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。
Abstract Isomeric “ compact ” and “expanded” dendrimers functionalized with L ‐prolinamide catalytic units at the periphery were compared as catalysts to monomer controls in the organocatalytic direct aldol condensation. A positive dendritic effect that amplifies the stereoselectivity of the direct aldol condensation…
Selenium-filled double-walled carbon nanotubes (Se@DWNT) have been studied by high resolution transmission electron microscopy (HRTEM) and micro-Raman spectroscopy in the temperature interval from 80to600K employing 785nm excitation wavelength. The temperature dependences of the dominant bands (G-band and G′-band) are…
On the basis of data of IR spectroscopy and powder diffraction analysis, an aqueous solution of poly-N-vinylpyrrolidone was shown to interact with hydrated alumina and zirconia synthesized from corresponding metal chlorides by means of sol-gel technology. A change was shown in the nature of polymer interaction with in…
To investigate the ballistic resistance and failure pattern of aeroengine casing following the impact of disk fragments, and to determine the optimum case structure, the phenomena of a 1/3rd disk fragment impact on single and double-layered thin plate targets were simulated using nonlinear dynamical analysis software…
An analytical core loss formula and a dynamic hysteresis core loss model have been developed. Experimental data for different lamination thicknesses have been measured and analyzed at various frequencies. Based on the analysis, an analytical eddy current loss model considering skin effect and a dynamic hysteresis fini…
An Atmospheric Pressure Chemical Vapor Deposition (APCVD) system was implemented for SiO 2 nanometric films deposition on silicon substrates. Tetraethoxysilane (TEOS) and ozone (O 3 ) were used and they were mixed into the APCVD system. The deposition temperatures were very low, from 125 to 250 °C and the deposition t…
Strong electroluminescence was detected at room temperature from a p-i-n structure fabricated using crystalline silicon on glass technology. The luminescence spectra at small to moderate carrier injection levels contains strong peak with maximum at energy position Eph∼0.8 eV. Additionally, a broad emission band in the…
Isotope Effect on the Infrared Photoluminescence Decay of Interstitial Oxygen Molecules in Amorphous SiO2 , Kajihara, Koichi, Miura, Taisuke, Kamioka, Hayato, Hirano, Masahiro, Skuja, Linards, Hosono, Hideo
Abstract The relationships between polytypism and OD structures are discussed, with presentation of some examples in different classes of compounds: polymorphism and polytypism in 9,10 phenantrenequinone; OD structures in latiumite and tuscanite family; polytypism in kaolinite family. The basic elements of OD theory a…
Abstract Amino‐functionalized MCM‐41 has been prepared by grafting amino containing functional groups onto mesoporous silicate MCM‐41 and characterized by powder X‐ray diffraction, N 2 adsorption/desorption measurement, SEM, FT‐IR, thermogravimetry and elemental analysis to confirm the ordered mesoporous structure and…
Light and gas permeability, antimicrobic and physico-mechanical properties are studied of the films from the mixtures of fibroin with the synthetic polymers.
Single Crystal Growth and Magnetic, Optical, and Photoelectrical Properties of EuO Thin Film, Miyazaki, Hidetoshi, Ito, Takahiro, Im, Hojun, Terashima, Kensei, Yagi, Shinya, Kato, Masahiko, Soda, Kazuo, Kimura, Shin-ichi
Both undoped and Ag-doped ZnO nanostructures were prepared using an electrochemical process at temperatures between 60 and 95°C. The samples were characterized by scanning electron microscopy, x-ray diffraction, energy dispersive x-ray spectroscopy, and temperature dependent photoluminescence measurements (PL). The ef…
In order to improve the mechanical properties of boron carbide (B 4 C) ceramic, a mullite‐reinforced B 4 C matrix ceramic with complete densification was fabricated via hot pressing for the first time. The dense sintering mechanism of mullite‐reinforced B 4 C ceramic was discussed through the phase and element analysi…
Using the method of matrix diagonalization, we investigate an off-center D − in a spherical quantum dot (QD) subjected to a parabolic potential confinement. We discuss the effect of the position of an impurity in the QD on the binding energy of the D − system. Furthermore, we compare a negatively charged donor D − wit…
The present experimental work focuses on the growth of electrical treeing inside different Ethylene-vinyl acetate (EVA) nanocomposites containing Bohemite (an aluminum oxide hydroxide) and Montmorillonite (a phyllosilicate clay mineral) nanoparticles. Bohemite and Montmorillonite particles have different aspect ratios…
Results of a comparative investigation having the purpose to select the most appropriate Partial Discharge (PD) pattern for robust identification of defect typologies in insulation systems of ac rotating machines, are reported in this paper. PD measurements were performed on some Roebel bars affected by specific defec…
The deployment of radio frequency interference (RFI) measurement has gained increasing acceptance as a front line, non-invasive technique to assess the condition of individual high-voltage (HV) electrical equipment items as part of a substation surveillance program. However, successful detection and discrimination of…
A High-Throughput Screening System for Thermoelectric Material Exploration Based on a Combinatorial Film Approach, Otani, Makoto, Thomas, Evan L., Wong-Ng, Winnie, Schenck, Peter K., Chang, Kao-Shuo, Lowhorn, Nathan D., Green, Martin L., Ohguchi, Hiroyuki
Results obtained from exposure of nickel-based heat-resistant alloys to thermal fatigue tests carried out for several years are presented. A methodology of carrying out tests in vacuum is used, which makes it possible to observe incipience of microcracks and their propagation rate. Results obtained from a calculation…