巻号一覧
16 巻, 5 号
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喜利 元貞, 福田 克雄, 鈴木 十五郎, 和迩 秀信1968 年 16 巻 5 号 p. 197-206
発行日: 1968/04/30
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (1334K) -
鹿島 次郎, 久保田 正明1968 年 16 巻 5 号 p. 207-218
発行日: 1968/04/30
公開日: 2010/06/28
ジャーナル フリーEffects of addition of auxiliary elements upon the line intensities and the accuracy of analytical results are studied in the case of the spectrographic analysis of cast iron. A chipped sample of approximately 10 gr is put in a quartz or an alumina crusible with chromium, aluminum or copper, and is melted by a high frequency induction heater in argon atmosphere.Critically damped spark discharge between a graphite electrode and a sample electrode is used. The microstructure of the sample is examined prior to the analysis by an optical microscope.
Generally speaking, the spectral intensities of the elements contained in white cast iron increase gradually with the sparking time as shown in the intensity-time curves, while those in grey cast iron are large in the early period of sparking.It is observed that these tendency becomes weak by addition of 5% of tin or 1% of chromium plus 0.1% of aluminum.The similar effects are expected also in the case of addition of 1% of chromium.Chromium promotes a chilling tendency significantly, for cast iron having a high saturation degree.No influence is exerted on the intensity-time curves by addition of copper because it does not change the microstructure of samples.
Reproducibility of the analytical results is related with the shape of intensity ratio-time curve and therefore it is necessary for correct measurements to make a sample in such a way that gives a stable intensity ratio-time curve by addition of a proper auxiliary element. It is shown that the addition of 1% chromium is effective for the analysis of silicon, whereas that of 5% tin improves the accuracy of measurement for manganese.抄録全体を表示PDF形式でダウンロード (2979K) -
末高 治1968 年 16 巻 5 号 p. 219-224
発行日: 1968/04/30
公開日: 2011/02/23
ジャーナル フリーInfrared absorption spectra of thin films (about 0.1 μ thick) of maleic, malonic and L-tartaric acids and coumarin formed on metal plates were investigated by use of the polarized incident beam method.
All absorption bands of maleic acid except those due to out of plane vibrations disappeared in the thin film spectrum.This fact implies that maleic acid molecules have a planar structure and are parallel to the metal surface.Difference found between the spectra of films formed on Incoloy and on nickel shows that the crystal structure of thin film can change in changing the substrate metal.
The splitting of absorption bands observed in the spectra of malonic acid and coumarin films suggests that the crystal structures of these compounds in thin films may be different from those of bulk.The spectra of thin films formed on nickel plates from the aqueous solutions of dicarboxylic acids have not absorption bands due to original acids but those due to their carboxylate ions. The spectra of L-tartaric acid in amorphous thin films exhibits very broad OH bands, suggesting the existence of random intermolecular hydrogen bonding.抄録全体を表示PDF形式でダウンロード (842K) -
川村 和郎, 渡辺 俊雄, 渡辺 四郎, 森田 矩夫, 古川 洗1968 年 16 巻 5 号 p. 225-232
発行日: 1968/04/30
公開日: 2010/06/28
ジャーナル フリーA spectrochemical analysis was developed to determine trace impurities in pure iron. A sample was dissolved in acids, iron was removed by isopropylether extraction, and then the aqueous solution containing impurity elements was dried with graphite powder. The powder was mixed with lithium carbonate and examined by use of DC arc in argon-oxygen atomsphere with Stallwood jet. Ten elements (Mn, Cu, Ni, Cr, Al, Ti, V, Co, Zn and Cd) were found to be determined in the range of 0.1 to 100 ppm.抄録全体を表示PDF形式でダウンロード (874K)
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