All issues
Volume 1962 (1962)
- Issue 33 Pages 2-
- Issue 32 Pages 2-
- Issue 31 Pages 3-
Volume 1962, Issue 32
Displaying 1-7 of 7 articles from this issue
- |<
- <
- 1
- >
- >|
-
Size and Shape of the Particles of Petroleum CokesYoshitami Fukuda, Kunitaro Kawazoe, Kenji Ikeda1962 Volume 1962 Issue 32 Pages 2-9
Published: September 30, 1962
Released on J-STAGE: March 01, 2011
JOURNAL FREE ACCESSThis paper is the fundamental report for the shape factor of particles of carbons .
The shape factor was estimated by the specific surface, obtained through the air permeability method, of each of the groups of the particles of 48-65, 65-100, 100-150 and 150-200 mesh of G. L. petroleum cokes crushed by an impact crusher.
The results are that Carman shape factor of the crushed particles of the petroleum cokes is approximately 0.31 and that they may be represented to have the approximate shape of ellipsoid of rotation of the ratio of minor axis to major axis between 0.30-0 .40.
It has been found that the value of specific surface of petroleum cokes can be calculated for practical purpose by the following empirical approximate equation.
Sw≅6.1/√d1·d2View full abstractDownload PDF (3395K) -
Tokiti Noda, Michio Inagaki, Chihiro Sugie1962 Volume 1962 Issue 32 Pages 10-12
Published: September 30, 1962
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSLattice constants, sizes of graphite crystallite, and degree of crystallite orientation of many commercial graphite electrodes were measured by the X-ray diffraction method. The distribution of inorganic impurities in these electrodes, which was investigated by means of radiography, had been dealt with in our previous papers (Tanso (Carbon), No.30, 26 (1961) and No.31, 9 (1962)).
Using extra pure silicon powder as an inner standard, the lattice constants-c0 (002), c0 (004) , a0 (110) , d (112) -and the sizes of graphite crystalite-Lc (002) , Lc (004) , La (110) , L (112) -were obtained from (002), (004), (110) (112) diffractions, respectively. The values of c0 of all the electrodes except one were 9.720-6.728Å and any remarkable differences were not found among them. The values of a0 (110), c (112), Lc, and La (110) of all the electrodes were 2.460Å, 1.156Å, ca. 500Å, and ca. 1000 Å, respectively. The value of L (112) of Acheson 18″ electrode was larger than those of the other electrodes.
The orientation ratio was calculated, which had been proposed as a measure of crystallite orientation in our previous paper (Kogyo Kagaku Zasshi, 62, 1300 (1959)). The orientation ratios of all the elecrodes were 1.1-1.2.View full abstractDownload PDF (447K) -
Effect of tool material on machinabilityToru Yanase1962 Volume 1962 Issue 32 Pages 13-21
Published: September 30, 1962
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe Final objcet of this study is to establish the machinability of Graphite. in this Report, the tool life test of various grade carbide, ceramic, high steel tools are carried out to investigate machining perftormance, the compatibilities to be appreciable for some work materials, such as Graphite, Carbon electrode cast Iron ete.View full abstractDownload PDF (8718K) -
Seiji Kubota1962 Volume 1962 Issue 32 Pages 22-27
Published: September 30, 1962
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFor the purpose to establish the requirements for coal used as raw material of granular carbon for telephone transmitter, studies are carried out on the physical and chemical properties of the coal and on the electrical properties of the granular carbon prepared from the coal. Anthrecite coal from Honge is crushed into small blocks. They are classified into five groups according to their appearances. Each of these groups is found to be distinctly different with each other in microscopic surface texture, chemical composition, form, purity, density and homogeneity. The difference observed in electrical properties of the granular carbons prepared from the fine powders of these classified groups of coal by roasting at 950°C in an atmosphere of town gas can be explained qualitatively from the difference in the physical and chemical properties of the raw materials. From the results it is concluded that the anthracite suitable for manufacturing granular carbon for use of telephone transmitter should (1) be lustrous and smooth in fractured surface (2) not be flaky and have no sharp edge, (3) be dense and homogeneous, (4) be abundant in fixed carbon and (5) be scarce in ashes especially in iron compounds.View full abstractDownload PDF (6738K) -
Yasuichi Sasaki, Fujio Ichikawa, Hisashi Imai, Shinobu Uruno1962 Volume 1962 Issue 32 Pages 27-30
Published: September 30, 1962
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSynopsis-The purity of the nuclear graphite are important in connection with the design of nuclear reactor. Here, the radiochemical analysis of these samples was carried out to identify the nuclides having induced activity from impurities of the graphite samples. The graphite were irradiated in the Hanford Material Testing Reactor to 5.8×1020 nvt for 1 year and 60Co, 46Sc, 35S were detected as the greater part of induced activity.
On the other hand, the same kinds of graphite (non-irradiated) were irradiated in JRR-1 Reactor for short time interval, on which radiochemical analysis was also conducted, and 65Ni, 64Cu, 56Mu, 56Mn, 52V, and24Na were detetected.View full abstractDownload PDF (615K) -
Tokiti Noda, Hiroshige Suzuki1962 Volume 1962 Issue 32 Pages 31-41
Published: September 30, 1962
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1647K) -
[in Japanese]1962 Volume 1962 Issue 32 Pages 42-56
Published: September 30, 1962
Released on J-STAGE: March 01, 2011
JOURNAL FREE ACCESSDownload PDF (2255K)
- |<
- <
- 1
- >
- >|