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。
An epitaxial ZnO thin film was entirely fabricated by pulsed laser deposition. Both the orientation and the size of the crystallites were studied. The X-ray diffraction (XRD) patterns of the film show strong c -axis oriented crystal structure with preferred (002) orientation. The Phi-scan XRD pattern confirms that the…
The ternary compound Cu 3 TaS 4 has been investigated by means of X-ray powder diffraction and its structure has been refined by the Rietveld method. This compound is isostructural with the sulvanite mineral Cu 3 VS 4 , and crystallizes in the cubic P 43m space group (No. 215), Z = 1, with unit cell parameters a = 5.5…
This paper presents a design study of a 3-phase AC main exciter (ME) for an aircraft starter-generator. A computationally efficient methodology for optimizing the design of the ME is presented. The optimisation is carried out using coupled two-dimensional (2D) magnetostatic finite element solver and particle swarm opt…
Thin films of thermochromic vanadium dioxide have been the subject of intensive research in recent years year due to their postulated use as "intelligent" window coatings. The usefulness of such technology depends on a semi-conducting to metal transition with an associated change in infra-red optical properties. This…
The agricultural wastes from harvesting corn, viz. corn husks and corn cobs were used as raw materials for the preparation of microcrystalline cellulose. From chemical composition analysis, holocellulose, -cellulose, hemicellulose, extractive and ash contents found in the corn husk were higher than those in the corn…
Phase relations, dielectric and piezoelectric properties are reported for the ternary system 98%[(1 - x) (Na(0.5)K(0.5)NbO(3))-x(LiTaO(3))]-2%[BiScO(3)] for compositions x ≤ 10 mol% LiTaO(3). The phase content at room-temperature changed from mixed phase, monoclinic + tetragonal, for unmodified 98%(Na(0.5)K(0.5)NbO(3)…
A ceramic slurry that contains a 6H-type Ba(Ti 0.95 Mn 0.05 )O 3 powder was casted into a plaster mold under 10 T magnetic field to form a green compact of (0001)-oriented Ba(Ti 0.95 Mn 0.05 )O 3 . After sintering the green compact at 1300 °C in air, it was confirmed that the (0001)-oriented 6H-type perovskite structu…
Single crystalline, sub-15 nm BaZr(x)Ti(1-x)O(3) (0 ≤x≤ 1) nanocrystals were synthesized at room temperature via the vapor diffusion sol-gel method. As-prepared nanocrystals exhibit noncentrosymmetric regions whose volume fraction increases significantly upon substitution of small amounts of Zr(4+) for Ti(4+) and reac…
The effect of interstitial hydrogen atoms on the mechanical properties and plastic strain localization patterns in tensile tested Fe-18Cr-12Ni-2Mo single crystals of austenite steel with low stacking-fault energy has been studied using a double-exposure speckle photography technique. The main parameters of plastic-flo…
We have confirmed a high dielectric constant after poling ε 33 T /ε 0 of 7700 and piezoelectric constant d 33 = 2250 pC/N, which are 40% larger than those of the initial sample, for a lead magnesium niobate–lead titanate 0.72 Pb(Mg 1/3 Nb 2/3 )O 3 –0.28 PbTiO 3 single crystal plate with a manganese oxide/gold (Au) com…
The dynamic response of an intrinsic lattice strain in a tetragonal BaTiO 3 single crystal to an electric field is investigated. Time-resolved diffraction measurement using high-energy synchrotron radiation enables us to detect the time dependence of the small change in the tetragonality of BaTiO 3 during polarization…
In the present paper, a hydrodynamic bird material model made up of water and air mixture is developed, which produces good correlation with the measured strain-gauge test data in a panel test. This parametric bird projectile model is used to generate the time-history of the transient dynamic loads on the turbofan eng…
This study determined the efficacy of silver-zeolite impregnated into wrapping paper to reduce the bacterial growth on raw beef, pork and turkey cuts. This was compared with that of regular butcher paper. The samples were inoculated with Pseudomonas putida (psychrotrophic spoilage bacterium) and stored on 4% silver-ze…
The nonlinear behaviors and high-power properties of two lead-free piezoelectric ceramics – (Bi 1/2 Na 1/2 ) 0.85 Ba 0.15 Ti 0.98 Mn 0.02 O 3 (BNBTM) and Sr 1.9 Ca 0.1 NaNb 5 O 15 (SCNN) – were clarified by comparison of their mechanical characteristics using the continuous driving method. BNBTM ceramics exhibited jum…
A series of benzoporphycenes and naphthoporphycenes and their zinc complexes were prepared from bicyclo[2.2.2]octadiene fused porphycenes by a retro-Diels-Alder reaction and their photophysical properties were studied. Free-base tetranaphthoporphycene was not soluble in common organic solvents, but zinc tetranaphthopo…
Quantum dots have emerged with great promise for biological applications as fluorescent markers for immunostaining, labels for intracellular trafficking, and photosensitizers for photodynamic therapy. However, upon entry into a cell, quantum dots are trapped and their fluorescence is quenched in endocytic vesicles suc…
In the continuation of our study of the role of direction of the linking ester group and lateral substitution, we present three series of bent-core liquid crystals based on 7-hydroxynaphthalene-2-carboxylic acid. The mesomorphic properties were investigated by polarised optical microscopy, differential scanning calori…
A bi-functional, conductive and superhydrophobic, graphene-based nanostructured hybrid material was fabricated. In order to construct the bi-functional hybrid material, carbon nanotubes (CNT) and polyhedral oligomeric silsesquioxane (POSS) were introduced. The water contact angle (WCA) of the graphene/POSS/CNT coating…
Theoretical studies, using the multireference correlation consistent composite approach (MR-ccCA), have been carried out on the ground and lowest lying spin-forbidden excited states of a series of silicon-containing systems. The MR-ccCA method is the multireference equivalent of the successful single reference ccCA me…
The reaction of hydrolysis lignin with orthophosphoric acid and urea under the conditions of reactant fusion without a solvent was studied. The influence of the reactant ratio and of the reaction temperature and time on the degree of chemical binding of phosphorus and nitrogen with lignin was examined. The modificatio…