Materials Literature
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The rates of the phase relaxations due to the Raman scattering of phonons and the interaction of the optical center with flipping two-level systems (TLS) have been calculated for the $^{5}$${\mathit{D}}_{0}$${\mathrm{\ensuremath{-}}}^{7}$${\mathit{F}}_{0}$ line of the ${\mathrm{Eu}}^{3+}$ and ${\mathrm{Sm}}^{2+}$ ions…
High-q-resolution diffraction experiments performed with 100 keV synchrotron radiation on the identical ${\mathrm{SrTiO}}_{3}$ crystal used in neutron and x-ray-scattering experiments before, unambiguously show that the bulk critical scattering above ${\mathit{T}}_{\mathit{c}}$=99.5 K does not exhibit a sharp componen…
Abstract The Cr(III) porphyrin complexes [Cr(tpp)(Cl)(H2O)] (1) and [(Cr(tpp)(Cl)(py)] (2) (tpp represents the dianion of 5,10,15,20-tetraphenylporphine) crystallized from a chloroform–toluene mixture in the tetragonal space group I4, Z = 2, a = 13.559(5), b = 13.559(5), c = 9.770(3) Å, V = 1796(3) Å3, and from a dich…
Some experimental evidences of the critical slowing down of low- and infralow-frequency (LF, ILF) relaxation of electric polarization caused by the motion of domain walls in polar phase and of interfaces in phase transition vicinities are under consideration. The critical slowing-down that appears in decreasing of rel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConfigurational Isomerism in Bis(N-alkylsalicylaldiminato)nickel(II) Complexes: The Equilibrium Planar .dblharw. Tetrahedral and Its Effect on the Kinetics and Mechanism of Ligand SubstitutionRainer Knoch, Horst Elias, and Helmut PaulusCite this: Inorg. Chem. 1995, 34, 16, 4…
A new aspect of the special corrosion behavior of duplex stainless steels (DSS) in acid solutions was investigated. Combined examination of the current oscillations observed in the potential range of the active-to-passive transition, together with metallographic examination of the surface morphology of the exposed mat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-Ray Diffraction Study of the Correlation between Electrostatic Potential and K-Absorption Edge Energy in a Bis(.mu.-oxo) Mn(III)-Mn(IV) DimerAnette Frost Jensen, Zhengwei Su, Niels K. Hansen, and Finn Krebs LarsenCite this: Inorg. Chem. 1995, 34, 16, 4244–4252Publication D…
Abstract Layered double hydroxides (LDH's) interlayered with silicate anions were prepared by reaction of tetraethylorthosilicate (TEOS) with synthetic meixnerite-like precursors of the type [Mg 1−x Al x (OH) 2 ][OH − ] x ·zH 2 O, where (1 − x)/x ≈ 2, 3, or 4. TEOS hydrolysis at ambient temperature occurred readily in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Structure, and Characterization of N-Ligated W6S8L6 Cluster ComplexesGrant M. Ehrlich, Christopher J. Warren, Deborah A. Vennos, Douglas M. Ho, Robert C. Haushalter, and Francis J. DiSalvoCite this: Inorg. Chem. 1995, 34, 17, 4454–4459Publication Date (Print):Augu…
The enthalpy of formation of lanthanum zirconate, La 2 Zr 2 O 7 , which is shown to have a distorted pyrochlore structure, was determined. High‐temperature solution calorimetry in molten lead borate was used to determine the heat of formation from the constituent oxides as −135.8 ± 6.4 kJ/mol at 974 K. Using additiona…
Abstract The morphology of melt‐crystallized poly(ethylene succinate) (PES) was investigated by optical microscopy and scanning electron microscopy, and the melting behaviour of PES was studied by differential scanning calorimetry (DSC). At low crystallization temperature imperfect crystals were formed which could mel…
Abstract In order to explore the effects of chemical composition on the rheological behavior o filled polymeric systems, we prepared polystyrene (9PS) and poly(methyl methacrylate) (PMMA) particles crosslinked with either ethylene glycol dimethacrylate (EGDMA) or divinyl benzene (DVB), and mixed these particles in a P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe AlO + O2 Reaction System over a Wide Temperature RangeDavid P. Belyung and Arthur FontijnCite this: J. Phys. Chem. 1995, 99, 32, 12225–12230Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August 1995https://pubs.ac…
We have observed the origin of defects in SiO2 thermally grown on Czochralski silicon substrates. Samples were prepared by copper decoration to locate oxide defects, focused ion beam etching to mark them, and subsequent silicon-substrate thinning for transmission electron microscope observation. Polyhedron structures…
Abstract In general, the N 2 -BET surface areas of sepiolite samples range from 95 to 400 m 2 / g depending on deposits. The surface areas of five sepiolites, all varying in crystallite size, were measured on heating, and were compared with a model calculation. A sharp decrease in the surface area, due to crystal fold…
Measurements of the residual stresses in Al 2 O 3 /Ce‐TZP (12 mol% CeO 2 ) sintered composites, containing 10, 20, and 40 vol% zirconia, obtained by neutron diffraction and by piezospectroscopy using optical fluorescence and Raman are compared. The techniques give essentially the same values for the spatial average of…
Unprinted, unsized, and sized security papers (SP) were treated under SiCl4−, O2−, and CF4-cold plasma conditions. The plasma treatments were carried out in a stainless steel, parallel plate RF (30 kHz) reactor. The influence of plasma parameters, such as RF power, pressure, and treatment time, on the surface properti…
One of the possible uses for a conductive paste is as an adhesive in interconnect technology that could replace solder. The interconnections are expected to perform under a variety of environmental conditions, and with an applied voltage. Thus knowledge of their corrosion and dissolution resistance is of utmost import…
Abstract For the first time perthioborates with trigonal planar coordination of boron were prepared. Na 2 B 2 S 5 (Pnma, a = 12.545(2) Å, b = 7.441(1) Å, c = 8.271(1) Å, Z = 4) and Li 2 B 2 S 5 (Cmcm, a = 15.864(1) Å, b = 6.433(1) Å, c = 6.862(1) Å, Z = 4) were obtained by reaction of the metal sulfides with stoichiom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction of Poly(.alpha.,.beta.-aspartate) with Octadecylamine Monolayers: Adsorption Behavior and Effects on CaCO3 CrystallizationJon M. Didymus, Stephen Mann, William J. Benton, and Ian R. CollinsCite this: Langmuir 1995, 11, 8, 3130–3136Publication Date (Print):August…