Materials Literature
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Phase relations in the system Y 2 O 3 ‐Y 2 O 3 ·WO 3 were studied at >1400°C. Yttrium oxide with the rare‐earth C‐type structure transformed into a hexagonal structure at 2360° and melted at 2400°C. The eutectic between Y 2 O 3 and 3Y 2 O 3 ·WO 3 was 2334°C at ∼90 mol% Y 2 O. 3Y 2 O 3 ·WO 3 with a rhombohedral stru…
Abstract The incorporation of sulfate into anodic film formed on aluminium in an H2SO4–MgSO4 solution was investigated by infrared spectroanalysis using the compensation method. The sulfate content of the film was very small at the initial stage of anodizing, but increased with time to a nearly constant value. This re…
Polarization-related electrostrictive coefficients Qh have been determined for relaxation dielectrics 0.856Sr TiO3-0.144 Bi2/3 TiO3 and (K3/4Bi1/4) (Zn1/6Nb5/6)O3, and for a simple non-polar perovskite BaZrO3 by measuring the hydrostatic pressure dependence of the dielectric permittivity. Anomalous variation in the el…
Age-hardening mechanisms of dental Ag-Pd-Cu-Au alloys were investigated by means of electron microscopic observations. Hardening was due to the precipitation of the L10 type CuPd-ordered platelet in the grain interior and to the discontinuous precipitation at the grain boundary. The characteristics of age-hardening cu…
Abstract Information on the dissolution of phosphate rock in soils as related to soil properties is needed in order to understand the solubility behavior of the phosphate rock in soils as related to crop response. This study was conducted to determine the relationships between the dissolution rate of North Carolina ph…
Abstract A detailed mathematical model of a single catalyst pellet has been developed to describe its behavior under transient conditions encountered during the warmup period of automobile exhaust catalytic converters. In contrast to the converter models previously reported in the literature, this model is capable of…
The environmentally-controlled crack propagation rates in the sensitized 304 stainless steel/water system at 95 C have been measured under static, monotonic; and cyclic stress conditions. It has been observed that the crack propagation rates increase with stress intensity rate and that the behavior under classical “st…
Abstract Two greenhouse experiments, the first a complete factorial comprising six rates of lime, four of phosphorus (P) and three of zinc (Zn) on two kaolinitic Ultisols, and the second involving factorial combinations of lime at four levels or gypsum at two chemically equivalent levels with three levels of P on one…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEXAFS study and magnetic properties of copper(II) chloranilato and bromanilato chains: a new example of orbital reversalM. Verdaguer, A. Michalowicz, J. J. Girerd, N. A. Berding, and O. KahnCite this: Inorg. Chem. 1980, 19, 11, 3271–3279Publication Date (Print):November 1, 1…
Abstract Model networks were prepared by selective crosslinking through vinyl groups occurring as either chain ends or as side‐groups on a poly(dimethylsiloxane) backbone. Iodometric titrations were used to determine the number of unreacted groups, thereby providing detailed information on the completeness of the reac…
Abstract When a polymer specimen yields under tension by the process of cold‐drawing, heat is generated in the necking region. This beating effect has been studied in polycarbonate, polyethylene, polypropylene, and PVC with the use of a thermovision system which produces a real time thermal image of the necking specim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhosphazene High Polymers with Steroidal Side GroupsH. R. Allcock and T. J. FullerCite this: Macromolecules 1980, 13, 6, 1338–1345Publication Date (Print):November 1, 1980Publication History Published online1 May 2002Published inissue 1 November 1980https://pubs.acs.org/doi/…
The electronic conductivity of MgO was determined by measuring the dc conductivity and ionic transference number as a function of temperature (1200° to 1600°C), oxygen pressure (10 −1 to 10 −13 MPa), and trivalent solute concentration (65 to 1500 ppm) using samples doped with Al, Fe, or Sc so that only one dopant cont…
Abstract not Available.
A quantitative theoretical model which accounts for the variations of ionic conductivity of calcia‐stabilized zirconia, , with oxygen vacancy concentration, , and temperature, , has been developed based on the consideration of effective anion‐site coordination of effectively negatively charged calcium ion, Ca 2' . The…
Solid samples of a nonhydrolytically stabilized bisphenol-A polycarbonate were hydrolyzed at 125°C and 1.4 atm of steam. IR and UV techniques were used both to estimate the degree to which the unhydrolyzed polymer is capped by a chain-terminating agent and to determine the rate of hydrolysis as indicated by the format…
Recent experiments using synchrotron radiation to measure anomalous scattering terms at wavelengths very close to L-shell elemental absorption edges [Phillips, Templeton, Templeton, & Hodgson (1978). Science, 201, 25 7-259] have demonstrated that effects much larger than those expected on the basis of simple atomic sc…
Fundamental characteristics of electron penetration in solids, such as energy and angular distributions of transmitted electrons, have been theoretically calculated using a Monte Carlo approach. The essential features of the Monte Carlo approach are the inclusion of the random nature of inelastic scattering events, an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEmpirical Studies of Hydrophobicity. 1. Effect of Protein Size on the Hydrophobic Behavior of Amino AcidsH. Meirovitch, S. Rackovsky, and H. A. ScheragaCite this: Macromolecules 1980, 13, 6, 1398–1405Publication Date (Print):November 1, 1980Publication History Published onli…
Abstract The facile preparation of zinc(II) meso ‐tetraphenylporphyrin (Zn TPP) and derivatives from substituted benzaldehydes and pyrrole, combined with the calculation of ring current shifts in these molecules, provides a useful series of selective diamagnetic shift reagents. The porphyrin‐ligand equilibrium is exam…