Materials Literature
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Synopsis The steady states of the Cahn–Hilliard equation are studied as a function of interval length, L , and average mass, m . We count the number of nontrivial monotone increasing steady state solutions and demonstrate that if m lies within the spinodal region then for a.e. there is an even number of such solutions…
We propose a simple model for the chevron structure observed in recent experiments by cooling a smectic A liquid crystal. We discuss the influence of the cell thickness and of the anchoring conditions on the temperature dependence of the layer tilt angle, and the formation of this structure in the vicinity of a smecti…
The structures of many binary solid-state chalcogenides (chalcogen = S, Se, Te) are known along with the structures of the related ternaries formed by addition of an alkali metal. Similarly, the structures of many ternary solid-state chalcogenides are known along with the structures of the related quaternaries formed…
"Electron theory in alloy design." International Materials Reviews, 38(3), pp. 154–155
Sol-gel entrapped Rh–, Pt–and Co-ammonium ion pairs formed by polymerization of (MeO)4Si in the presence of the appropriate metal halides and quaternary ammonium salts, are highly stable, efficient and recyclable hydrogen transfer catalysts.
[Bi(C6H6)Cl3, obtained from a benzene solution of BiCl3, has been shown by X-ray crystallography to be a layer polymer with very weak bismuth–benzene π-bonding.
X-ray analysis of Sn2P2(S1 − xSex)6 single crystals with 0 < x < 1 is performed in the temperature interval 70 to 400 K in which there exist the incommensurate modulated structures. Crystallographic characteristics of the modulation wave are obtained: the direction of a wave vector q at an angle 9° with respect to the…
The problems commonly encountered in the numerical analysis of reinforced structures are often related to biaxial stress states in the structure. In this study this problem is solved with the formulation of a composite plasticity model which describes both cracking and crushing of concrete within the framework of plas…
The adsorption of cationic potato starch on microcrystalline cellulose was investigated taking into account that starch is a mixture of amylose and amylopectin. The separate adsorption of both components could be calculated by determining starch concentrations twice using two methods having a different sensitivity for…
The general expression for angularly integrated electron-energy-loss functions for anisotropic materials is derived for arbitrary specimen orientations with respect to the incident angle of a fast electron. For uniaxial (tetragonal, trigonal and hexagonal) and biaxial (orthorhombic) crystal systems, the angularly inte…
The luminescence excitation and emission spectra of europium(III) and terbium(III) complexes of ethylenediamine (en) in dimethyl sulfoxide have been studied. The 7F0→5D0 spectra of EuIII and the values of the luminescence decay constant confirmed that trivalent lanthanides from 1 : 1, 1 : 2 and 1 : 3 inner-sphere comp…
Two series of nickel catalysts supported on sepiolite have been prepared by impregnation and precipitation procedures, and the resultant materials characterised in their reduced states. FTIR of adsorbed CO and X-ray photoelectron spectroscopy (XPS) were used to study the surfaces of the materials and the degree of red…
We report the structural and magnetic characterization of the crystalline product obtained from a solution containing Δ-(PW9O34)9- and Cu2+ ions (molar ratio 1/2) after standing a long period of time at room temperature. Three complementary techniques were used: X-ray diffraction, magnetic susceptibility measurements,…
The large shear component of the tetragonal‐to‐monoclinic transformation in zirconia causes a stress‐induced preferred orientation of the tetragonal and monoclinic variants. The resultant texture, which is dependent on the loading condition, has been analyzed in terms of stress assistance to transformation and experim…
Abstract X‐ray photoelectron spectroscopy (XPS), time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) and infrared spectroscopy (IR) have been used to study the interaction of two corrosion inhibitor blends of unknown composition with an iron surface. The analysis has precisely identified quaternary ammonium and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLaser manipulation and assembling of polymer latex particles in solutionHiroaki Misawa, Keiji Sasaki, Masanori Koshioka, Noboru Kitamura, and Hiroshi MasuharaCite this: Macromolecules 1993, 26, 2, 282–286Publication Date (Print):January 1, 1993Publication History Published o…
Phase states are defined as eigenkets of the "exponential of the phase" operator E − . It is shown that they are SU(1, 1) Perelomov coherent states corresponding to the k = ½ representation. The properties of these states are discussed and used for the calculation of the phase distribution of coherent, squeezed and ph…
Broadband dielectric spectroscopy in the frequency range from 10 −5 Hz to 10 6 Hz is employed to study the relation between α-relaxation and normal mode process for oligomeric polyisoprene and polypropylene glycol samples of different molecular weight. It is shown that relaxation time of the α-relaxation has a much st…
Nearly ten years have passed since the LF-RH-CC process was adopted in the production of bearing steels. This process has become a common system for steelmakers, regardless of using EFs or BOFs as melting furnaces. The current cleanliness level of bearing steels shows a remarkable improvement when compared to that of…
The reaction of (Et4N)2MnCl4 with MeC(CH2OH)3 in acetonitrile in the presence of atmospheric oxygen yields the oxoalkoxomanganese cluster (Et4N)2[Mn10O2Cl8{(OCH2)3CMe}6]·4MeOH·2H2O, a MnII,III mixed valence species exhibiting the decametallate core geometry, {M10O2L26}.