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Volume 8 (1960)
- Issue 1 Pages 2-
Volume 8, Issue 1
Displaying 1-5 of 5 articles from this issue
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II, The Size of Graphite CrystallitesTokiti Noda, Isamu Natsume1960 Volume 8 Issue 1 Pages 2-6
Published: June 03, 1960
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe size of graphite crystallites in various electro-graphitized carbon products was measured by using a recording χ-ray diffractometer. A measured profile of χ-ray diffraction of a carbon product is a compound profile of graphite crystallites of different carbon bases, if the product was made from a mixture of different carbon materials. The calculated values using the half-intensity width of the compound profile may not give the true mean size of crystallites. However, the size of graphite crystallites was measured with the conventional method in order to obtain an approximation of crystal size in commercial electro-graphitized carbon products.
The size of graphite crystallites of electro-graphitized carbon products largely depends on the original carbon materials used and is not necessarily the same in the products having the same degree of graphitization. Although thickness Lc and width La of graphite layer of electro-graphitized coke base products, such as electrodes and anodes, were not parallel with the degree of graphitization, the thickness of three dimensional crystal layer Lhkl of these products grew large with the degree of graphitization.
Even though carbon brushes are usually made of a mixture of different carbon materials and the measured values of crystal size do not give the true dimensions, a useful information could be deduced from the measured values in comparing with the degree of graphitization of the same products. Thus one can estimate the relative size of carbon black particles used in the brushes of carbon black base.View full abstractDownload PDF (766K) -
Onthe Surface Dirt of Carbon PowderSeiji Kubota1960 Volume 8 Issue 1 Pages 7-10
Published: June 03, 1960
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThis paper is concerned with the relation between the surface dirt of carbon powder and the properties of its for telephone transmitter.
The figure of deposited carbon and degree of surface dirt are tested with microscopic and suspended powder on ethylalcohol, and the coefficient of friction are measured with packing percentage of transmitter at constant vibration and time,
The results oftained are as follows.
1) The efficiency of carbon powder and its coefficient of friction are dependent on the degree of surface dirt and no dirt carfon is most desirable.
2) The degree of surface dirt are dependent on the volume of pyrolysis gas, carrier gas and its contents, the materials of vessel and its structure.
The carbon surfae is lesser dirt, if the heat treatment temperature of carrier gas, town gas, is higher.
3) The figure of deposited carbon become clear by the microscopic photograph.View full abstractDownload PDF (3774K) -
Homogeneity and Electrolytic Consumption of Graphite AnodesTokiti Noda, Keiichi Sato, Takeo Shibuya1960 Volume 8 Issue 1 Pages 10-18
Published: June 03, 1960
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSWith the intention of contributing to the improvement of the testing method of consumption of graphite anode, measurements were made of electric resistance and electrolytic wear of graphite pieces cut from sample anodes. Nine samples of commercial anodes were cut into pieces 5mm×10mm×100mm, the lengthwise edge being parallel to the direction of extrusion of anode and pieces 5mm×10mm×lmm, the l edge being the extent of thickness of anode and perpendicular to the direction of extrusion. Electric resistance of all parts of these pieces was measured by D. C voltage drop method, and charts of resistance distribution on the sectional area perpendicular to the direction of extrusion of anode were made.
The above pieces which were cut perpendicular to the direction of extrusion, the length spanning the thickness of sample anodes, were used as anodes in the electrolysis of 4 N NaOH. These anodes stood endwise against steel cathods. The wear in the direction of the thickness of sample anodes was estimated from the lengthwise wear of the specimens. No direct relationship was found between the wear and the homogeneity represented by the, resistance distribution of tested anodes.View full abstractDownload PDF (1253K) -
T. Noda, T. Torii, H. Hashizume, Y. Sato, A. Shibata1960 Volume 8 Issue 1 Pages 18-23
Published: June 03, 1960
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (9599K) -
[in Japanese]1960 Volume 8 Issue 1 Pages 24-28
Published: June 03, 1960
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (834K)
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