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Volume 5 (1978)
- Issue 4 Pages 139-
- Issue 3 Pages 95-
- Issue 2 Pages 57-
- Issue 1 Pages 2-
Volume 5, Issue 3
Displaying 1-6 of 6 articles from this issue
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Takayoshi Kimura, Sadao Takagi1978 Volume 5 Issue 3 Pages 95-99
Published: July 15, 1978
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSA small recirculation still of the Brown's type is modified by inserting a stopper against rising of liquid level and reverse flow and a small magnetic stirrer into the path before the boiler. Details of the modification and circulation technique suitable for determining the vapor-liquid equilibrium with relatively small charge, ca. 57cm3, are described. It is shown that consistent results can be obtained with the new still for the system benzene+cyclohexane at 313.15K.View full abstractDownload PDF (619K) -
Mitsuru Ikeda1978 Volume 5 Issue 3 Pages 100-106
Published: July 15, 1978
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSA new calorimeter enabled to measure the heat of bulk-photopolymerization reaction and to discuss kinetics of the reaction. The apparatus equipped with an irradiation unit belonged to a twin and thermal-leak type of calorimeter, and had the sensitivity of 0.63μJs-1. It was used to kinetically analize bulk-photopolymerization processes of lauryl acrylate and lauryl metacrylate. Their processes were different distinctly. Also, a kinetic result on the photopolymerization system containing two initiators of aromatic ketone- and amino-compounds suggested the formation of exciplex between them.View full abstractDownload PDF (840K) -
Yasutoshi Saito, Yutaka Shinata, Junzo Wakaki, Makoto Yamada1978 Volume 5 Issue 3 Pages 107-116
Published: July 15, 1978
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSHydrous alumina gels and amorphous alumina were aged in water at 70°C for a long period, and the gels in part were hydrothermally treated at temperatures from 100° to 180°C for 5h. The gels were prepared by adding ammonia water to an aqueous solution of aluminium chloride. Amorphous alumina was obtained by calcining aluminium chloride at 600°C for 10h. The water-to-sample ratio and stirring were adopted as principal variables in aging experiments at 70°C. Aged products were examined by X-ray diffraction, differential thermal analysis (DTA) and thermogravimetry (TG). Pseudo-boehmite was formed rapidly at very early stages of aging, which was followed by the formation of alumina trihydrate sensitively detected by DTA for the dehydration. The development of DTA peaks for the dehydration of aged products corresponded to the degree of crystallinity and the amount of alumina hydrates detected by X-ray diffraction. The thermal dehydration of trihydrates as aging products at 70°C proceeded directly to alumina without the intermediate formation of crystalline boehmite or pseudo-boehmite. Thermal analysis techniques, especially DTA, were found to be powerful to studying the formation and crystallization of alumina hydrates from hydrous alumina gels and amorphous alumina in water.View full abstractDownload PDF (1290K) -
Yoshio Kondo1978 Volume 5 Issue 3 Pages 117-124
Published: July 15, 1978
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThe concept of quality control has been expanded in Japanese industries from the activities in the narrow field of manufacturing and inspection into the company-wide activities. Assurance of quality of the manufactured products is the most essential function, and, above all, the assurance of safety and reliability of the products is of basic importance. In order to assure the quality of manufactured products, the activities of designing quality and testing should be improved; testing the reliability of the manufactured products and the improvement of the quality of design are closely related. Along with the rise of productivity in the manufacturing processes by means of mechanization, computer control, etc., on the other hand, the prompt feed-back of data of the manufactured products to the manufacturing process is indispensable for the appropriate process control.
The measurements of bath temperature and carbon content of molten steel by means of “sub-lance”during the process of LD oxygen converter and the employment of high-frequency induction heating dilatometer to improve the welding characteristics of alloy steel were described as the examples of application of thermal analysis in the quality control activities.View full abstractDownload PDF (1211K) -
Atsushi Okazaki, Nobuhiko Ohama1978 Volume 5 Issue 3 Pages 125-127
Published: July 15, 1978
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (496K) -
Tokio Nei1978 Volume 5 Issue 3 Pages 127-131
Published: July 15, 1978
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (1159K)
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