巻号一覧
1998 巻 (1998)
- 185 号 p. 249-
- 184 号 p. 189-
- 183 号 p. 141-
- 182 号 p. 79-
- 181 号 p. 2-
1998 巻, 181 号
選択された号の論文の10件中1～10を表示しています
- |<
- <
- 1
- >
- >|
-
山田 秀雄, 辻 理1998 年 1998 巻 181 号 p. 2-7
発行日: 1998/02/25
公開日: 2010/06/28
ジャーナル フリーDiamond-like carbon (DLC) thin films were deposited under the deposition temperature control using theplasma pulsed CVD method (five seconds deposition and three minutes cooling repeatedly). We investigated theeffects of the deposition temperature on the reactive ion etching (RIE) with oxygen plasma for these DLC films interms of self-bias voltages, etching temperatures, surface profiles, contact angles and etching rates. Furthermore, somekinds of bonds between carbon and oxygen formed by O2 plasma etching treatments were identified on the surfaces of the DLC films and the dependence of the quantities of these bonds on the deposition temperature was also confirmed. The results obtained in this report are attributed to the densification of the DLSfilm structure.抄録全体を表示PDF形式でダウンロード (2318K) -
吉澤 徳子, 山田 能生, 白石 稔, 小島 重行, 玉井 久司, 安田 源1998 年 1998 巻 181 号 p. 8-13
発行日: 1998/02/25
公開日: 2011/07/05
ジャーナル フリーMesoporous carbons were prepared by steam activation of the mixture of a brown coal (Morwell) and metal (Fe, Ni or Co) acetylacetonate complexes (metal, 2.5 wt% of coal). According to the analysis with the N2 adsorptionisotherms measured at 77K, enhancement of mesoporosity in the activated carbons clearly depends upon the type ofmetals, i.e., Fe>Co>Ni. X-ray diffraction patterns showed the presence of metal oxide with less-crystalline carbon. Observation with transmission electron microscope (TEM) clearly illustrated wide dispersion of nano-scale (5-10nm∅) particles of the metal oxide and mesoporous pits as mesopores in the disordered carbon microtexture. Suchcharacteristic mesopores were not found in the samples prepared only from the coal, and therefore can be recognizedas characteristic mesopores induced by metal complex. The properties in size distribution and dispersion mode for metaloxide particles were investigated with TEM photographs, and found to be characteristic for each type of metals. Theseproperties were also discussed in connection with the morphological feature of mesoporous texture. The results canbe used to control not only the amount of mesopore but also the morphology of the mesoporous texture.抄録全体を表示PDF形式でダウンロード (1449K) -
小林 和夫, 井上 隆裕, 佐野 秀明, 内山 休男1998 年 1998 巻 181 号 p. 14-19
発行日: 1998/02/25
公開日: 2010/06/28
ジャーナル フリーPacking behavior and electrical resistivity of the powder under compression up to 46.2MPa were investigated on mesocarbon microbeads (MCMB) heat-treated at temperatures from 1000°C to 2600°C. Packing density, packing height and electrical resistivity of the powder compacts were measured in relation with applied pressure. Shape of the particles was observed by scanning electron microscope. Value of n of the formula ρ=aP-n+b (where ρ is electrical resistivity, P is an applied pressure, n, a and b are constant) was also estimated.
Deformation of the particles under the maximum applied pressure of 46.2MPa were observed for all MCMBs and particularly it was remarkable for graphitized MCMB particles heat-treated above 2400°C. The deformed particles reformed to the original spherical shape without fracture with release of pressure. However, packing behavior and electrical resistivity of MCMB under the cycles of applied pressure and unloading varied with heat-treatment temperature. Except for MCMB heat-treated at 1800°C, n values of the first unloading, which were thought to represent the characteristics of the packed bodies of each MCMB, were estimated about 0.4 for MCMBs heat-treated below 2200°C, and 0.8-0.9 for the ones heat-treated above 2400°C.抄録全体を表示PDF形式でダウンロード (1348K) -
佐々木 雅彦, 玉井 久司, 吉田 猛, 安田 源1998 年 1998 巻 181 号 p. 20-26
発行日: 1998/02/25
公開日: 2010/06/28
ジャーナル フリーThe adsorption isotherms of various acid, direct, and basic dyes on mesoporous activated carbon fibers (Y-ACF) obtained from pitch containing Y (acac) 3 were measured and the influence of their acid treatment was examined. TheY-ACF highly adsorbed dyes with large molecular size, whereas microporous activated carbon fiber scarcely adsorbedthese dyes. Electron probe X-ray microanalysis indicated that yttrium oxide in Y-ACF, which was produced from theyttrium complex, was thoroughly eluted by acid treatment of Y-ACF. The adsorption amounts of acid and direct dyeswith large molecular size on Y-ACF decreased by acid treatment. On the other hand, the adsorbed amount of basic dye increased by acid treatment. The adsorption characteristics was associated with the electrostatic properties of theactivated carbon fibers.抄録全体を表示PDF形式でダウンロード (1165K) -
The Fourth Carbon AllotropeRichard J. Lagow, Joel J. Kampa, Han-Chao Wei, Scott L. Battle, John W ...1998 年 1998 巻 181 号 p. 27-33
発行日: 1998/02/25
公開日: 2011/07/05
ジャーナル フリーA new carbon allotrope based “sp” hybridization contaning alternating triple and single bonds (an acetylenic or linear carbon allotrope) has been prepared. Studies of small (8 to 28 carbon atoms) acetylenic carbon model compounds show that such species are quitestable (130-140°C) provided that nonreactive terminal groups or end caps, such as t-butyl, triethylsilyl, phenyl, trifluoromethyl, or nitrile groups, are present to stabilize these molecules against further reactions. Using laser based synthetic techniques in the presenceof end capping groups, similar to the conditions normally used to generate fullerenes, thermally stable acetylenic carbon species cappedwith trifluoromethyl or nitrile groups have been prepared with chain lengths in excess of 300 carbon atoms. Under these conditions, the production of fullerenes is suppressed and only a negligible quantity of fullerenes is produced. Acetylenic carbon compoundsare not particularly moisture or oxygen sensitive but are moderately light sensitive. Carbon (13C) nuclear magnetic resonance (NMR), infrared (IR) spectroscopy, and laser desorption mass spectroscopy are used to characterize these carbon chain speciesand confirm that capped acetylenic chain polymers, (-C≡C-C≡-) n, join graphite, diamond and fullerenes-nanotubes as the fourthallotrope of the element carbon.抄録全体を表示PDF形式でダウンロード (1257K) -
菅原 活郎, 福田 宏1998 年 1998 巻 181 号 p. 34-40
発行日: 1998/02/25
公開日: 2010/06/28
ジャーナル フリーULSI is the key component for information and telecommunication systems. Carbon products and SiC productsused for ULSI are reviewed in the field of crystal growth, oxidation, doping and thin film formation. For the advancedULSI fabricaton, requirements for the carbon and SiC products are made clear. Requirements are ultra-high purity, matching for Si wafers of large diameter, reduced absorbed gas, reduced particles and reduced reaction with Si wafers. Engineers in this industry and in semiconductor industry should be in cooperation with each other and make newbreakthroughs to solve these problems.抄録全体を表示PDF形式でダウンロード (924K) -
松原 恵子1998 年 1998 巻 181 号 p. 41-43
発行日: 1998/02/25
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (557K) -
榎 敏明1998 年 1998 巻 181 号 p. 44-46
発行日: 1998/02/25
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (576K) -
近藤 照久1998 年 1998 巻 181 号 p. 47-48
発行日: 1998/02/25
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (1867K) -
ピッチ熱処理によって生成する異方性成分(メゾフェーズ)はなぜ発生するのでしょうか?持田 勲, 渡邉 史宜1998 年 1998 巻 181 号 p. 50
発行日: 1998/02/25
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (213K)
- |<
- <
- 1
- >
- >|