Journal of the Society of Powder Technology, Japan
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
Search
Advanced search
OR
Browse
Search
Volume 42, Issue 5
Displaying 1-8 of 8 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    Hisao Suzuki
    2005 Volume 42 Issue 5 Pages 311
    Published: May 10, 2005
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.42.311
    JOURNAL FREE ACCESS
    Download PDF (2386K)
  • Processing Parameters of Mechanically Obtained NiO/YSZ Composite Particles and their Relevance to Properties of Ni/YSZ SOFC Cermet Anode
    Kenji Murata, Takehisa Fukui, Hiroya Abe, Makio Naito, Kiyoshi Nogi
    2005 Volume 42 Issue 5 Pages 312-316
    Published: May 10, 2005
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.42.312
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    NiO/Y2O3-stabilized ZrO2 (YSZ) composite particles for solid oxide fuel cell (SOFC) anode was fabricated by an advanced mechanical method using an attrition type particle composing machine in dry ambient. In this study, two sets of composite particles with different mixing time were prepared. Structure of the composite particles was markedly influenced by the mixing time since the morphology of the resultant Ni/YSZ cermet anode changed with the mixing time. Then, the relationship between the structure of composite particles and the properties of the Ni/YSZ cermet anode were examined. When the composite particles processed with mixing time of 5min were used, the cermet anode showed lower electrical performance at both 800°C and 1000°C. On the other hand, the longer processed composite particles (30min) resulted in higher electrical performance. The difference of anode performances was explained by the change in cermet morphology associated with the mechanical processing time. These results suggested that the mechanical processing for NiO/YSZ composite particles significantly influenced SOFC anode performance.
    View full abstract
    Download PDF (4612K)
  • Numerical Analysis of Coal Ash Bed Hardening by Water Condensation
    Masashi Wada, Hideki Kanda, Mitsuhiko Hata, Hisao Makino, Chikao Kanao ...
    2005 Volume 42 Issue 5 Pages 317-323
    Published: May 10, 2005
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.42.317
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this study, hardening phenomena of coal ash beds in high-humidity condition are examined. We employ a diffusion simulation in clarifying the distribution of condensed water in coal ash beds, in which water vapor is absorbed into sulfur trioxide adhered on the surface of coal ash particles. Aqueous sulfuric acids solution formed by the absorption is in equilibrium with the ambient water vapor. The diffusion rate of water vapor is proportional to the difference between the pressure and ambient water vapor pressure. The simulation successfully describes the results of previous experiment, at a constant temperature, with the variations in the equilibrium moisture and particle diameter of coal ash. Moreover, it is clarified that the relationship between water content and hardening phenomena is very similar for various coal ashes, with a correction of particle diameter of coal ash and the volume of condensate bridging between particles.
    View full abstract
    Download PDF (821K)
  • Particle Design for Dry Powder Inhalation Using a Spouted Bed Type Binderless Granulation Method
    Shigenobu Hatano, Nobuyuki Nakamura, Nobusuke Kobayashi, Jun Kobayashi ...
    2005 Volume 42 Issue 5 Pages 324-329
    Published: May 10, 2005
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.42.324
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A new process for dry powder inhalation (DPI) using a spouted bed type binderless granulation for cohesive fine powders was investigated. The dry powder inhalation requires high flowability and dispersibility of powders so as to be dispersed easily into particles with 0.5 to 7μm in aerodynamic diameter during the inhalation. Actual medicines were used for the raw material in the granulation. The compressive strength of the granule measured by particle hardness tester GRANO was very small. The dispersibility of granules was measured by the cascade impactor. As a result, the produced granules by the granulation method had high dispersibility and the dispersion was satisfactory for DPI. Moreover, the median diameter of granules could be controlled by changing the initial sieving condition of raw powder.
    View full abstract
    Download PDF (4472K)
  • Effect of Cyclic Number of CIP of Silicon Nitride Granule Bed on the Properties of Resultant Ceramics
    Tadashi Hotta, Yohtaro Matsuo, Hiroya Abe, Makio Naito
    2005 Volume 42 Issue 5 Pages 330-332
    Published: May 10, 2005
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.42.330
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The effect of cyclic number of CIP of granule bed on the properties of green and its sintered body was examined. Two types of slurries were employed to make different properties of granules. Both granules were uni-axially pressed, dewaxed and then prepared by CIP. The green density increased with cyclic number of CIP. However, the density and fracture toughness of resultant ceramics were not influenced by the cyclic number of CIP. On the other hand, the fracture strength of ceramics increased with cyclic number of CIP. It was ascribed to the large defect in the sintered specimen.
    View full abstract
    Download PDF (2525K)
  • Inhalation Therapy in the Post-Genome Era
    Hirokazu Okamoto
    2005 Volume 42 Issue 5 Pages 333-341
    Published: May 10, 2005
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.42.333
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The lung is an attractive organ to administer proteins and peptides, which are poorly absorbed from the gastro-intestinal tract. Several chemicals and enzyme inhibitors have been examined as pulmonary absorption enhancers. A combination of insulin powder and citric acid powder showed improved hypoglycemic activity without deteriorating effect of citric acid on insulin stability. Supercritical fluids have recently been applied for producing powders for inhalation. The insulin powder prepared by supercritical carbon dioxide process significantly decreased blood glucose level without citric acid. The chitosan-pCMV-Luc dry powders administered intratracheally increased the luciferase activity in mouse lung compared with pCMV-Luc solutions. These results suggest that the supercritical carbon dioxide technique would be useful to prepare dry powder suitable for inhalation.
    View full abstract
    Download PDF (7478K)
  • Direct Measurement of Surface Forces in Liquids
    Measurement of Hydrophobic Attraction
    Naoyuki Ishida
    2005 Volume 42 Issue 5 Pages 342-346
    Published: May 10, 2005
    Released on J-STAGE: July 01, 2010
    DOIhttps://doi.org/10.4164/sptj.42.342
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Direct measurement of the interaction forces between solid surfaces in liquids has become an important technique in recent years for understanding the various microscopic phenomena that affect the behavior of fine particles in many industrial processes. The history and the development of the direct measurements of surface forces are briefly reviewed. As a practical example of the force measurements, a series of the investigations for hydrophobic attraction, which is the interaction between hydrophobic surfaces in aqueous solution, using an atomic force microscope is introduced.
    View full abstract
    Download PDF (4050K)
  • [title in Japanese]
    2005 Volume 42 Issue 5 Pages 356-357
    Published: May 10, 2005
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.42.356
    JOURNAL FREE ACCESS
    Download PDF (4764K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top