TANSO
Online ISSN : 1884-5495
Print ISSN : 0371-5345
ISSN-L : 0371-5345
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Volume 1967, Issue 50
Displaying 1-8 of 8 articles from this issue
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  • Instantaneous Graphitization of Carbon by Electric Spark Discharge
    Kazuo Kobayashi, Hidemasa Honda
    1967 Volume 1967 Issue 50 Pages 2-7
    Published: September 10, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1967.50_2
    JOURNAL FREE ACCESS
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    The effect of electric spark discharge on graphitization of carbon was investigated using three different types of heat treated carbon such as petroleum coke, pitch bonded petroleum coke carbon, and Akabira coal carbon. All these heat treated carbon samples were graphitized instantaneously by electric spark discharge with charging energy of 4600 Joule. The change of the graphitization degree was investigated by determining the interlayer spacing d and crystallite thickness, Lc and La, by X-ray diffraction. The interlayer spacing d of petroleum coke and pitch bonded petroleum coke pre-heat-treated over the range from 1000°C to 2800°C decreased to 3.36-3.37Å. Akabira coal carbons after discharge show composite (002) profiles with d spacing of 3.36Å and 3.42Å. It was found that degree of graphitization was more remarkable on the sample pre-heat-treated at lower temperature for petroleum coke and pitch bonded petroleum coke carbon, and that it was also remarkable on the sample pre-heat-treated at 1600° and 2000° for Akabira coal carbon.
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  • Studies on Stress
    Strain Relationships in Graphite
    Junichi Kon, Masayuki Katase, Kenjiro Murata
    1967 Volume 1967 Issue 50 Pages 8-14
    Published: September 10, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1967.50_8
    JOURNAL FREE ACCESS
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    The stress-strain relationships for several commercial artificial graphites in compression have been studied. These stress-strain relationships have been found to satisfy the following empirical formula up to the breaking point:
    ε=Bσ/So-A (O≤σ≤So)
    where σ is compressive stress, ε is strain, So is compressive strength and A and B are constants determined according to the specimen. It was shown that the apparent modulus of elasticity decreases linearly with increasing stress.
    And the relationship between the young's modulus and the compressive strength was discussed in the above equation. A plasto-elasticity model was put forward which describes the experimental results of stress-strain behavior, and the stress-strain relationship on stress cycling was derived theoretically from this model.
    The experimental results on stress cycling were then compared with theoretical values.
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  • On Relations between Macroscopic Structure and Physical Properties of Artificial Graphite
    A Semi-theoretical Discussion on the Effect of Binder Pitchby
    Yasushi Takeuchi
    1967 Volume 1967 Issue 50 Pages 14-19
    Published: September 10, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1967.50_14
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    Studies have been undertaken to clarify the relations between macroscopic structure and physical properties of pitch-bonded graphitic carbon, and especially the effect of binder pitch and its proportion on the physical properties were discussed.
    Semi-empirical equations are obtained and a fairly good agreement with the author's previous results is shown.
    These equations show that properties of both filler and binder coke, and binder pitch proportion are responsible to the determination of properties of graphite, and more studies are needed for the perfect understanding of the properties.
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  • Erratum to : Decomposition of Graphite-Nitrate Lamellar Compound
    1967 Volume 1967 Issue 50 Pages 19
    Published: 1967
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.7209/tanso.1967.50_19
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  • [title in Japanese]
    [in Japanese]
    1967 Volume 1967 Issue 50 Pages 20-25
    Published: September 10, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1967.50_20
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  • [title in Japanese]
    [in Japanese]
    1967 Volume 1967 Issue 50 Pages 26-31
    Published: September 10, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1967.50_26
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1967 Volume 1967 Issue 50 Pages 32-39
    Published: September 10, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1967.50_32
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1967 Volume 1967 Issue 50 Pages 39-49
    Published: September 10, 1967
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1967.50_39
    JOURNAL FREE ACCESS
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