巻号一覧
前身誌
28 巻, 11 号
選択された号の論文の6件中1～6を表示しています
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炭化珪素の表面処理鈴木 昇, 郷 豊, 馬場 憲之, 伊藤 二郎, 遠藤 敦, 宇津木 弘1991 年 28 巻 11 号 p. 670-678
発行日: 1991/11/10
公開日: 2010/04/30
ジャーナル フリーThe surface properties of silicon carbides pulverized in n-hexane and n-hexane solutions of cetanol or octadecyltriethoxysilane were investigated through their dispersive properties, by scanning electron micrographs (SEM), infrared absorption spectra, pyrolysis and the number of surface groups estimated from carbon contents and surface areas. The following were confirmed: (1) The surface nature of silicon carbide pulverized in n-hexane was hydrophilic and was similar to that of unpulverized silicon carbide. The surface nature of silicon carbide pulverized in an n-hexane solution of cetanol appeared to be hydrophilic, but it was hydrophobic in comparison with that of unpulverized silicon carbide. The surface nature of silicon carbide pulverized in an n-hexane solution of octadecyltriethoxysilane appeared to be hydrophobic (2) The pulverization was confirmed by SEM to proceed with increase in grinding time. (3) The characteristic absorption due to surface groups was observed in that of silicon carbide pulverized in n-hexane solutions of cetanol or octadecyltriethoxysilane. The vapors evolved by the pyrolysis of the surface group were observed. (4) The surface-treatment of silicon carbide was confirmed to be performed by pulverization in n-hexane solutions of cetanol or octadecyl-triethoxysilane. (5) The reaction mechanisms were confirmed to be,抄録全体を表示PDF形式でダウンロード (2105K) -
慣性分級上野 博之1991 年 28 巻 11 号 p. 679-683
発行日: 1991/11/10
公開日: 2010/04/30
ジャーナル フリーThe objective of inertial classification facilities is to classify the particles which follow the flow well and particles which do not. The flow in which the vertical flowing direction is slightly bent to the right side, and thereafter, largely bent to the left side is taken up. Moreover, the flow which utilizes von Karman's vortex street and that which changes the extent of meandering slightly in the course of time is also taken up.
At the first change in the flowing direction, the particle trajectories which follow the flow well and those which do not can be identified. However, when the effect of the next change in the flowing direction is exerted on them, the tracks of both particles may not be able to be identified clearly.抄録全体を表示PDF形式でダウンロード (502K) -
李 冷, 王 炳華, 荒川 正文1991 年 28 巻 11 号 p. 684-688
発行日: 1991/11/10
公開日: 2010/04/30
ジャーナル フリーThe objective of the present investigation was to understand the relationship between the pore structure of gypsum mold and suctionability as a function of the water/plaster ratio in the hydrate reaction of plaster. Nine kinds of gypsum mold, which have different water ratios of hydration, were used.
The relationship between the pore characteristics and suctionability of molds were analysed considering the structural difference of the micropores in gypsum molds.
It was found that the pore volume and mean pore size increase as the water volume in hydration increased, however, pore size distribution gave a different pattern. That is, volume fraction of the micropore under 1μm in total pore volume decreased as the water/plaster ratio increased, and the bimodal distribution changed into a unimodal shape.
Therefore, the suction pressure gave the maximum value for the gypsum sample which was obtained what water was added to 80, 90g with 100g plaster at the reaction of hydration.抄録全体を表示PDF形式でダウンロード (548K) -
安部 英一, 山田 則行, 広末 英晴1991 年 28 巻 11 号 p. 689-693
発行日: 1991/11/10
公開日: 2010/04/30
ジャーナル フリーProducing sustained release micropheres was tried by coating a drug with inorganic fine particles. Magnesium carbonate in a tumbling fluidized bed was coated with two sorts of colloidal silica having a size of about 60-90nm and a size less than 6nm. It was confirmed experimentally by varying the size of colloidal silica, by varying the mixing ratio of two different-sized colloidal silica and by using a coating mass, that microspheres having different release rates.抄録全体を表示PDF形式でダウンロード (527K) -
細孔からの完壁な流れ志波 靖麿1991 年 28 巻 11 号 p. 694-701
発行日: 1991/11/10
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (5879K) -
土井 眞1991 年 28 巻 11 号 p. 715-717
発行日: 1991/11/10
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (366K)
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