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 Im System Zn/Mo/O sind mehrere ternäre Phasen bekannt. Bei 900°C sind die Phasen ZnMoO 4 , Zn 2 Mo 3 O 8 und Zn 3 Mo 2 O 9 stabil. Die Koexistenzgebiete sind am ternären Phasendiagramm dargestellt. Die Strukturbestimmung von Zn 3 Mo 2 O 9 erfolgte mit Röntgenbeugung an Einkristallen. Die Verbindung kristallis…
Strength measurements and fractography were used to investigate the failure of alumina‐glass dental composites containing 75 vol% alumina and 25 vol% glass. Alumina compacts were prepared by slip casting and sintering at 1100°C for 2 h. Dense composites were made by infiltrating partially sintered alumina with glass a…
High concentrations of total barium, ranging from 0.42 to 1.58 mg(middot)g(sup-1) (dry weight) were found in sludges of two sewage treatment plants near Florence, Italy. Barium concentrations in the suspended matter decreased as redox potential values changed from negative to positive. An anoxic sewage sludge sample w…
The structural, optical and related properties (i.e. photoluminescence, photoconductivity etc) of some synthetic (i.e. unconventional) three- and lower-dimensional semiconductor systems, which are based on inorganic units (:metal-halides, metal-chalcogenides etc), are briefly reviewed and some new results are reported…
Transition metal oxides are often used as the active components in heterogenous catalysis. Therefore the investigation of single crystal oxides as model systems is important to understand the reaction mechanisms on a microscopic level. The reactivity of a (111) surface of ionic rocksalt type structures seems to be rat…
This paper summarizes the Electricite de France experience with insulation coordination of gas-insulated substations (GIS). After a review of the insulation coordination practice, mainly dealing with fast front overvoltages and the one minute AC test, some results of the on-site test procedure applied for 30 years are…
Detailed theoretical studies of the temperature dependence of the zero-field splitting [characterized by \ensuremath{\Delta}D(T)=D(T)-D(0) or dD/dT] of ruby have been made by taking into account both the static contribution due to the thermal expansion of the lattice and the vibrational contribution due to the electro…
Abstract Cooling‐rate effects play an important role in polymer processing because the materials experience rapid cooling when transferring from melt states to solid states. The traditional Tait equation has been used widely in representing the volumetric behaviors of polymers as a function of temperature and pressure…
This study investigates a partial or complete replacement of synthetic sorbents by various biodegradable, natural sorbent materials. The sorbents examined are cotton, milkweed, kapok, wool, and kenaf fibers. It was found that (with the exception of kenaf) the oil sorption capacities of these natural sorbents (as loose…
The molten salt ${3\mathrm{K}\mathrm{N}\mathrm{O}}_{3}$-2Ca(${\mathrm{NO}}_{3}$${)}_{2}$ has been studied in the frequency range 5 mHz40 GHz and for temperatures 10 KT500 K using impedance spectroscopy. It is found that in the microwave regime the dynamic conductivity traces the primary response. In the radio- and aud…
We have been successful in obtaining temperature-stable crystallized thin film of (Zr,Sn)TiO4. Preferential (111)-oriented (Zr,Sn)TiO4 thin film was prepared by pulsed laser deposition. Effects of crystallization were elucidated based on a comparison of electric properties of crystallized and amorphous (Zr,Sn)TiO4 fil…
ABSTRACT The effects of ultrasound frequency, acoustic power, and exposure time on the functional properties of whey protein concentrate and sodium caseinate films were examined. Average tensile strength of the ultrasound treated caseinate films was 224% higher than that of the control. The ultrasonic process was more…
This work presents a comprehensive investigation of carrier transport properties in light-emitting porous silicon (LEPSi) devices. Models that explain the electrical characteristics and the electroluminescence properties of the LEPSi devices are developed. In metal/LEPSi devices, the forward current density–voltage (J…
Abstract A variety of nonblack fillers are used in the rubber components of tires. Calcium carbonate, clay, precipitated silica, talc and titanium dioxide are used in white sidewall compounds to impart desired physical properties and appearance. Precipitated silica can be used in black sidewall compounds, including no…
Small angle neutron scattering measurements were made on a series of block copolymer micelles that represent model systems for spherical polymer brushes. We find hyperbolic density profiles of the form ${r}^{\ensuremath{-}\ensuremath{\alpha}}$ with values of $\ensuremath{\alpha}$ between 1.05 and 1.35. This as well as…
Polyurethanes are considered to be one of the most bio- and blood-compatible biomaterials known today. By intelligent utilization of principles governing the structure/property relationship of these polymers, one can generate systems which resemble, in principle, the physical-mechanical behavior of living tissue. Thus…
The kinetics of simultaneous dehydroxylation and carbonation of precipitated Mg(OH) 2 were studied using isothermal and nonisothermal thermogravimetric analyses. Specimens were analyzed using X‐ray diffraction, transmission electron microscopy, and through measurements of the volume of carbon dioxide evolved in a subs…
To assess the suitability of bismuth germanate as an electro-optic material for high precision applications, we have confirmed and extended previous data on its refractive index, electro-optic tensor element r(41), and thermal expansion coefficient. In addition, we have measured the thermo-optic coefficient dn/dT, the…
Abstract A model is presented for free expansion polymer foam processing that includes simultaneous nucleation and bubble growth. The nucleation model includes dissolved gas, small critical cluster size, elastic, and non‐ideal solution effects. An influence volume approach, which couples nucleation and bubble growth,…
Abstract A novel class of low-molecular-weight organic gels has been developed; N,N′,N″-tristearyltrimesamide (TSTA) forms gels with various organic solvents, immobilizing solvent at a low concentration of TSTA. The gels, which form fibrous bundles leading to three-dimensional networks, exhibit well-defined sol-gel tr…