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 33, Issue 7
Displaying 1-10 of 10 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • A Gradational Packing Using Fluidization for Functional Materials
    Zennosuke TANAKA, Yasuaki TUJI, Teruo TAKAHASHI
    1996 Volume 33 Issue 7 Pages 542-546
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.542
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this study, a gradational packing method for functional materials in a fluidized bed to make functionally gradient materials was examined to develop a manufacturing process for new composite materials. The feature of this approach is that the fractional contents of the material are gradually changed. Functionally gradient materials can be developed because sudden changes, such as bonding materials or plating, do not exist. This packing method of functionally gradient materials using such a new technique utilizes the characteristic of the powder. In this study, the operational conditions of various gradational packing methods are proposed to produce functionally gradient materials in a fluidized bed.
    View full abstract
    Download PDF (454K)
  • Dust Properties and Char Recovery Cyclone as Factors in the Pressure Loss of Ceramic Candle Filters in Hot Coal Gas Filtration
    Shigeo ITO, Takashi TANAKA, Satoshi KAWAMURA
    1996 Volume 33 Issue 7 Pages 547-552
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.547
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Dust properties, determined in part by char recovery, are major factors in the pressure loss of ceramic candle filters applied to hot coal gas cleaning. A cyclone was applied to char recovery to investigate its effects on dust properties at 1.67-1.87MPa and 573-723K. After the cyclone, dust concentration was continuously monitored.
    Dust concentration entering the filters increased intermittently because of the reentrainment of the particles from the cyclone. The particles blown up during char discharging from the cyclone hopper affected measurement of the dust concentration.
    The cyclone decreased the dust concentration entering the filter from 60 to 3g/m3N but was unsuccessful in lowering filter pressure loss. The cyclone collected larger particles and increased their specific surface area with consequent ineffectiveness in pressure loss reduction in the dust cake.
    View full abstract
    Download PDF (2051K)
  • Quantitive Evaluation and Control of Delamination and Change in the Physico-chemical Properties of Talc by Wet Grinding
    Kenji HAMADA, Shin-ichi YAMAMOTO, Mamoru SENNA
    1996 Volume 33 Issue 7 Pages 553-558
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.553
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Delamination and changes in the physico-chemical properties in the grinding of talc were studied using a multi-ring media grinding machine. Products were characterized by SEM, specific surface area, St and aspect ratio, As, determined from the Heywood diameter and thickness measured by a confocal scanning laser microscope. The change in the physico-chemical properties were examined by thermogravimetry and X-ray diffractometry. As and St increase with the increasing rate of revolution. The former levels off at above ca. 1000min-1, while the latter keeps increasing. When the St of products exceeds three times that of the starting material, the crystal structure and the physico-chemical properties of talc change remarkably, indicating the change from the delamination region to the size reduction region. The change between these two operational regions is shown to be controlled by selecting the grinding condition.
    View full abstract
    Download PDF (1847K)
  • The Design of Inhalation Dry Powders by the Surface Modification of Drug Particles
    Takanori SERIGANO, Tomoaki HINO, Hiromitsu YAMAMOTO, Hirofumi TAKEUCHI ...
    1996 Volume 33 Issue 7 Pages 559-563
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.559
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A method for particle design to prepare a dry powder for inhalation was newly developed by the surface modification of poorly inhaled hydrophobic cohesive drug particles, e. g., pranlukast hydrate (PH, D50=2.1μm) with hydrophilic submicronized particles, e. g., colloidal silica (D50=16nm) and hydroxypropylmethylcellulose phthalate (HP-55) nanospheres (D50=51.6nm) prepared by the authors. The surface modification was carried out by compounding the drug and additive particles under shear with a manually operating mortar, the particle designing equipment (a Theta composer), and by freeze drying the dispersion of the drug and additives. The surface of PH particles were modified with colloidal silica (20%) by the Theta composer and HP-55 nanospheres (2-20%) by a freeze dryer, which dramatically improved the inhalation properties of the original PH particles. In addition, surface modified PH powders with HP-55 nanospheres significantly improved the dispersibility and dissolution rate of the drug in an aqueous media which is preferable for improving the bioavailability of the drug deposited in the bronchi.
    View full abstract
    Download PDF (2013K)
  • Size Destribution Characteristics of Glass Beads for JIS Z 8901 Test Powders and Test Particles
    Ken-ichi YAMASHITA, Kazumi FUKUTOME, Katsuyasu AIKAWA
    1996 Volume 33 Issue 7 Pages 564-569
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.564
    JOURNAL FREE ACCESS
    Download PDF (2202K)
  • [title in Japanese]
    Tatsuo TANAKA
    1996 Volume 33 Issue 7 Pages 570-571
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.570
    JOURNAL FREE ACCESS
    Download PDF (140K)
  • [title in Japanese]
    Manabu SHIMADA
    1996 Volume 33 Issue 7 Pages 591-596
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.591
    JOURNAL FREE ACCESS
    Download PDF (1974K)
  • [title in Japanese]
    Kuniaki GOTOH
    1996 Volume 33 Issue 7 Pages 597-598
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.597
    JOURNAL FREE ACCESS
    Download PDF (277K)
  • [title in Japanese]
    Ken-ichi YOSHIE
    1996 Volume 33 Issue 7 Pages 599-600
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.599
    JOURNAL FREE ACCESS
    Download PDF (257K)
  • [title in Japanese]
    [in Japanese]
    1996 Volume 33 Issue 7 Pages 601
    Published: July 10, 1996
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.33.601
    JOURNAL FREE ACCESS
    Download PDF (115K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top