Materials Literature
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Properties of the \ensuremath{\alpha} and \ensuremath{\beta} phases of solid ${\mathrm{O}}_{2}$ are calculated with a deformable-cell Monte Carlo method and the character of the associated phase transition is delineated. We find that the monoclinic \ensuremath{\alpha} phase is stable at temperatures T\ensuremath{\less…
Abstract Synthetic Eu-anorthite of the alkali feldspar structure type has been refined to R w = 4.7% using 3-D counter diffractometer data and full-matrix least-squares methods. The chemical composition of the feldspar is Eu 0.92 Al 1.76 Si 2.24 O 8 , based on both occupancy refinement of the Eu atom site and estimati…
The photoluminescence characteristics of undoped and TbCl3-doped zinc oxide films deposited by the spray pyrolysis technique are reported. Undoped films present the characteristic blue-green emission peak at ∼508 nm observed in single-crystal and powder ZnO. The TbCl3-doped films present a luminescence peak at ∼540 nm…
The temperature dependence of Raman scattering near the phase transition points between antiferroelectric orthorhombic(Aa), ferroelectric rhombohedral (FR) and paraelectric cubic (PC) phases was investigated in PbZrO3 crystals. The measurements were carried out with simultaneous observations of the electric permittivi…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of ozone decomposition in water. The role of terminationAlex D. NadezhdinCite this: Ind. Eng. Chem. Res. 1988, 27, 4, 548–550Publication Date (Print):April 1, 1988Publication History Published online1 May 2002Published inissue 1 April 1988https://pubs.acs.org/doi/1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical and spectroelectrochemical studies of nickel(II) porphyrins in dimethylformamideK. M. Kadish, D. Sazou, Y. M. Liu, A. Saoiabi, M. Ferhat, and R. GuilardCite this: Inorg. Chem. 1988, 27, 7, 1198–1204Publication Date (Print):April 1, 1988Publication History Pub…
Abstract Phthalocyanine (1) was dissolved to the micellar solution formed by non-ionic surfactants with ferrocenyl moiety. A 1 thin film was prepared on an indium tin oxide (ITO) electrode by the controlled-potential electrolysis of this solution. This film consisted of rod-like crystals of 500 nm in length.
Zinc oxide elements have been developed which contain praseodymium oxide rather than bismuth oxide as a principal additive component. These elements have been used to produce gapless surge arresters with rated voltage up to 360 kV. The two-phase microstructure of these elements increases the active area of grain bound…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and reactivity of .sigma.-bonded silicon metalloporphyrins. Spectroscopic characterization and electrochemistry of (P)Si(R)2, (P)Si(R)X, and (P)SiX2, where R = C6H5 or CH3 and X = OH- or ClO4-K. M. Kadish, Q. Y. Xu, J. M. Barbe, and R. GuilardCite this: Inorg. Chem…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMDI-based polyurethane ionomers. 1. New small-angle x-ray scattering modelDaychyuan Lee, Richard A. Register, Changzheng Yang, and Stuart L. CooperCite this: Macromolecules 1988, 21, 4, 998–1004Publication Date (Print):April 1, 1988Publication History Published online1 May 2…
In order to clarify the mechanism for increased corrosion resistance in O-phosphoric acid solutions by addition of molybdenum to 17Cr-13Ni stainless steel (SS), anodic curves polarization and electron spectroscopy for chemical analysis (ESCA) have been performed on the Mo-containing steels passivated in 40 wt% H3PO4 w…
Abstract Palladium metal powders used for hydrogen isotope pumping were studied for their bulk and surface chemistry changes during cleaning with hydrogen gas at 150°C. Cleaning is necessary to promote rapid hydriding and dehydriding and to prevent contaminant ingrowth in the process gas during use. These studies show…
In this work, the interfacial reactions of heavy‐metal fluoride glasses with water have been investigated by Fourier transform infrared spectroscopy. High dilution and stirring conditions were maintained to prevent any influence of pH drift and reprecipitation. From comparisons of the integrated absorption peak areas…
The high‐temperature electrical properties (conductivity and thermopower) of the Co 0.4 Fe 2.6 O 4 ‐Mn 0.4 Fe 2.6 O 4 join were measured in order to determine the cation intersite distribution and establish the conduction mechanism. The cobalt and manganese site occupancies show a nearly linear composition dependence.…
Abstract X‐ray photoelectron spectroscopy was used to track chemical structure changes in conducting polypyrrole films which were electrochemically grown at various current densities. The film structures were correlated to changes in the film electrical conductivities. High resolution spectra of the C 1s, N 1s and O 1…
The theory of ultrasonic propagation in single-phase polycrystals presented in previous articles [J. Acoust. Soc. Am. 72, 1021–1031 (1982); 73, 1160–1163 (1983)] is generalized to calculate the scattering coefficients and phase and group velocities of plane compressional and shear waves in multiphase polycrystals. The…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTime-resolved SAXS on crystallization of a low-density polyethylene/high density polyethylene polymer blendH. H. Song, R. S. Stein, D. Q. Wu, M. Ree, J. C. Phillips, A. LeGrand, and B. ChuCite this: Macromolecules 1988, 21, 4, 1180–1182Publication Date (Print):April 1, 1988P…
The limits of families of stable solutions for the equation ε^2 Δu_ε − f(u_ε) + T(|x|) = 0 over radially symmetric domains with no-flux boundary conditions are discribed. Particular emphasis is placed on the characterization of points of discontinuity of these limits (interfaces) and on the description of the graph of…
Abstract This paper describes the method used to produce a Si 3 N 4 standard for use as a reference material in XPS measurements of silicon nitride related compounds. The reference material was made by high dose ion implantation of N + into a (100) Si wafer and annealing the wafer at 1150°C. Rutherford back‐scattering…