Materials Literature
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細い管型反応器によるホットソープ法（高温の界面活性剤中での反応晶析）で，マンガンドープ半導体ナノ粒子の連続調製を試みた．反応管内流れは層流であるため，拡散支配の緩慢な混合過程，広い滞留時間分布などが問題となる．そこで，反応管内部の液相の混合状態を改善するために，反応管に気液スラグ流を導入し，その効果を検討した．その結果，ドーパントに由来する蛍光スペクトルが発現するまでの管内における滞留時間が，液一相で反応させた場合に比べて，大幅に短縮できることが明らかになった．
We have studied the electrical properties and depth concentration profiles of Au/Ni-Zn-O/p-GaN and Au/Ni-Zn/p-GaN, thus of structures containing zinc as a p-type dopant utilized to increase the concentration of free charge carriers in the subsurface region of GaN and to gain a low-resistance ohmic contact. The layers…
We investigate the effect of drawing conditions on the drawn diameter in cold wire drawing by Finite Element Method. The mechanism of diameter variation was elucidated including the elastic deformation of the die, undershoot, diameter thickening during drawing and unloading springback. Undershoot was caused by the sep…
Zn-Ni and Zn-Co alloy coatings with 5-18 at% Ni and 8-25 at% Co have been prepared by DC plating in additive free chloride baths.Effects of bath composition on the alloy composition, texture, grain size, morphology and hardness were investigated. Potentiodynamic anodic stripping, reverse chronopotentiometry were emplo…
Materials property data, and broader materials information, are essential to the wide range of people and functions in engineering enterprises involved in the design and construction of power generation facilities. This paper focuses on how this complex and specialist information must be managed, and how it can be dep…
This work examines the average value of electronic kinetic energy during the dielectric ageing of solid insulators. For this purpose, samples of various insulators with a relative permittivity e r =2.5-4.5 (e.g. industrial bakelite) were electrically stressed by the imposition of a high AC voltage. The electrode set-u…
Structure Determination from Powder Diffraction data (SDPD) technique for organic and organo-metallic molecular crystals has been developed since 1990s, and is now widely used. The X-ray powder diffraction data has a difficulty in extraction of correct intensity data from overlapping diffraction peaks, however, the de…
Several R & D topics related to surface science in automobile industry are reviewed in chronological order from early 1970s, including topics on instrumental analysis of surfaces, sputtering and plasma processing, birefringent thin films, all optical sensors, transient analyses of surface chemical reactions in automob…
Conjugated Schiff-base macrocycles are interesting compounds of interest as platforms for catalysis, the preparation of novel synthetic ion channels and potentially as porous or tubular discotic liquid crystals. The preparation of organic macrocycles is typically low yielding, with polymerization competing with cycliz…
近年の資源保護，環境保護への取り組みにより製紙原料として植林木パルプ，古紙原料の利用が多くなっている。植林木パルプは短繊維であり多くの主材料はLBKPである。叩解工程において無駄な繊維カットを行なわずに紙力を得ることが重要な課題であるといえる。そして更なる課題としては省エネルギーである。本稿では当社での最新のLBKP叩解テストデータを元にADCダブルコニファイナーとDDR，そしてFINEBARと鋳鋼刃の特徴を説明する。また，古紙利用の増加に伴い原質設備のスクリーン工程でも省エネルギーは重要である。省エネルギー用スクリーンローターとして開発されたGHCローターと更に開口面積を増加させたNW1バスケットの説明をする。
Epithelial downgrowth on implants can result in deep pockets or sinus tracts which in turn can lead to marsupialization and eventual failure of the implant. One solution to this problem would be to have a surface of an implant that has the ability to impede the apical migration of epithelium. The present studies were…
The ZnO nanowires were grown on Si(100) substrates by chemical vapor deposition method without using catalyst.The X-ray diffraction(XRD) indicates the highly preferred crystal orientation along the c axis of ZnO in this sample.Field emission scanning electron microscope(FE-SEM) showed well-aligned ZnO nanowires with u…
類に分類されよう．①実験室的腐食試験，②パイロット プラント腐食試験，③実地試験(プラント試験)である． 腐食は材料と環境の相互作用により，かなりの長時間
Based on recently reported experimental data, the thermodynamic details of the Ti–Al–Nb system, relevant for the design of engineering c-TiAl based alloys, have been reinvestigated. Thermodynamic functions for the phases of interest (a/a2, b/b0 and c) are optimized by applying the Parrot module of the software package…
The modern technologies often require modification of solid material surfaces with keeping desired bulk properties. To control the surface properties of solids the atmospheric- pressure plasma can be very useful. In this work the thin hy- drophobic protective films were deposited on the paper sur- face using atmospher…
We will describe the advances being made in the different modalities of InSb-based infrared sensors for active imaging, such as avalanche detection, polarimetric and multispectral capabilities using manufacturable technologies.
In this paper, we report a promising approach for fabricating large-scale flexible and stretchable electronics using a semiconductor-enriched carbon nanotube solution. Uniform semi- conducting nanotube networks with superb electrical properties (mobility of ∼20 cm 2 V � 1 s � 1 and ION/IOFF of ∼10 4 ) are obtained on…
メソ孔やミクロ孔を有する多孔質材料は吸湿性能を示すことが知られている．その評価手法として，絶乾試料を用いた水蒸気吸着等温線測定や窒素吸着法による細孔分布解析が一般に行われている．しかし，実際に吸着剤が利用される環境では，吸着剤は絶乾状態ではなく，環境条件に応じた水蒸気吸着が起こっている．そこで相対湿度の変化に対する水蒸気吸着により，窒素吸着法で求まる細孔分布がどのように変化するかを評価するため，種々相対湿度環境下で吸湿平衡状態に達した試料を液体窒素で瞬間凍結させた後，乾燥操作を行わずに，窒素吸着測定を試みた．その結果，いずれの場合も，小さな径の細孔から順に水分子の吸着が始まり，相対湿度の増大とともに大きい細孔径の細孔にも水分子の吸…
Surface structure of 55% Al-Zn alloy coating and corrosion product distribution after exposure in chloride-containing electrolytes
In order to decrease the bandwidth of the normal multilayers and improve the spectral resolution,several kinds of multilayers composed of low-Z materials were investigated in extreme ultraviolet and soft X-ray regions.Firstly,three kinds of multilayers of low-Z materials,Si/B4C,Si/C and Si/SiC multilayers were chosen…