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。
In this work, the hazardous properties of solvent base adhesive wastes generated in the footwear manufacturing process have been studied. The characterisation procedures and criteria used are those contained in the legal documents European Union Council Decision 94/904/CE and October 13th Spanish Ministerial Order. Th…
When a surface of a silicon wafer, on which a nanometer-thin SiO 2 layer is selectively formed, is observed by a scanning electron microscope (SEM), the brightness of the SEM image at the SiO 2 portion is stronger than that of the bare Si portion, and the brightness increases with the increasing thickness of the SiO 2…
Four thermoplastic elastomers having the structure of poly(ether-ester-imide)s, PEEIs, were prepared and characterized. The hard segments were synthesized from 1,4-dihydroxybutane and from an imide dicarboxylic acid based on 1,6-diaminohexane and trimellitic anhydride. Poly(tetramethylene oxide)-1000, poly(ethylene ox…
<abstract language="eng">The compounds 5-nitro-8-quinolinol and 5,7-dinitro-8-quinolinol were obtained by nitration of the chelant 8-quinolinol. The compounds were characterized through EA, MNR, XRD, IR, TG, DTA and DSC. It was verified through thermal analysis that the compounds show consecutive processes of sublimat…
Reducing-atmosphere treatment at 400°C for 10 min was performed on sol–gel-derived Pb(Zr,Ti)O 3 (PZT) thin films, which were spin-coated on a LaNiO 3 /Pt/Ti/SiO 2 /Si substrate and annealed. The reducing atmosphere does not produce any significant change of the preferred orientation perovskite structure of these ferro…
Heteropoly acid entraped in nano silica matrix was prepared by the microemulsions method. The primary particle size was less than 400nm and it decreased with the content of the heteropoly acid. When these silica particles were blended with sulfonated polyethersulfone, the HPA could be effectively immobilized in aqueou…
Molecular mobility in sorbitol and maltitol is studied in order to understand their differences near the junction between the α and β relaxations. The molecular dynamics simulations performed on the polyols in their bulk state give support to the 13C NMR results and imply that the mobility of a carbon atom located at…
Supramolecular side chain liquid crystalline polymers were prepared from poly(3-carboxypropylmethylsiloxane) (PSI100) and azobenzene derivatives through intermolecular hydrogen bonding (H-bonding) between the carboxylic acid groups in the PSI100 and the imidazole rings in the azobenzene derivatives. The existence of H…
The effect of oxygen content on the electrical transport properties of La0.4Ca0.6MnO3—y was studied. Upon decreasing oxygen content, the lattice parameters a, b and c of the samples increase and the electrical resistivity of the samples also increases abruptly, contradicting what is expected in terms of Mn4+/Mn3+ rati…
The stress and displacement fields in an edge‐cracked sheet specimen made of a solid propellant and subjected to a uniform displacement along its upper and lower faces was studied. The solid propellant was simulated as a hyperelastic material with constitutive behaviour described by the Ogden strain energy potential.…
Sol-gel colloidal suspensions were used to elaborate ZnGa2O4 films by spin coating on glass and MgO substrates. Those films were annealed at 600 °C (10°/min) for l h in air and showed good mechanical resistance as well as very good transparency. XPS spectra recorded from 0 to 1200 eV indicated that the films contained…
Interactions of certain stainless steels (UNS S30400, S31603 S32205, S32304, hard chromium plated S31603 as well as hard chromium plated S32205) and sulphur anions in concentrations typical of kraft liquors were investigated using wave length dispersive X-ray fluorescence (WDXRF) and contact electric resistance (CER)…
Abstract A new kind of polysilazane precursor containing linear–cyclic structure was synthesized from the de‐lithium chloride condensation reaction of hexamethylcyclotrisilazane lithium salts (D ) and 1,3‐dichlorotetraorganodisilazanes [(ClR 1 R 2 Si) 2 NH]. Pyrolyses of these precursors and some comparable linear pol…
Residual stress of methylsilsequioxane film, which was spin-coated on silicon substrate and followed by soft-baking, was measured in-situ during curing and subsequent cooling with varying processing conditions. The thickness and refractive index of the cured films were measured using ellipsometry. Their structure was…
Creases are marks that are created and left in a fabric during garment wear. Pressing is a process to flatten garment panels and sharpen garment edges and pleats. To minimize crease, the fabric should recover after pressing without creating a creased edge. Whereas, good pressing performance means the creased edge stay…
The Stokes shift between the 2F5/2 → 5d absorption and the 5d → 2F5/2 emission of Ce3+ is known for at least 230 different inorganic compounds. Compounds with an anion coordination polyhedron around the Ce3+ ion either in the form of a tri-capped trigonal prism, Edshammer polyhedron or in the form of a (anti)-cuboctah…
Slowly cooled Nd 1 − x Ba x CoO 3 − δ samples were two-phase in the concentration interval 0.3 ≤ x ≤ 0.46. One of the phases had O -orthorhombic lattice distortions ( Pbnm ) characteristic of ferromagnetic samples with x ≤ 0.3, and the other phase had tetragonal distortions ( P 4/ mmm ) characteristic of samples with…
Using measurements of reflectance, transmittance, and the ellipsometric parameter D, we have determined the thickness, refractive index, and the absorption coefficient of various thin films and thin-film stacks. (D, the relative phase between the p- and s-polarized components, is measured for both reflected and transm…
The synthesis of a series of banana-shaped mesogenic structures has been carried out, in which the bend unit is formed by the 3,6-substitution of carbazole by 4-alkoxyphenyl moieties. The crystal structures of the methoxy and propyloxy derivatives are reported with an analysis of the N-H…π interactions that are observ…
The electrical conduction properties of dense BaCe0.9Mn0.1O3-delta (BCM10) membrane were investigated in the temperature range of 600-900 degreesC. High ionic and electronic conductivities at elevated temperatures make BCM10 a potential ceramic material for hydrogen separation. Hydrogen permeation through BCM10 membra…