巻号一覧
1996 巻 (1996)
- 175 号 p. 243-
- 174 号 p. 195-
- 173 号 p. 137-
- 172 号 p. 71-
- 171 号 p. 2-
1996 巻, 171 号
選択された号の論文の9件中1～9を表示しています
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J.-F. Després, A. Oberlin1996 年 1996 巻 171 号 p. 2-12
発行日: 1996/02/26
公開日: 2011/07/05
ジャーナル フリーPDF形式でダウンロード (12575K) -
菊地 理恵, 湯田 坂雅子, 松井 丈雄, 大木 芳正, 太田 悦郎, 吉村 進1996 年 1996 巻 171 号 p. 13-17
発行日: 1996/02/26
公開日: 2010/06/28
ジャーナル フリーThin films of graphite were formed by chemical vapor deposition using two kinds of precursors, 2, 6-di (2', 6'-dimethy1-1'-naphthoyl)-naphthalene (0), and 2-methyl-1, 2'-naphtylketone (II). Structures of the films were studied by X-ray diffraction and Raman scattering spectra. The graphite formation temperatures on Ni using (0) and (II) were found to be above 800°C and 600°C, respectively. When the dehydrogenation from the starting materialis enhanced by Ni below 700°C, the graphite film could be obtained on the Ni substrate.抄録全体を表示PDF形式でダウンロード (698K) -
900℃における炭化時間の影響安部 郁夫, 人見 充則, 幾田 信生, 川舟 功朗, 計良 善也1996 年 1996 巻 171 号 p. 18-23
発行日: 1996/02/26
公開日: 2011/07/05
ジャーナル フリーIn order to obtain basic data for manufacture of porous carbon materials from various woody wastes, porous carbons were prepared from wood of the Japanese cypress by carbonizing at 900°C and the effect of holding time at 900°C on the properties of the carbons obtained were examined.
A slight amount of air entered the vessel for carbonization during the heat treatment at 900°C and an activation reaction occurred and weight loss of the carbon was observed. The weight loss corresponded with a formation of micropores in the carbon. The pore-size distribution curve in macropore and mesopore ranges of the carbons was similar to that of a commercial activated carbon. An increase of holding time at 900°C caused a development of mesopores. In macropore range, an increase of holding time at 900°C caused a lowering of the height of peak at 500nm radius and an increase of the height of peak at 1500nm radius. The change of macropore distribution was not appreciably followed by weight change. Porous carbon with similar adsorptive capacity as commercial activated carbon could be prepared by prolonged heating at 900°C.抄録全体を表示PDF形式でダウンロード (789K) -
高温における熱処理時間延長の効果鏑木 裕, 吉田 明, 北畑 秀男, 菱山 幸宥1996 年 1996 巻 171 号 p. 24-29
発行日: 1996/02/26
公開日: 2010/06/28
ジャーナル フリーGraphite films with very high crystal perfection were prepared from carbonized aromatic polyimide films by successive heat treatments at 3100°C for 40 min and then 3200°C for 23 min without mechanical stress. The starting materials were a commercially available Kapton with 25 μm in thickness and laboratory prepared high-modulus polyimide films via polyamic acid gel with 18 and 45 μm in thickness. Crystallinity and microtexture of the graphite films were examined by the measurements of X-ray diffraction, maximum transverse magnetoresis-tance (Δρ/ρ) max and Hall coefficient RH at 4.2 K, and by the observation of electron channel-ing contrast image (ECI) by scanning electron microscope. The ratios of peak intensities of 101 diffraction peak to 100 diffraction peak, I101/I100, were 0.000-0.037, mean free path of carriers, λ, estimated from (Δρ/ρ) max at 4.2K, 0.1T were 5.7-6.5μm, and mean crystal grain diameters D evaluated from ECI were 11-12 μm for the graphite films. Quite large (Δρ/ρ) max was observed at 4.2 K for the graphite films. The Shubnikov-de Haas oscillations were also observed clearly at 4.2 K in (Δρ/ρ) max and especially in RH, and the Landau levels of n=2-6 were found. The graphite films obtained can be comparable with an HOPG sample heat treated at 3600°C under high mechanical pressure (HOPG3600) in crystallinity and degree of c-axis orientation of graphite layers. These results indicate that the crystallinity and c-axis preferred orientation of graphite films can be improved remarkably by extention of the heat treat-ment time at high temperatures without mechanical stress. There are differences between the electronic properties of HOPG3600 and these of the graphite films because of their different microtextures i.e. different defect distributions.抄録全体を表示PDF形式でダウンロード (2219K) -
遠藤 守信, 竹内 健司, 西村 嘉介, 笠井 利幸1996 年 1996 巻 171 号 p. 30-35
発行日: 1996/02/26
公開日: 2010/06/28
ジャーナル フリーThe burning-off characteristics by joule heating of mesophase pitch-based carbon fibers (MPCFs) in air have been studied, in order to evaluate the current capacity for electrical applications of the fibers. It is indicated that MPCFs have very high current capacity, as around 2.5×105 J/mm2, up to burning-off by joule heating, increasing with modulus of the fibers. The cross-section morphologies of the fibers are emphasized after burning-off, which characterize the structure of the original fibers. Similar experiments has been done for the pitch-based activated carbon fibers, and shown the characteristic feature of burning-off caused by the porous structure.抄録全体を表示PDF形式でダウンロード (4007K) -
中土井 喜春, 金子 友彦, 大谷 杉郎1996 年 1996 巻 171 号 p. 36-38
発行日: 1996/02/26
公開日: 2010/06/28
ジャーナル フリーCarbon thin films were prepared from Decacyclene on quartz substrates with Chemical Vapor Deposition (CVD) process at 900°C under various conditions. The thickness and the electrical conductivity of these carbon thin films were measured by analytical instrument. As a result, it was found that the thickness of the obtained carbon thin films was controlled in the range of 0.1-1.5 μm by changing raw material temperature, reaction time, and the flow rate of carrier gas, and the electrical conductivity tended to increase with decreasing the thickness.抄録全体を表示PDF形式でダウンロード (328K) -
安藤 淳平1996 年 1996 巻 171 号 p. 39-44
発行日: 1996/02/26
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (923K) -
中村 正1996 年 1996 巻 171 号 p. 45
発行日: 1996/02/26
公開日: 2010/06/28
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松島 功明1996 年 1996 巻 171 号 p. 48
発行日: 1996/02/26
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (105K)
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