Materials Literature
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Abstract Thin coatings of various polyparaxylylenes were transformed into electrets by corona charging them and then overcoating with more polyparaxylylene to protect the charge layer. For such electrets, the extrapolated ten‐year use temperature depended on the thermo‐oxidative stability of the polyparaxylylene layer…
Abstract The effects of NaOAc removal of carbonates, H 2 O 2 removal of organic materials, and sodium citrate-bicarbonate-dithionite (SCBD) removal of iron oxides upon the X-ray powder diffraction (XRD) characteristics of clay minerals present within weathered volcanic ash deposits were examined. All pretreatments of…
The T, E-diagram of lead hafnate-PbHfO3 in the range of -180°C -+180°C has been established for the first time. It has been shown that besides the two previously known antiferroelectric phases in lead hafnate in a high electric field there are three more ferroelectric phases. which probably are isomorphous to the thre…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text G. Hass, J. B. Heaney, W. R. Hunter, and D. W. Angel, "Effect of UV irradiation on evaporated ZnS films," Appl. Opt. 19, 2480-2481 (1980) Export Citati…
Abstract Blends of polystyrene and poly(2,6‐dimethyl‐1,4‐phenylene oxide) that cover the entire compositional range have been subjected to the action of singlet oxygen from microwave discharge, dye‐sensitized reaction, and photochemical oxidation. With the applied analytical technique, which consisted of infrared (IR)…
Successive phase transitions in the mixed crystal with perovskite structure (1-x)ABO3+xA′B′O3 are discussed on a phenomenological basis. After a short review on the experimental facts, a simple scheme is proposed to predict the phase diagrams of mixed crystals when the model parameters of constituent substances are kn…
Abstract of the system Ca-Cu-P resulted in the discovery of CaCu 4 P 2 . The compound crystallizes in a trigonal-rhombohedral structure (hexagonal axes: a = 403.6(1) pm, c = 2227.2(2) pm; space group R3̄m) which contains structural elements of the compound CU 3 P.
Statistical Green's function theory has been successfully applied to study the ferroelectric phase transitions in the Rochelle Salt and its deuterated form with two sub-lattice pseudo-spin model containing spin-phonon interaction terms. The Blinc-de Gennes model parameters have been calculated for both of the salts. A…
Abstract A molecular LCAO Hartree‐Fock procedure was used to calculate total energies of axially stretched normal paraffins containing up to nine carbon atoms. The results are used to model the mechanical properties of polyethylene.
Abstract A purified, well characterized sample of polybenzimidazole (PBI) has been studied by fluorescence spectroscopy in order to obtain information concerning molecular aggregation in solution. Fluorescence and excitation spectra of PBI and a model compound have been measured in N , N ‐dimethylacetamide (DMA) and i…
Abstract Hydrothermal alteration products of serpentinite near Takovo, Yugoslavia, were studied by X-ray powder diffraction and chemical analysis. A zone of mainly blue clays adjacent to the hydrothermal vein contains intimately associated chromium kaolinite and tosudite at higher hypsometric levels and chromium hallo…
The ordered phase concerning the Ag distribution of a superionic conductor Ag 3 SBr was discovered below 128 K. The transition heat and the entropy change were measured to be 0.23 kcal/mol and 1.77 cal/mol·deg respectively. The transition is of the first order but is close to the second order one. The crystal structur…
For pressurized water reactor fuel, to correlate clad failure characterization and localization methods with primary cooling water gamma measurements, it was necessary to define the set of equations describing fission product (FP) generation and transport. Such a technique has been developed by the French Commissariat…
From their photoelectrolysis spectra we have determined the lowest band gaps of Cd2SnO4, CdIn2O4, and Cd2GeO4 to be 2.12 (indirect), 2.23 (forbidden), and 3.15 eV (indirect), respectively; their flat-band potentials are +0.18, +0.25, and −0.82 V (SCE), respectively. This combination of band gaps and flat-band potentia…
Abstract The hitherto unknown title compounds were prepared by a disproportionation reaction starting from elementary rubidium and indium monosulfide. Rb 4 ln 2 S 5 crystallizes in the triclinic system (P1̄) with the lattice constants a = 931.7(2); b = 1097.6(3);c = 761.2(2)pm; a = 111.32°(2); β = 94.70°(2); γ = 103.7…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic and cooperative Jahn-Teller distortions in copper pyridine N-oxide complexes, Cu(pyO)6X2 (X = tetrafluoroborate(1-), perchlorate(1-), and nitrate(1-): structural and EPR studies of pure and zinc-doped systemsJ. S. Wood, C. P. Keijzers, E. De Boer, and A. ButtafavaCit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of monodentate (tertiary phosphine)nickel(II) complexes NiX2(PR3)2, NiX2(PMe3)3, and (NiX(PMe3)4)(BF4) with carbon monoxide. Crystal and molecular structure of NiI2(CO)(PMe3)2Christine Saint-Joly, Alain Mari, Alain Gleizes, Michele Dartiguenave, Yves Dartiguenave, a…
Abstract The luminescence properties of Bi 3+ ‐activated Cs 2 NaYCl 6 crystals are presented. The Bi 3+ ion (6s 2 ) occupies an Y 3+ site which has cubic symmetry. Excitation in the A absorption band yields 3 T 1u emission. Excitation in the C absorption band, however, yields 3 T 1u and 3 A 1u emission, because both l…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSuperexchange in copper(II) dimers. 1. Synthesis, characterization, and magnetic behavior of the novel di-.mu.-bromo-bis[bromo(dimethylglyoxime)copper(II)], [CuBr2(dmgH)]2Michel Megnamisi-Belombe and Mark A. NovotnyCite this: Inorg. Chem. 1980, 19, 8, 2470–2473Publication Da…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal lattice control of unimolecular photorearrangementsJohn R. SchefferCite this: Acc. Chem. Res. 1980, 13, 8, 283–290Publication Date (Print):August 1, 1980Publication History Published online1 May 2002Published inissue 1 August 1980https://pubs.acs.org/doi/10.1021/ar50…