TANSO
Online ISSN : 1884-5495
Print ISSN : 0371-5345
ISSN-L : 0371-5345
Volume 3, Issue 2
Displaying 1-8 of 8 articles from this issue
  • Keiichi Watanabe, Kenji Nakahara
    1953 Volume 3 Issue 2 Pages 42-48
    Published: May 04, 1953
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
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  • Hideo Akainatu, Yoshio Matsunaga
    1953 Volume 3 Issue 2 Pages 49-52
    Published: May 04, 1953
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    The reason for the large diamagnetic anisotropy of graphite can be attributed to the circulation of the π-electrons in the network planes of carbon atoms under the magnetic field. It can be assumed that the diamagnetic anisotropies of the carbonized materials increase with increasing the aromatic condensation, in cosequence, the mass susceptibilities do. Therefore, the magnetic susceptibility can be used for the measure of the degree of the carbonization or of the graphitization.
    The magnetic susceptibilities of the commercial carbon blacks and carbon brushes were measured, and the results are shown in Table 1 and 2, respectively . The increase in the magnetic susceptibility by the heat treatment were observed for soot and pitch cokes, the results are shown in Fig. 1.
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  • Tokiti NODA, Shinya SATO
    1953 Volume 3 Issue 2 Pages 52-55
    Published: May 04, 1953
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    Several commercial carbon brushes were examined by X-ray powder method. Unit cell dimensions, crystal sizes, intensity ratios of X-ray reflexions and so called “Crypticpore ” of graphite crystallites were determined. Degrees of graphitization of the brushes were discussed with these data. Details of the experment and discussion were reported on the Bulletin of the Cnemical Society of Japan, vol.25, p 195-198, (1952).
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  • Kunio Hayashi
    1953 Volume 3 Issue 2 Pages 56-59
    Published: May 04, 1953
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    The properties of the carbon pile are mentioned here. The resistance R is approximately given in the form R=nC/Pm; where n is the number of carbon piles C & m are the constants and P is the applied force. The resistance of the carbon pile having 1/N times the above area can be calculated by the formula R= (nCN1-m) /Pm. If we decrease the compressive force from the maximum value Pmax to the lower value P. then the car bon discs expand by the amount χ. There exists the following relation between them; P=Pmax10-χ/nk, where k is a constant. And the method of measuring the resistivity, perpendicular to the surface is mentioned.
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  • Graphite-bromine Complex.(1)
    Genkichi Ichinose, Masaichi Kawasaki
    1953 Volume 3 Issue 2 Pages 60-64
    Published: May 04, 1953
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
    On the pitch cokes of different origins baked upto a defined temperature, quantity of bromine captured by them were determined and discussed.
    The least capture quantity of bromine always appeared in the pitch cokes treated upto 1600°C on all sort of them. The fact indicate that essential carbon crystal arrangement begin from this point. As baking temperature approacing upto nearly 2000°C, bromine capture quickly increased. It shows increase of bromine graphite formation depend on growth of the net plane of graphite lattice.
    Carbons of fine crystallites, as soot, lesser bromine graphite formation even if baking upto a sufficient high temperature. Amount of bromine capture by carbons somewhat decrease over some sufficient high temperarure baking. The fact probably due to loss of activity by improvement of crystallite arrangements.
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  • Rheology of thes everal Tar-Pitches
    SUSUMU SONODA, KAZUYOSHI OGINO
    1953 Volume 3 Issue 2 Pages 64-67
    Published: May 04, 1953
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
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  • H. Eyring, F.W.M. Cagle
    1953 Volume 3 Issue 2 Pages 68-71
    Published: May 04, 1953
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1953 Volume 3 Issue 2 Pages 72-76
    Published: May 04, 1953
    Released on J-STAGE: June 28, 2010
    JOURNAL FREE ACCESS
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