Journal of the Spectroscopical Society of Japan
Online ISSN : 1884-6785
Print ISSN : 0038-7002
ISSN-L : 0038-7002
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Volume 15, Issue 1
Displaying 1-4 of 4 articles from this issue
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  • Relation between Microstructure and Emissions of Steels
    Taku HAGIHARA, Kanetoshi NARAKI, Kiyoyuki TANAKA
    1966 Volume 15 Issue 1 Pages 1-12
    Published: July 31, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.15.1
    JOURNAL FREE ACCESS
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    Emission spectrochemical analysis of steels is considerably affected by their metallurgical conditions. As a guide for elimination of this harmful effect in the quantovac analysis, a study is made concerning the relation between microstructure and emission of steels.The obtained results are the following:
    (1) The investigation of discharge craters showed that considerable preferential discharges occur on boundaries of crystal grains, inclusions and joined metals.Hence carbon spectrum line intensity varies by heat treatment of samples.The spectrum intensity of the internal standard line also varies to some extent by preferential discharges.
    (2) Relation between erosion rate and chemical composition of carbon steel, alloy steel and stainless steel is expressed by respective linear equations which show that C, Mn, Ni promote the erosion and Si, Cr, Mo diminish it.
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  • Spectral Measurements of Transparent, Translucent and Opaque Samples with Recording Spectrophotometer of Two End-On Photomultiplier Detector Type
    Hideki MAKABE, Takashi KURITA, Yoshio FUKUDA, Shichibei KOZAWA, Kazuo ...
    1966 Volume 15 Issue 1 Pages 12-23
    Published: July 31, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.15.12
    JOURNAL FREE ACCESS
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    A new versatile ratio recording spectrophotometer with double detectors has been developed for measurement of absorption spectra of any transparent, translucent or opaque materials in U .V.and visible region.Sharp absorption bands of translucent materials can be obtained by placing the sample and the refrence closely to the end-on photocathodes of photomultipliers to capture all of the transmitted light beams.In the measurements of opaque materials, the light diffusely reflected from the sample is captured by the detector, and the light specularly reflected on the surface is totally left out of measurement.One can thus obtain sharp absorption bands even of glossy meterials.The instrument accommodates both electronic and optical systems to measure highly dense materials and to set the base line of a spectrum on any level of the absorbance scale.The scale can be expanded to measure difference spectra precisely.
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  • Erosion of Various Metal Electrodes by Spark Discharge
    Tsutomu TAKAHASHI, Kouichi YOSHINO, Hiroshi MATSUI
    1966 Volume 15 Issue 1 Pages 23-28
    Published: July 31, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.15.23
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    The mechanism of cathode erosion by spark in argon atmosphere is discussed on the basis of Libin's idea.The cathode orosion occurs as a result of ion bombardment, giving rise to a vapour jet.The cathode erosion rate is almost the same as the value given by Libin's equation.
    On the other hand, the cathode erosion in active gas is suppressed by a chemical reaction on the electrode and its mechanism can not be exp1ained by Libin'sidea.
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  • Automatic Plate Racking Mechanism for the Spectrograph
    Hiroshi KAWAGUCHI
    1966 Volume 15 Issue 1 Pages 29-31
    Published: July 31, 1966
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.5111/bunkou.15.29
    JOURNAL FREE ACCESS
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