Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Ellipsometric measurements (in conjunction with observations of reflectance and cell current and voltage) have been performed in for Si wafers, of various crystallographic orientations and dopant types, during growth of surface films under anodic and cathodic bias and during open‐circuit etch back. The optical effects…
Anodic passivation of Type 316L stainless steel in a borate‐boric acid buffer solution was studied using cyclic voltammetry and Auger spectroscopy. Based on a comparison with the results obtained on the metals (iron, chromium, and nickel), the reduction peaks appearing in the voltammograms for the steel were attribute…
The selective removal and fixation of Cs and Sr have been studied in zeolite A and chabazite. Cesium ion was preferentially distributed into chabazite with a high distribution coefficient (K Cs>103 cm3·g−1) in the presence of NaCl (10−1 mol·dm−3). The K Sr values for zeolite A attained about 103 cm3·g−1 in the pH rang…
“Polyaniline” has been synthesized in various forms both chemically and electrochemically in aqueous media. The quinoid-benzenoid-diimine form, an insulator, is doped by dilute aqueous protonic acids to the metallic regime ([sgrave] ∼ 5 ohm−1cm−1; compressed pellet) to give the corresponding iminium salt. The polymer…
We determine the aspect-ratio dependence of the critical percolation threshold for various systems of rods. An exact expansion, due to Coniglio et al., tests the conjecture that the threshold is proportional to the inverse of the expected excluded volume. We confirm the conjecture, and show that the proportionality be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbonyl methylenation using a titanium-aluminum (Tebbe) complexStanley H. Pine, Robert J. Pettit, Gregory D. Geib, Susana G. Cruz, Claudio H. Gallego, Tomas Tijerina, and Randall D. PineCite this: J. Org. Chem. 1985, 50, 8, 1212–1216Publication Date (Print):April 1, 1985Pub…
A segment of silk polyfilament suture [No. 2-0(USP)], ca. 10 cm long, was coated with a thin membrane (2-6 micron) of chitosan, N-acetylchitosan, or N-hexanoylchitosan. The suture was directly inserted into the lumen of dog's peripheral veins. The in vivo blood compatibility of these membranes was macroscopically dete…
The anodic oxide film on titanium has been studied by ellipsometry and SEM observation. Ex situ multiple‐angle‐of‐incidence and in situ ellipsometric measurements allow the complex refractive index to be estimated at for the titanium substrate and at for the anodic oxide film at wavelength 546.1 nm. The anodic oxide f…
Abstract Most countries intend to dispose of their high-level radioactive wastes by converting them into a solidified wasteform which is to be buried within the earth. SYNROC is a titanate ceramic wasteform which has been designed for this purpose on the basis of geochemical principles. It comprises essentially rutile…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric relaxation of the crystal-amorphous interphase in poly(vinylidene fluoride) and its blends with poly(methyl methacrylate)Bernd Hahn, Joachim Wendorff, and Do Y. YoonCite this: Macromolecules 1985, 18, 4, 718–721Publication Date (Print):April 1, 1985Publication His…
The microstructure of strontium titanate internal boundary layer capacitors at various stages in their processing was studied by transmission electron microscopy of rapidly quenched and normally cooled samples. Compositions containing excess TiO 2 , Al 2 O 3 , and SiO 2 have a completely wetting liquid phase at the si…
Abstract The gas permeabilities of three polyacetylene films, prepared from poly[1‐(trimethylsilyl)‐1‐propyne], poly( tert ‐butylacetylene), and poly(1‐chloro‐2‐phenylacetylene), were studied. Although depending on conditions of polymerization and membrane preparation, typical permeability coefficients P of the polyme…
Films of polyacetylene, , partially oxidized ("p‐doped") to 2% and 7% having compositions and , respectively, were employed as the cathode in electrochemical cells of the type . They were charged and discharged (both immediately and after a 16h delay) at constant currents ranging from 0.01 to 20.00 mA/cm 2 of film, an…
Etude de l'effet des cations modificateurs alcalins et alcalinoterreux sur le degre de polymerisation de verres de silicate, par spectrometrie RMN sous angle magique. La largeur de bande RMN augmente en fonction du pouvoir polarisant du cation. Un effet semblable a lieu dans les verres d'aluminosilicate a reseau tridi…
We derive a system of effective equations for wave propagation in a bubbly liquid. Starting from a microscopic description, we obtain the effective equations by using Foldy's approximation in a nonlinear setting. We discuss in detail the range of validity of the effective equations as well as some of their properties.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInternal model control. 2. Design procedure for multivariable systemsCarlos E. Garcia and Manfred MorariCite this: Ind. Eng. Chem. Process Des. Dev. 1985, 24, 2, 472–484Publication Date (Print):April 1, 1985Publication History Published online1 May 2002Published inissue 1 Ap…
Poly(epsilon-caprolactone) [PEC], a biodegradable aliphatic polyester, undergoes a two-stage degradation process: The first lengthy phase involves nonenzymatic hydrolytic cleavage of ester groups, the second phase beginning when the polymer is more highly crystalline, and of low molecular weight. The cellular events o…
Abstract The apparent viscosity of foam flowing through smooth capillaries was measured experimentally, and a mathematical model was developed. Foam texture (a measure of bubble volume) is a key parameter in determining the following properties of foam flowing through a capillary: (1) whether the foam exists as bulk f…
Anodic growth of polyaniline films on a Au microelectrode array has been carried out to add to the characterization of polyaniline and to fabricate polyaniline-based microelectronic devices, diodes and transistors, that function when the polyaniline-functionalized microelectrode array is immersed in an electrolyte sol…
乗用車用懸架ばねの高応力化指向, 弁ばねのパワーアップ指向は, 両者の要求レベルに差はあるとはいえ, いずれも耐久性の向上が共通した目標である. これを達成するには, 素材であるばね鋼の超清浄鋼化が1つの有力な手段であると考えられる.そこで, 低コスト・大量生産を前提とした脱ガス法を一般ばね鋼に適用して超清浄鋼を製造し, 懸架ばね用あるいは弁ばね用素材としての特性を検討した. その結果,(1) 200kgf/mm2級高強度懸架ばね用材料として, 酸素レベルを15ppm以下に下げたULO鋼が1つの有効な手段であるとの見通しを得た.(2) 低酸素化 (ULO) および低TiN化 (UL・TiN) 処理を適用したULO+UL・TiN鋼は…