, however, dependent on annealing temperature and atmosphere during annealing. It was made clear that deviation of surface composition from stoichiometry and existence of metallic Bi were harmful to ferroelectric performance. Less