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。
The migration of boundaries between single crystal and polycrystalline ZnO was investigated using single crystals with well‐defined crystallographic faces. The migration rate of the basal (0001) planes through polycrystalline ZnO depended on the crystallographic polarity of the basal plane. Grain boundary migration in…
This review focuses on the reactions of ethanol on the surfaces of platinum, palladium, rhodium and gold supported on ceria (of size 10-20 nm). The bimetallic compounds: Pt-Rh, Rh-Au, Rh-Pd, and Pt-Pd were also investigated. Initially this work was aimed at understanding the roles of the different components of automo…
Yttria−alumina (YA) glasses containing 59.8−75.6 mol % Al 2 O 3 were synthesized in the form of 1−3.5 mm diameter spheroids using containerless techniques. The glasses formed at cooling rates ranging from <70 K/s at compositions near 72 mol % Al 2 O 3 and up to 300 K/s at the ends of the composition range. Samples wit…
Effects of Ag addition on sintering of a crystallizable CaO‐B 2 O 3 ‐SiO 2 glass have been investigated at 700°–900°C in different atmospheres. With Ag content increasing in the range of 1–10 vol%, the softening point, the densification, the onset crystallization temperature, and the total amount of crystalline phase…
Improved structures of MgO carbon bonded materials due to new binder systems and due to the application of electrical currents during operation have been achieved for advanced applications in the secondary metallurgy and during near net shape metal casting.
Amorphous melt-spun ribbons of an Nd/sub 4/Fe/sub 77.5/B/sub 18.5/ alloy were consolidated into bulk materials by a spark plasma sintering method. The resultant bulk materials were amorphous when the ribbons were consolidated at 773 K. The amorphous bulk materials showed a low coercivity as expected for amorphous Nd-F…
The in-situ conformations of peptide layers formed from the adsorption of two different synthetic 15-mer peptides at the hydrophilic silicon oxide/aqueous solution interface have been determined using neutron reflectivity (NR). The first peptide is based on the native sequence of a protein-binding domain within a hete…
There has been a long interest and history in using porphyrins for applications in Photodynamic Therapy (PDT) for cancer treatment. These applications arise from their photosensitizing and phototoxic properties. PDT combines a photosensitizer and light to produce highly toxic singlet oxygen and therefore destroy any u…
The major barrier to accelerating the transition from 2D fabric lamination to integral 3D textile preforms is the high costs. Toward this end, substantial researches have been conducted. This paper reports on a conventional approach to the forming of 3D flat woven preforms in a shuttle-weaving machine. The factors in…
The gas (air and hydrogen) flow through porous silicon ($\mathrm{PS}$) nanostructures is studied. Being well described by Darcy's law, the gas flow measurements allow us to deduce PS permeability values, which are measured to be ${10}^{--16}--{10}^{\ensuremath{-}15}\phantom{\rule{0.3em}{0ex}}{\mathrm{m}}^{2}$, corresp…
Three-dimensional fibre-reinforced polymer composites made by the textile processes of weaving, braiding, stitching and knitting have tremendous potential for improving the performance of composite structures and reducing their cost of manufacture. Current applications of three-dimensional composites are described, in…
The FoldMiner web server (http://foldminer.stanford.edu/) provides remote access to methods for protein structure alignment and unsupervised motif discovery. FoldMiner is unique among such algorithms in that it improves both the motif definition and the sensitivity of a structural similarity search by combining the se…
Two branch-line couplers are introduced that utilize a combination of regular microstrip (MS) and negative-refractive-index (NRI) lines. Interesting phase compensation (0/spl deg/ phase shift) at the output port and a choice of /spl plusmn/90/spl deg/ phase shift at the through port, with respect to the input, are pos…
The rheological properties of wood fiber reinforced thermoplastics blends are important to practical industry application, however few research is available regarding this field. In this study, a C. W. Brabender Plasti-Corder torque rheometer was used to examine the flow behavior of wood flour filled polypropylene (PP…
The ultraviolet absorption and emission spectra of Ce 3+ doped phosphate glasses based on gadolinium and sodium phosphates are studied in the present work. Compared with the cerium‐free phosphate glass matrixes, CePO 4 doping shifts the ultraviolet absorption edge of glasses into the longer wavelength because of the 4…
We study morphological transitions between microphase-separated structures in diblock copolymers. By means of the two-mode approximation, kinetics of order−disorder (ODT) and order−order transitions (OOT) in the weak-segregation limit are investigated by solving numerically a coupled set of the amplitude equations for…
The crystal structure of ramsdellite, MnO 2 , was refined using time-of-flight powder neutron diffraction data and the Rietveld method in order to assess the effects of reduction in cathodic battery materials. For the first time, we present a refined structure for “groutellite,” a heretofore poorly characterized phase…
Abstract Carboxymethyl starches (CMS) with a degree of substitution (DS) in the range of 0.5 to 1.5 and reagent yields about 70% were synthesised under heterogeneous reaction conditions. Starting from a standard procedure for manufacturing low substituted CMS the molar ratios of the reagents were increased. Under thes…
The dynamic compressive responses of AD995 alumina have been determined as a function of loading rates and damage levels. To determine the dynamic properties under loading conditions simulating those encountered in ceramic armors subjected to impact, a novel dynamic compressive experimental technique modified from a s…
Tetrafluoroborate ion (BF(4)(-)) serves as a powerful and better-behaved promoter than fluoride ion (F(-)) for hydrolytic condensation of alkoxysilanes, such as tetraethoxy orthosilicate, in aqueous media containing amphiphiles with onium ion headgroups as templates, affording thermally and hydrothermally stable mesop…