表面科学
Online ISSN : 1881-4743
Print ISSN : 0388-5321
ISSN-L : 0388-5321
4 巻 , 1 号
選択された号の論文の6件中1~6を表示しています
  • 高塩 治男
    1983 年 4 巻 1 号 p. 2-10
    発行日: 1983/03/01
    公開日: 2009/11/11
    ジャーナル フリー
    Recently, new ceramics which have superior properties have been developed, and ceramics have increased.
    In applications of ceramics, there are many cases where ceramics must be bonded to other materials, for example, to metals and plastics. Development of new bonding techniques have expanded the application field of ceramics.
    Bonding methods are classified into three system methods : solid-vapor, solid-liquid, and solid-solid. For example, these are the evaporation method, the CVD method, a method utilizing metal solder or oxide solder, and a solid-state bonding method.
    This paper discusses ceramics, the bonding methods of ceramics to metals, and the bonding mechanisms.
  • 宮崎 栄三, 梅野 聰
    1983 年 4 巻 1 号 p. 11-17
    発行日: 1983/03/01
    公開日: 2009/11/11
    ジャーナル フリー
    Surface properties of pure and brominated (SN) x crystals were studied by adsorption of Xe and Kr gases at 78K and by scanning electron micrographs. We first report on the surface area of (SN) x and (SNBry) x and its change with heating in vacuo when y is in the range 0.06 to 0.38. The surface area of the (SN) x crystal reaches 72m2/g, a value comparable to that of silica gels or other substrates used for metallic catalysts. When (SN) x was brominated, many projecting dewdrop-like patterns were observed on the surface and the surface area drastically decreased, i.e., from 72m2/g to 41m2/g at y=0.06. When the brominated (SN) x was heated at 70°C in vacuo, the projecting patterns disappeared and the surface area slightly recovered.
  • Hiroshige MATSUMOTO
    1983 年 4 巻 1 号 p. 18-25
    発行日: 1983/03/01
    公開日: 2009/11/11
    ジャーナル フリー
    Fischer-Tropsch synthesis on a fused iron catalyst has been investigated in both isothermal and temperature-programmed experiments. Rates of hydrocarbon formation increased proportionally with the increase in weight of the catalyst during synthesis. The carburization enhanced catalytic activity was almost completely retained despite repeated evacuations of the catalyst. The carburization was recognized as weakening the CO-Fe interaction and raising the surface concentration of the more weakly bound carbon species. From these points of view, it was concluded that the carburization of the fused iron catalyst contributed, not to the formation of the reaction intermediates, but to the development of the active surface for catalysis.
  • 田嶋 和夫
    1983 年 4 巻 1 号 p. 26-34
    発行日: 1983/03/01
    公開日: 2009/11/11
    ジャーナル フリー
    The adsorption of solute species in solutions at a vapor-liquid or a liquid-liquid interface is expressed in terms of relative adsorption according to the Gibbs convention. Experiments are described in which the adsorbed amount may be measured at the air-water and oil-water interfaces. It is shown that Gibbs adsorption isotherms derived the surface thermodynamic theory explain the observed isotherms measured by the the radiotracer method using tritiumlabelled non-ionic and ionic surfactants. In the oil-water system containing a surfactant, the pressure coefficient of the interfacial tension gives us a thickness parameter τ which denotes the distance between the Gibbs dividing surfaces for oil and water phases at the interphase. The physical interpretation of τ is discussed.
  • 富満 広, 鎌田 耕治
    1983 年 4 巻 1 号 p. 35-40
    発行日: 1983/03/01
    公開日: 2009/11/11
    ジャーナル フリー
    Crystal-melt interface behavior during the growth of Cu-base solid solutions by the Bridgman method is discussed on the basis of experimental evidence obtained by neutron diffractioon topography.
    Advantages of neutron diffraction topography for the characterization of large single crystals, such as dealt with in this paper, are emphasized.
    Evidence was odserved of extremely regular crystal growth along <100> directions, irrespective of the macroscopic growth direction. This contrasts with the previously believed {110} normal growth which is a conclusion of growth theory based on molecular kinetics at the solid-melt interface.
    In consequence, we believe that the kinetics at the interface is a minor factor in the meltgrowth of metal single crystals. Revised melt-growth theory should include both the <100> growth and the formation of the regular structure as evidenced by neutron diffraction topography.
  • 岩崎 裕
    1983 年 4 巻 1 号 p. 41-49
    発行日: 1983/03/01
    公開日: 2009/11/11
    ジャーナル フリー
    A review is made of angle-resolved electron spectroscopy wherein measurements are made of electrons scattered inelastically from a primary electron beam. The subject includes angle-resolved secondary emission spectroscopy and angle-resolved electron energy loss spectroscopy (AR-ELS). Electron reflection measurements are also discussed. These provide information equivalent to that obtained by angle-resolved secondary emission spectroscopy. Abruptness of an interface between an epitaxial overlayer and a single-crystal substrate can be observed in detail by the reflection measurements. Recent AR-ELS results from structure-sensitive surface-electronic structures on clean. Ag-deposited Si (111) surfaces are described.
feedback
Top