Materials Literature
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The dielectric properties of Na 0.5 Bi 0.5 TiO 3 (NBT) ‐based composites incorporating silver particles prepared by sintering at a low temperature of ∼900°C are reported. The dielectric constant increases with the amount of metal silver particles in the measured frequency range (150 Hz to 1 MHz), and could be enhanced…
Investigates the influence of various additives on the dispersion and setting behavior of ultralow cement content (ULC) refractory castables in the U.S. Reason for the evaluation of ULC refractory castables; Essential to improve properties at high temperature through the formation of needlelike mullite grains; Use to…
Ceramic samples of the melilite‐type La 1+ x Sr 1– x Ga 3 O 7–δ ( x =−0.15 to 0.60) compound were prepared by conventional ceramic processing. Sintering characteristics and microstructural evolution were studied. A phase diagram study was performed to establish the solid solubility limits as a function of the La:Sr ra…
Concentrated sugar solutions are prototypical glass formers with a wide application in food technology and cyropreservation, but the microscopic mechanisms underlying these processes remain obscure. To uncover these microscopic details, we study the structure and dynamics of binary glucose−water mixtures by means of a…
Abstract Compatibilized polypropylene/polyamide 6 blends were prepared with polypropylene, ε‐caprolactam and maleic anhydride grafted polypropylene via in situ polymerization and in situ compatibilization in a batch mixer. Scanning electron microscopy and differential scanning calorimetric analysis showed that the com…
The phase diagram of the CaO–Al 2 O 3 –SiO 2 –CaSO 4 –CaCO 3 –H 2 O system relevant to cement has been calculated at 25°C and 1 bar pressure. It is composed of 331 stable phase assemblages in equilibrium with the aqueous phase and contains 30 invariant points with 15 solids. Thaumasite appears to be a stable phase wit…
Three processes for the selective non-catalytic removal (SNCR) of nitric oxides from engine exhaust gases are compared. The three processes are similar but each uses a different chemical agent: ammonia, urea, or cyanuric acid. A number of operating conditions have been studied. In particular, results for the removal o…
We propose a novel broadband polarizing beam splitter with a compact sandwich structure that has a subwavelength grating in the quasi-static domain as the filling. The design is based on effective-medium theory an anisotropic thin-film theory, and the performance is investigated with rigorous coupled-wave theory. The…
Abstract Summary: Langmuir monolayers and organized molecular films of comb polymers containing different kinds of fluorocarbon side‐chains with various chain lengths and substituted atoms at the ω ‐position were characterized by surface pressure‐area isotherms as well as Brewster angle microscopy on a water surface a…
We describe a highly stable glass family based on the combination of TeO/sub 2/ with heavy metal-oxides of Nb, Ti, W. We show that these glasses have large Raman gain, a broad Raman spectrum, and large negative dispersion. They are, thus, potentially useful in a variety of specialty fiber applications, such as discret…
Abstract Summary: Attempts were made to prepare thermoplastic elastomers (TPE) from scrap rubber powder (SRP) and linear low‐density polyethylene (LLDPE) as thermoplastic polymer matrix. The solid‐phase grafted copolymer of LLDPE (LLDPE‐g‐VM) and epoxidized natural rubber (ENR) were used as dual compatibilizers to imp…
The ability to manipulate the local molecular environment is crucial to access fundamentally new classes of organic functional materials with unprecedented properties and performance. Despite the progress of the last ten years in the area of organic semiconductors for electronics and optoelectronics, much remains to b…
Recent advances in high-purity and high-yield catalytic chemical vapor deposition (CVD) generation of single-walled carbon nanotubes (SWNTs) from alcohol are comprehensively presented and discussed on the basis of results obtained from both experimental and numerical investigations. We have uniquely adopted alcohol as…
This study investigated nonthermal plasma process combined with monolithic V/sub 2/O/sub 5//TiO/sub 2/ catalyst for the removal of nitrogen oxides. The combination process was made in either one-stage (generation of plasma inside catalyst) or two-stage process (plasma reactor, followed by catalyst) in order to underst…
FBPA (fructose-1,6-bisphosphate aldolase) catalyses the reversible aldol condensation of glyceraldehyde 3-phosphate and dihydroxyacetone phosphate to form fructose 1,6-bisphosphate. Two classes of FBPA, which rely on different reaction mechanisms, have so far been discovered, class I mainly found in Eucarya and class…
A low‐temperature cofired ferroelectric ceramic composition for electrically tunable radio frequency devices is introduced. A sintering temperature of 950°C for BaSrTiO 3 –MgO was obtained following the combined addition of B 2 O 3 and Li 2 CO 3 . The effects of these sintering aids on densification, microstructure, a…
Bulk ultrafine‐grained (UFG) materials, produced by severe plastic deformation (SPD) have recently received considerable scientific attention. In this work the authors explore, whether the so‐called “paradox of ductility and strength” is also true for UFG Aluminium produced by an Accumulative Roll Bonding (ARB) proces…
Abstract Summary: Crystallization analysis fractionation (Crystaf) is a technique for estimating the chemical composition distribution (CCD) of semi‐crystalline copolymers. Cocrystallization may happen during Crystaf analysis, affecting Crystaf profiles and leading to misinterpretation of the CCD. This study investiga…
[structure: see text] The demetalation of M(III)(HCTPPO)Br (M = Mn or Fe) afforded two hydroxylated N-confused porphyrinoids. CTPPOH retains the tautomer form of the N-confused porphyrin with a hydroxyl group substituted in the inner-core carbon. The further attack of OH(-) to the meso carbon afforded a dihydroxylated…
Abstract A Raman spectroscopic study on the organo‐montmorillonites prepared at different concentrations provided detailed observations about the ordering conformation of HDTMA + ions confined within the montmorillonite interlayer. The ordering conformation shows a strong dependence on the concentration of the confine…