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。
Multi-layer laminates were produced using alternating layers of Si3N4 and Si3N4+TiN. The differences in the coefficient of thermal expansions between the alternating layers lead to residual stresses after cooling. These are compressive in the Si3N4 layers and tensile in the Si3N4+TiN layers. The existence of these str…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Subhadra Gupta, Earl Ada; Optimization of process parameters to achieve high quality as-deposited…
The title compounds were synthesized at temperatures between 775 and 1175 K from (mostly stoichiometric) mixtures of Fe 2 O 3 , elemental rubidium or potassium (A) and their hyperoxides AO 2 . The structures have been determined by single crystal X-ray diffraction. The alkaline rich ferrate(III) Rb 8 [Fe 2 O 7 ] (Cs 8…
The inhibition of corrosion of mild steel in 0.01-0.1 N HC1 solutions by N-cyclohexy1-N-pheny1 thiourea (CPTU) has been studied using potentiodynamic polarization technique. Results obtained reveal that CPTU performs excellently as anodic inhibitor for mild steel in HC1 solution. The inhibitor functions through adsorp…
A thin-film-based thermoelectric micro-cooler has been studied and realized using the standard integrated circuit (IC) fabrication technology and bulk micromachining technology in sequence. The whole fabrication process is kept IC compatible by postponing potassium hydroxide (KOH) etching step to the last part of the…
Pyrazole functionalized cross-linked polystyrene resins with three carbon spacer groups between backbone and functionality were prepared. Complexation studies with transition metal ions such as Fe(III), Co(II), Ni(II) and Cu(II) reveal effective coordination of the pyrazole functionalized ligands. The structural facto…
The design of composite materials leads to the development of multi-component systems where each constituent has a specific function in the material, from technological and/or application points of view. Examples of such composite systems are the cordierite-mullite refractory materials investigated in this contributio…
The structural and magneto-optical properties of “porous silicon-cobalt” nanocomposites prepared through electrochemical deposition on silicon substrates of different porosities are investigated. It is revealed that, under galvanostatic conditions, cobalt micrograins are formed only in a surface layer of porous silico…
The Fe-Mo/ZSM-5 catalysts were prepared by an impregnation method. A comparison of the catalytic activity for the reduction of NOx with ammonia over Fe-Mo/ZSM-5, Fe-ZSM-5 and Mo/ZSM-5 catalysts was carried out. Also, the effects of the conditions used for calcination as well as of the Fe/Mo ratio on the catalytic perf…
The theoretical and experimental investigation of ferroelectric nanopowders is performed. The manifestation in radiospectroscopy spectra of size driven ferroelectric-paraelectric phase transition at some critical particle average size R = R c was the main goal of the consideration. In theoretical part the size effect…
Lead-zirconate-titanate (PZT) ceramics with zirconate-titanate (65:35) have been synthesised with the substitution of lanthanum (6, 7 and 8 mol %). Samples were prepared by solid-state reaction route.The x-ray diffraction study shows the formation of a single phase with rhombohedral structure. There is a transformatio…
Using a newly developed pulsed dc sputtering source with unbalanced magnetrons, we deposited advanced inorganic functional thin films such as TiO2, TiN, and TiO2∕TiN∕TiO2 on glass at 200°C at rates 3 to 4 times greater than those deposited by conventional dc sputtering. The TiO2(101) and TiN(100) thin films were stoic…
The infrared transmittance spectra and dark conductivity of wafers fabricated from nanocrystalline silicon powder ( nc -Si) have been studied. The initial nc -Si powder is first synthesized by laser-induced silane dissociation, with the temperature of the surrounding buffer gas varied from 20 to 250°C, and then compac…
X-ray spectroscopy has been used to obtain data on the local electronic and atomic structure of a -Si x C 1− x :H(Er) alloys produced by plasma-enhanced chemical vapor deposition (PECVD) with various relative amounts of silane and methane in the gas mixture ( x =0.3–0.9). It is shown that the alloys contain silicon an…
In this work, aniline was polymerized directly to the polyaniline‐sulfate salt without using a protonic acid. The polyaniline‐sulfate salt was prepared by emulsion polymerization, using a non ionic surfactant such as poly(ethylene glycol)–block poly(propylene glycol)‐block poly(ethylene glycol). In the aniline oxidati…
A molecular modelling capability for predicting the purity and morphology of solids manufactured via crystallisation is important in the realisation of a ‘molecule-up’ or product-centred, approach for the optimisation of chemical processes. Recent work on producing the morphology of molecular solids based upon the mol…
New vacuum gauges with emitters based on carbon nanotubes (CNTs) are described. The relation between the field emission from CNTs and the residual pressure in the vacuum chamber is considered. The operation of the proposed pressure sensor obeys the electric discharge theory based on the Paschen law, whereby the pressu…
The decomposition of hydrogen peroxide catalyzed by mixed ligand cobalt (II) and nickel (II) complexes as heterogeneous catalysts and adsorbate on alumina has been investigated by measuring the evolution of oxygen at different time intervals between 35-60°C. The effect of variation in the concentration of hydrogen per…
A conducting composite of polythiophene (PTh) with polyacrylamide (PAA) as the insulating matrix was prepared via electrochemical methods. The change in the conductivity of composites was analyzed as a function of the percent composition of the insulating component. The characterization of the composite was done by FT…
Hydroentanglement is the fastest growing bonding method in the nonwoven arena. Its strengths are good fabric aesthetics, and the lack of any complex binder chemistry with its inherent environmental concerns. Hydroentanglement is used for mechanically bonding both staple and filament nonwovens as well as being used for…