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Volume 7 (1958 - 1959･･･
- Issue 3 Pages 70-
- Issue 2 Pages 42-
- Issue 1 Pages 2-
Volume 7, Issue 3
Displaying 1-8 of 8 articles from this issue
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Sanchi Midzushima1959 Volume 7 Issue 3 Pages 70-73
Published: October 10, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESS(1) Relation between Vapor Pressuse and Heat of Sublimation
(2) Mechanical Strength at elevated temperature
(3) Electrical Resistance at elevated temperature are describedView full abstractDownload PDF (592K) -
Wataru Funasaka, Makoto Kawane, Tatsuo Konada, Yoshio Asano1959 Volume 7 Issue 3 Pages 74-79
Published: October 10, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIsothemal adsorption and desorption of bromine by graphites and other carbonaceous compounds have been studied at 30°C or 80°C. The results were as follows:
i. Quantity of bromine adsorbed decreases with charcoal, graphite, soot and pitch coke in order. With graphites, adsorptive capacity of natural graphite exceeds that of artificial graphite.
ii. Effect of grain surface area upon quantity of adsorption is small with charcoal and graphite.
iii. Plotting the adsorption process curve on a full logarithmic section paper, it is found to be inflected with graphite and to be straight with the other kinds. The positions of inflexion and the inclinations of the inflected lines are characteristic with graphites.
iv. It is assumed that the point of inflexion and the inclination may be related to degree of graphitizing.View full abstractDownload PDF (934K) -
I. The Lattice Constant of Graphite CrystallitesTokiti Noda, Isamu Natsume1959 Volume 7 Issue 3 Pages 79-86
Published: October 10, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSBy carefully selecting the raw materials and diligently controlling their process of manufacture the characteristic properties of electro-graphitized carbon products are adjusted to fit their applications. The degree of graphitization is one of these characteristics. The density of powdered graphite measured by employing the pycnometric methed, or the lattice constant or size of graphite crystallite measured by the X-ray diffraction method has served as a measure of the degree of graphitization. In this paper the results of the measurements of the lattice constants of commercial electro-graphitized products are reported.
Powder photographic and X-ray diffractometric methods were employed in measuring the lattice constant and crystallite size. Sodium chloride was mixed with the graphite powder as an inner standard for both methods. In measuring the diffraction angle by an X-ray diffractometer, the shift in the diffraction angle due to the absorption of X-rays by the specimen can not be ignored because of the amall absorption coefficient of carbon. Curves of relationship between the diffraction angle and the shift of the diffraction angle due to the X-ray absorption and instrumental functions of the diffractometer were prepared for convenience in correcting the measured diffraction angle.
Electro-graphitized electrodes, anodes, brushes, graphite blocks for atomic reactors and other electro-graphitized products of domestic and foreign make were used as samples. Judging from the lattice constant, only small differences in the degree of graphitization were found among both the electrodes and anodes. Carbon brushes of soot origin could be easily differentiated from those of coke origin by their c0 values. 00l diffractions of certain brushes indicated the existence of graphite crystallites of both soot and coke origins. The co value of NCC-GBF grade graphite for atomic reactors was observed to have changed to a smaller value, i.e. to become more graphitized when it was heated up to approximately 2500°C. The co value of a graphite electrode grade for a mercury rectifier was found to be about the same as that of natural graphite.View full abstractDownload PDF (1365K) -
Tokiti Noda, Hiroshi Tomita, Kenichi Miyata, Shinya Sato1959 Volume 7 Issue 3 Pages 86-91
Published: October 10, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSurface replicas of several experimental carbon brushes and many commercial carbon brushes for the electrical use were observed by an electron microscope. Brushes of electro-graphitized coke type were composed of flaky clusters of graphite. Sizes of these clusters varied from brush to brush. In brushes of electro-graphitized soot type, graphitized carbon black particles were embedded in the graphite bed of binder coke origin. Sizes of these carbon black particles seemed to be almost the same as those of the original particles.View full abstractDownload PDF (10652K) -
Formation and Properties of Polymer CarbonSeiji Kubota1959 Volume 7 Issue 3 Pages 92-97
Published: October 10, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThis paper is concerned with the relation between the formation of polymer carbon and the properties of it for telephone transmitter use.
The results obtained are as follows:
1. The best heattreatment atmospher is “Vacuum.”
2. Polymer Carbon has less hygroscopicity and other suitable characteristics, then it is more reasonable for transmitter use than anthracite carbon.View full abstractDownload PDF (5181K) -
[in Japanese]1959 Volume 7 Issue 3 Pages 98-100
Published: October 10, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (486K) -
W.R. Appleman, Frank J. Oliver1959 Volume 7 Issue 3 Pages 101-107
Published: October 10, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1419K) -
W.R. Appleman, Frank J. Oliver1959 Volume 7 Issue 3 Pages 108-114
Published: October 10, 1959
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1338K)
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