巻号一覧
1966 巻 (1966)
- 47 号 p. 2-
- 46 号 p. 2-
- 45 号 p. 2-
- 44 号 p. 4-
1966 巻, 45 号
選択された号の論文の5件中1～5を表示しています
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松山 英太郎1966 年 1966 巻 45 号 p. 2-6
発行日: 1966/05/31
公開日: 2010/06/28
ジャーナル フリーFine grinding is carried out by ultrasonic irradiation with Madagascar graphite powder.The power of the oscillator is 150VA and 20Kc/s. The powder is ground in the following liquids: glycerol, paraffin oil, pure water, water dissolved 1% sodium carbonate or tannic acid, water containing detergent, bromoform, mercury and sodium-potassium amalgam. It has been produced long suspending particles in the aqueous solution of tannic acid or detergent. Bromoform has been also effective but it is difficult to handle. Several types of cells for irradiation is tried and one of the cells has worked satisfactorily for long time in which slurry of graphite circulates along the end face of the horn of oscillator.
The powder crushed by this method is examined under optical and electron microscopes and by X-ray diffractions. The chief features of the grains are: 1, The thickness of the flake-like grains is very thin and comparatively uniform; 2, X-ray diffraction lines belonging to the rhombohedral modification of the crystal are very intense and relatively sharp.The content of the modification is larger than in the samples treated by any other method tried before. It is considered that there is an ultimate content attainable by grinding.抄録全体を表示PDF形式でダウンロード (1795K) -
浅井 米四郎, 長野 美雄1966 年 1966 巻 45 号 p. 6-13
発行日: 1966/05/31
公開日: 2010/06/28
ジャーナル フリーCarbon brush materials were manufactured following out a design of experiments, varying the mixing ratio of different carbon blacks, the size of particles to be molded, molding pressure and the graphitizing furnace. Measurements were made on lattice constant and crystallite sizes by means of X-ray diffraction and on physical properties of these materials, and then the rate of wear and the sound pressure level of sliding noise of brushes made of these materials were measured.
The factorial effect on these brush characteristics and correlation between these characteristics were investigated. From X-ray diffraction results, the crystallite size, Lc, was shown to be highly important for brush materials. As for the rate of brush wear, correlation with Young's modulus and Rockwell hardness (more than Scleroscope hardness) were significant, whereas for brush noise, the degree of graphitization of the brush material was considered significant except for the difference of raw materials.抄録全体を表示PDF形式でダウンロード (2176K) -
菱山 幸宥, 吉田 博幸1966 年 1966 巻 45 号 p. 13-18
発行日: 1966/05/31
公開日: 2010/06/28
ジャーナル フリーThe thin plates of polyvinyl chloride char in which the nongraphitic pitch binder of usual carbon prodact was absent were prepared by the carbonization in the narrow spacing between two quartz plates. They were heat-treated at various temperatures. The Hall coefficient and the lattice constant of them were measured at the room temperature. The heat-treatment temperature dependence of the Hall coefficient was the same as those of typical soft carbons.
In order to explain the variation of the Hall coefficient, it is assumed that the two dimensional Brillouin zone and the two dimensional Fermi surface (Fermi curve) exist in the substances which were heat-treated in the temperature range from 900°C to 1900°C. The existence of electron-like carriers and hole-like carriers was assumed. The sign of the Hall coefficient was interpreted in terms of the length of the Fermi curve. The three dimensional Brillouin zone and the three dimensional Fermi surface were assumed for the specimens which were heat-treated above 2000°C. The rapid decrease and the change of sign of the Hall coefficient at the heat-treatment temperature of nearly 2100°C were associated with the overlapping of electrons across the zone boundaries.抄録全体を表示PDF形式でダウンロード (939K) -
ガラス状硬質炭素の試作に関する経験本多 敏雄1966 年 1966 巻 45 号 p. 19-25
発行日: 1966/05/31
公開日: 2010/06/28
ジャーナル フリーSeveral kind of glassy carbons can be obtained by carbonization procedure by using furan resin or thermo hardening resin as source materials under the suitable choices of following conditions as 1) catalyzer and its guantity 2) length of the time for solidification process at room temperature 3) temperature and length of the time for baking process in air 4) temperature increase rate and atmosphere for carbonization procedure.
The glassy carbons can be prepared from six different kind of resins in laboratory scale. Further more, carbonization of these resins including U, Fe, B etc. is studied.
Boron doped glassy carboas is obtained three kind of these six resins as starting materials.
In this report, experimental facts are described in preparing glassy carbons.抄録全体を表示PDF形式でダウンロード (6679K) -
大北 熊一1966 年 1966 巻 45 号 p. 26-36
発行日: 1966/05/31
公開日: 2011/07/05
ジャーナル フリーThe mechanism how carbon black reacts with free radicals is not disclosed yet.
The aim of the present paper described here was to take a step into the reactions of carbon black surface with free radicals. On the other hand, graft-polymerization of vinyl monomers such as styrene or methyl methacrylate onto the surface of carbon black concerned with the nature of the free radical reactions was discussed.抄録全体を表示PDF形式でダウンロード (4356K)
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