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 Cu 2 (SeO 3 ) 2 · H 2 O and Tl(III) 2 Cu 3 (SeO 3 ) 6 were obtained in the course of low-hydrothermal experiments on natrochalcite-type selenate representatives. The crystal structures were determined by direct methods from single-crystal X-ray diffraction data collected with a CCD area detector. Cu 2 (SeO 3…
The water-soluble organophosphorus compound, namely, hexahydroxymethylamidocyclotriphosphatriazatriene (HHMAPT) was synthesized by reacting phosphonitrile chloride with liquid ammonia followed by reaction with formaldehyde. It is rich in phosphorus and nitrogen and as a polyfunctional compound it can undergo several r…
The spinodal decomposition (SD) kinetics of the mixture of polystyrene (PS) and a low molar mass liquid crystal (LC) (E7) has been studied by means of time-resolved small angle light scattering (SALS) and polarized optical microscopy (POM). It is found that, in the isotropic spinodal region, the mixture first undergoe…
An experimental study has been conducted to investigate the effects of grain transport on the columnar to equiaxed transition (CET) in dendritic alloy solidification. Using the aqueous ammonium chloride solution as a transparent model alloy, experiments were performed in a vertical test cell with cooling from the top,…
Interest in mordenite as an inhalation hazard arose when it was discovered that the mineral exists in the subsurface of Yucca Mountain, NV, the site of a federally proposed nuclear waste repository. During preliminary geologic investigations at Yucca Mountain, workers performing air coring (dry-drilling) operations we…
In the fabrication of broad band optical waveguide modulators, a certain technology must be used to prepare 15–20-μm-thick Au electrodes on the SiO2 surface covering the waveguides. A thin transition metal film is commonly inserted between the Au and SiO2 to improve adhesive strength. The transition metal film used in…
An experimental study has been performed to gain some insight into the correlations between the deposition conditions and the structure of boron nitride (BN) coatings that are used in ceramic‐matrix composites. BN has been deposited at 700°C from BCl 3 ‐NH 3 ‐H 2 mixtures on various substrates, by using chemical vapor…
Previous extensive measurements of the growth rates of the (110) face of tetragonal lysozyme crystals have shown unexpected dependencies on the supersaturation. In this study, similar growth-rate measurements were performed for the (101) faces of the crystals. The data show a similar dependence on the supersaturation,…
This paper reports the recent progress in the ideal fabrics project that started in 1996. The aim of this project is to initiate the engineered manufacturing of “ideal fabric”. Ideal fabric is the fabric which satisfies the three conditions, good hand, good appearance of suit, and mechanical comfort for wear. The obje…
The constant concentration (CC), constant flux (CF), flux continuity (FC), and hybrid of flux continuity and constant concentration (FCCC) boundary conditions for electrochemical hydrogen permeation through iron or steel samples are reviewed and used to evaluate the hydrogen diffusivity from the permeation tests on fu…
Two new techniques in X-ray absorption spectroscopy (XAS) have recently been developed which provide previously unobtainable information on supported noble metal catalysts. Atomic X-ray absorption fine structure (AXAFS) provides direct information on the average changes in interatomic potential of the metal particles…
The EL technique is at least two orders of magnitude more sensitive than PD detection and can detect the initiation of polymeric ageing. It can also detect the conversion of a water tree to an electrical tree.
ABSTRACT This study used the approach taken by Bourne to obtain the compressive and shear components for an agar gel. But in addition, the low strain regime for the same experiments was used to evaluate the gel's elastic modulus using the theory of elasticity. Compression testing, using lubricated teflon platens and a…
We investigated the limits of applicability of the interference approximation (ITA), which is often used to calculate light fields in dispersive media with high particle concentrations. We analyzed the conditions under which the use of the ITA leads to an error in calculation of the dispersive-medium extinction coeffi…
Geopolymer apron cassava starch/BC/Fe3O4/glycerin has been synthesized for various amount of Fe3O4 (0.5%, 1%, and 1.5%) into cassava starch and black carbon (BC) solutions. The quantitative analysis from Fourier transforms infra-red (FTIR) was used to determine the optical properties, dielectric function, energy loss…
Aluminum is highly abundant in the Earth's crust where it is present in a wide variety of primary and secondary aluminosilicate minerals, amorphous phases, and aqueous solution species. The speciation and coordination of AI in many of these phases, particularly those that are X-ray amorphous or present as thin surface…
TiCl4 or titanium isopropoxide reacted with citric acid to form a titanyl citrate precipitate. Barium strontium citrate solutions were then added to the titanyl citrate reaction to form gels. These gels were dried and calcined to (Ba,Sr)TiO3 powders. The gels and powders were characterized by DSC/TGA, IR, SEM and XRD…
Pt I~u and Ln-edges XANES clarified the oxidation state of platinum catalysts supported on various metal oxides. The acidbase property seemed one of the most dominant factors to control the electron state of platinum. On the reduced samples, there was a tendency that acidic support reduced the 5d-electron density of p…
The temperature coefficient of the dielectric permittivity (τϵ) and resonant frequency (τf) of perovskites and related materials is important in the application of these ceramics to microwave filters and resonators. Recent work has directly related changes in τϵ, and therefore τf, to the onset of octahedral tilting in…
Changes in fabric structure as hygroscopic fibers swell at high humidities can have a large influence on the measured air permeability of fabrics such as cotton, wool, silk, and nylon. The variation of air permeability as a function of relative humidity is of practical importance in ranking and evaluating candidate te…