Shinku
Online ISSN : 1880-9413
Print ISSN : 0559-8516
ISSN-L : 0559-8516
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Volume 48, Issue 6
Displaying 1-7 of 7 articles from this issue
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Special Issue: Most Advanced Technologies Correlating to Directive of the European Parliament on the Restriction of the Use of Certain Hazardous Substance
Reviews
Regular Papers
Article
  • Development of Local and Real-time Concentration Measuring Method for Ozone Gas
    Yosuke SATO, Tetsuya NISHIGUCHI, Hidehiko NONAKA, Shingo ICHIMURA, Yos ...
    2005 Volume 48 Issue 6 Pages 378-381
    Published: 2005
    Released on J-STAGE: August 11, 2006
    DOIhttps://doi.org/10.3131/jvsj.48.378
    JOURNAL FREE ACCESS
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    A local and real-time concentration measuring method for high concentration ozone gas has been developed. The method employs Quadrupole Mass Spectroscopy (QMS) calibrated by low-temperature Thermal Desorption Spectroscopy (TDS). It was impossible to estimate the local ozone concentration by sampling the exhaust gas from the evacuation line. Using the passivated line, ozone concentration at a desired sampling point could be measured directly by the present method. The usefulness of the method was demonstrated by measuring ozone concentration at two particular points in oxidation chamber to be 23% and 40%.
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Letters
  • Morphological Studies on Carbon Nitride Films Deposited by Sputtering and Laser Ablation
    Toshiaki YASUI, Takayo KOTANI, Kenji FUJIUCHI, Hirokazu TAHARA, Takao ...
    2005 Volume 48 Issue 6 Pages 382-385
    Published: 2005
    Released on J-STAGE: August 11, 2006
    DOIhttps://doi.org/10.3131/jvsj.48.382
    JOURNAL FREE ACCESS
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    Carbon nitride films were deposited by reactive sputtering process and by pulsed laser ablation process with substrate bias. The atomic composition ratio of N/C and sp3 bonding ratio increased with substrate bias voltage up to 100 V. The maximum atomic composition ratio of N/C was 0.35 for reactive sputtering and 0.24 for laser ablation. However, the hardness of the films is high for reactive sputtering, and low for pulsed laser ablation. From the FE-SEM and TEM observation, the morphology of the films had dense structure by reactive sputtering and nano-size columnar structure with uneven surface by pulsed laser ablation.
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  • Formation Mechanism of Crack and Pore Occurred in a Zirconia Electrolyte Film Having Solid Oxide Fuel Cell Grown by ECR Plasma CVD Method
    Makoto SEMIZO, Tomoaki MIICH, Akiyoshi NAGATA
    2005 Volume 48 Issue 6 Pages 386-389
    Published: 2005
    Released on J-STAGE: August 11, 2006
    DOIhttps://doi.org/10.3131/jvsj.48.386
    JOURNAL FREE ACCESS
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    Formation mechanism of a crack and pore occurred in zirconia electrolyte film having solid oxide fuel cell, that the film prepared by the microwave plasma-enhanced chemical vapor deposition, was studied based on dependence on annealing treatment and substrate temperature. It is found that a crack and pore is restrained at annealing treatment in a vacuum, although it occurs in atmospheric. A crack is formed at grain boundary by occurrence of pore in the film, and a large crack observes at a higher substrate temperature. Moreover in the film prepared without substrate heating, a crack and pore did not also occur at annealing treatment. As a result, it is supposed that formation of a crack and pore is occurred at getting oxygen gas or moisture in atmospheric into the film.
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  • Hydrogen-Induced Lattice Relaxation Effects on the Absorption and Desorption of H on a Li(100) Surface
    Nelson B. ARBOLEDA Jr., Hideaki KASAI, Wilson A. DIÑO, Hiroshi ...
    2005 Volume 48 Issue 6 Pages 390-393
    Published: 2005
    Released on J-STAGE: August 11, 2006
    DOIhttps://doi.org/10.3131/jvsj.48.390
    JOURNAL FREE ACCESS
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    Here, we investigate and discuss the effects of H-induced lattice relaxation on the H absorption into (desorption from) a Li(100) surface. Using the coupled-channel method via the local reflection matrix scheme, we performed quantum dynamics calculations to obtain the H absorption and desorption probability plots as functions of the H initial translational energy and the Li initial vibrational state. Our results show that the hydrogen motion and the surface lattice relaxation are dynamically coupled and, depending on the initial conditions, the surface lattice motion either promotes or hinders the penetration of hydrogen into (desorptin from) the surface (subsurface). At low initial translational energy of H, the Li lattice has sufficient time to relax effectively reducing the energy barrier for H absorption and desorption.
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