TANSO
Online ISSN : 1884-5495
Print ISSN : 0371-5345
ISSN-L : 0371-5345
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Volume 1, Issue 3
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1950 Volume 1 Issue 3 Pages 2-4
    Published: July 30, 1950
    Released on J-STAGE: August 13, 2012
    DOIhttps://doi.org/10.7209/tanso.1.3_2
    JOURNAL FREE ACCESS
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  • Study on Graphite Crucible (1)
    Toshiyoshi Yamauchi, Hiroshige Suzuki
    1950 Volume 1 Issue 3 Pages 97-102
    Published: July 30, 1950
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1.97
    JOURNAL FREE ACCESS
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    The object of this is to compare the various properties of domestic graphite crucibles with those of the English Morgan's.
    Chemical analysises were carried out in oder to reveal the content of carbon in these crucibles together with the chemical composition of their ashes, .
    Load test and thermal expansion test at high temperature were also performed. The speeds of combustion in some ten specimens of natural graphites were measured, while the consuming property of graphite crucibles by oxidation were also investigated.
    Brief results are as follows. Domestic P.L. crucibles are excellent in heat coductivity, but they are inferior to the English Morgan's in the consuming property by oxidation.In other physical and mechanical properties, the domestic graphite crucibles were seem to be inferior also.
    To make them sufficient improvements, it is desirable to study the bonding materials from the view-points of ceramic engineering.
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  • Physical Properties of the Carbon Resistor used for Strain Measurement.
    Masayuki Ikui
    1950 Volume 1 Issue 3 Pages 103-109
    Published: July 30, 1950
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1.103
    JOURNAL FREE ACCESS
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    The carbon resistors made of the graphite and the synthetic resin are often used for strain mersurement.In this paper their physical properties which were underwritten were studied.
    1.The change of the specific resistance by the moulding.
    2.The change of the resistance by the strain.
    3.The temperature effect.
    4.The current effect.
    5.The effect of the repeating strain.
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  • Report II on the Results of Tests of Home-made Brushes as Compared with NCC 258.
    Tetsuro Akanuma
    1950 Volume 1 Issue 3 Pages 107-113
    Published: July 30, 1950
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1.107
    JOURNAL FREE ACCESS
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    This paper is a report on the results put together of the comparative tests of various kinds of brushes which were formerly made public in this journal (Vol.1, No.1)
    The tests were carried out with actual electricars or elebtric locomotives.The conciusion drawn from the reults is as follows:
    1.The home-made brushes can stand comparison with NCC 258, some of them showing some what better results.
    2.It seems that the home-made brushes are less uniform in wear and other respects than NCC 258.
    3.The ratios of failures of both kinds of brushes are much the same.
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  • Studies on manufacture of electric carbons V.Oxydation of carbons with sulfhric acid-Potassium dichromate mixture.
    Genkichi Ichinose
    1950 Volume 1 Issue 3 Pages 114-117
    Published: July 30, 1950
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1.114
    JOURNAL FREE ACCESS
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    Conditions of wet oxydation degree determination of carbons with sulfuric acid-potassium dichromate mixture were discussed.
    Suitable condition was as follows: -0.0500g puiverised carbon samples will be taken in a flask having a reflex condencer.Digested with mixture of sulfuric acid (d20 1.290) 50.0c.c.and K2Cr2O7 5.000g for 60min.at100°C, filtered with a weighed glass filter, washed throghly with distilled water, dried at 105°C to constant weight and then weighed.The increase of the filter considered as residual part of carbon of the sample.
    As the growing of graphite crystals of carbon articles, decrement of wet oxydation degfee was observed.The variation of wet oxydation degree have mutual resemblance to the variation of the carbon crystal lattice constant ratio c/a.
    The oxydation of carbon with sulfuric acid-potassium dichromate mixture occurs only from surface of carbon particles.Oxydation by penetration of the agents between (ool) layer of carbon crystals could not considered.
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  • [title in Japanese]
    [in Japanese]
    1950 Volume 1 Issue 3 Pages 118-121
    Published: July 30, 1950
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1.118
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1950 Volume 1 Issue 3 Pages 122-129
    Published: July 30, 1950
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1.122
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1950 Volume 1 Issue 3 Pages 130-136
    Published: July 30, 1950
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.7209/tanso.1.130
    JOURNAL FREE ACCESS
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