巻号一覧
33 巻, 9 号
選択された号の論文の5件中1～5を表示しています
- |<
- <
- 1
- >
- >|
-
津留 壽昭, 小林 繁夫, 藤山 純一, 乾 忠孝1982 年 33 巻 9 号 p. 402-407
発行日: 1982/09/01
公開日: 2009/10/30
ジャーナル フリーCrCl3⋅6H2O and its three hydrated isomers, [Cr(OH2)6]Cl3, [Cr(OH2)5Cl]Cl2⋅H2O and [Cr(OH2)4Cl2] Cl⋅2H2O, were dissolved in formamide (FA), N, N-dimethylformamide (DMF) or dimethylsulfoxide (DMSO). And chromium (III) complex species formed were studied by absorption spectra measurements. The measured spectra were compared with those for [Cr(OH2)6] (ClO4)3 in the above solvents. It was found that all these chromium (III) compounds in FA form violet colored hexaaquochromium (III) ions, [Cr(OH2)6]3+, solvated more or less by FA molecules. In DMF, CrCl3⋅6H2O and its isomers dissolve as green colored dichlorotetraaquochromium (III) ions, [Cr(OH2)4Cl2]+, solvated by DMF molecules. Unlike these compounds, [Cr(OH2)6] (ClO4)3 dissolves in DMF as [Cr(OH2)6]3+ ions solvated by DMF molecules. In DMSO, CrCl3⋅6H2O and the its isomers form green colored [Cr(DMSO)4Cl2]+ ions, and [Cr(OH2)6] (ClO4)3 dissolve as green colored [Cr(DMSO)6]3+ ions.抄録全体を表示PDF形式でダウンロード (837K) -
長谷川 勲, 小林 秀彦, 松本 史朗, 向 正夫1982 年 33 巻 9 号 p. 408-413
発行日: 1982/09/01
公開日: 2009/10/30
ジャーナル フリーA new method of concentration of copper cyanide in a dilute rinsing water was studied by means of an electrodialytic method with ion exchange membranes was used. The concentration of both copper and cyanide in the modified rinsing water were redused under about 1/15 in batch electrodialytic apparatus with three compartments. Copper was transported through anion exchange membrane as cyano complexes of copper (I) and the transfer rate of cyano complexes of copper (I) was controlled with concentration boundary layer in the desalting compartment. The transfer rates of copper and cyanide were proportional to copper mole fraction in the desalting compartment. The range of pH 8-12 was suitable for this operation, and the transfer mole ratio of cyanide and copper was 3 which can be explained by the equilibrium theory on cyano complexes of copper (I) in the solution. The appearent current efficiency for cyano complexes of copper (I) decreased at high-current density owing to preferential transfer of hydroxide. The deposition of copper cyanide was caused by deficiency of free cyanide ion on the surface of anion exchange membrane in the stationary electrodialytic apparatus. This deposition was, however, avoidable with stirring solution.抄録全体を表示PDF形式でダウンロード (776K) -
後藤 文男, 菅沼 葉二, 逢坂 哲彌1982 年 33 巻 9 号 p. 414-420
発行日: 1982/09/01
公開日: 2009/10/30
ジャーナル フリーAn electroless Co-Ni-P plating bath has been developed for obtaining high density magnetic thin film disk media from the following viewpoint: plating bath control technique for mass production and the plated magnetic disk media stability. Magnetic thin films, plated from the developed ammonia-alkaline malonate-malate-succinate bath (A-MMS bath), have high coercivity (Hc=500-700 Oe) and high squareness (Br·Bs-1≥0.80 and S*≥0.83). The magnetic film coercivity was highly uniform, standard deviation of He in one disk surface, σn=6.8 Oe. It was found that metal ion impurities in the bath influence the magnetic properties reproducibility and bath stability in mass production. Thus, the mass production of magnetic disk was carried out by controlling the impurities in the bath. Variations in magnetic properties, for disk media plated from A-MMS bath, with variations in time, temperature and heat treatment, were investigated. Consequently, the magnetic disk media obtained from A-MMS bath were confirmed to have adequate stability for practical use.抄録全体を表示PDF形式でダウンロード (997K) -
三田 郁夫, 山田 翠1982 年 33 巻 9 号 p. 421-426
発行日: 1982/09/01
公開日: 2009/10/30
ジャーナル フリーAluminum specimen (purity 99.8%) was anodized at 30 to 80°C with a constant voltage of 150V in sodium carbonate electrolyte, with or without sodium fluoride, sodium chloride and sodium iodid. Linear shape of sparking was observed in each electrolyte. White oxide coatings was formed on aluminum and was a highly porous under the scanning electron microscope. The spectral analysis showed that neither carbonate ion nor free radicals were incorporated in the coatings. Large amounts of fluoride and sodium were present on the surface layer of the coatings which is formed in sodium carbonate electrolyte with sodium fluoride. The coatings was found to have a high crystallinity and was identified as eta alumina by x-ray analysis.抄録全体を表示PDF形式でダウンロード (2061K) -
安田 誠之, 小浦 延幸1982 年 33 巻 9 号 p. 427-432
発行日: 1982/09/01
公開日: 2009/10/30
ジャーナル フリーA study has been made experimentally and theoretically to clear the relation between the anomalous codeposition of Ni-Fe and the pH change near the cathode. The pH change was measured with Sb microelectrode. The Dahms' equation was applied to estimate the pH change for the solutions containing Fe2+ or Ni2+. Partial polarization curves for Fe and Ni depositions and H2 evolution were also obtained by the aid of an atomic absorption spectrometry of the deposits. As a result, it was found that the equation is valid in the solution containing Fe2+ or Ni2+, and that the anomalous codeposition occurres only when the pH near the cathode rises up to neutral region. In the case of anomalous codeposition, the nickel depositing potential shifted towards negative by more than 100mV, while that of iron shifted towards positive by 100-200mV.抄録全体を表示PDF形式でダウンロード (732K)
- |<
- <
- 1
- >
- >|