Materials Literature
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It is shown that a‐c powder EL deterioration is closely related to sulfur vacancy in the phosphor and the phosphor crystal quality, by measurement of ESR spectrum and x‐ray diffraction pattern. The EL phosphor life is improved with a decrease in the sulfur vacancy density in the phosphor. It is further improved with a…
Irradiated UO2 fuel elements with and without deliberately induced 0.8-mm-diam defects were heated in air at 220, 230, and 250°C for times up to 685 h. Pretest burnup was typically 190 MW·h/kg U (7600 MW·d/TeU) at a maximum linear power of 45 kW/m; cooling times were 1 to 3 yr. In fuel elements with six defects, diame…
Useful applications of charging phenomena occuring during scanning electron microscopy (SEM) of conductor-insulator composites have been investigated. Unlike the charging of insulating particles in conventional SEM techniques, the local field effect in a conductive composite enhances the relative secondary electron em…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal growth in aqueous solution at elevated temperatures. Barium sulfate growth kineticsG. L. Gardner and G. H. NancollasCite this: J. Phys. Chem. 1983, 87, 23, 4699–4703Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Published iniss…
Magnetostriction and magnetic core loss at high frequency up to 100 kHz were investigated together with crystallization temperature, saturation magnetization, and magnetic permeability for amorphous (Fe1−xNbx)zSi88−zB12 alloys. Crystallization temperature significantly rises with Nb addition, particularly in the high…
With a view to examining the failure-bearing capability of Zircaloy-4 cladding under postulated Loss-of-Coolant Accident condition in LWRs, integral tests of rod-burst, oxidation and thermal-shock were performed using simulated fuel containing A1203 pellets sheathed in Zircaloy-4 specimen cladding, filled with He gas,…
Epimerase activity, which converts isopenicillin N to penicillin N, has been partially purified from cell-free extracts of Streptomyces clavuligerus. No stimulating cofactors of this activity were found, and neither EDTA nor anaerobic incubation caused significant inhibition of activity. Although pyridoxal phosphate d…
Abstract Fourier‐transform infrared spectroscopy has been used for the detection of conformational changes induced by plasticization in atactic poly(vinyl chloride) (PVC). The amount of short trans syndiotactic sequences decrease upon plasticization. This change depends on the amount and kind of plasticizer. Differenc…
PTCR characteristics in porous semiconducting barium titanate ceramics with Curie points from 60° to 360°C were investigated. The magnitude of the PTCR effect in these cerumics decreases self‐onsistently with increasing Curie point within this temperature range. A PTCR efSect of more than 4 orders of magnitude was ahs…
Abstract Physical Blends of ultrahigh‐molecular‐weight linear polyethylene (UHMW LPE) and normal‐molecular‐weight linear polyethylene (NMW LPE) have been evaluated in terms of melt flow rate, tensile stress‐strain behavior, heat of fusion, melting temperature, and crystallinity. The behavior of the blends is intermedi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRing size effects on the structure of macrocyclic ligand complexes: copper(II) complexes with 12-16-membered cyclic tetrathia ethersVirginia B. Pett, Leonard L. Diaddario Jr., Edward R. Dockal, Peter W. Corfield, Christopher Ceccarelli, Milton D. Glick, L. A. Ochrymowycz, an…
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Tensile properties of native cotton cellulose having various water contents from 0% to 50% in weight were measured. X-ray diffraction patterns of samples containing sorbed water were also measured. The dimensional change of the cross section of a single fiber was observed under a microscope. The amount of bound water…
Article The structural properties of synthetic Sr-åkermanite, Sr2MgSi2O7 was published on November 1, 1983 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 163, issue 1-4).
This paper surveys the temperature, microstructural and environmental variations of the fracture properties of ferroelectric ceramics. Earlier work shows that fracture toughness decreases on heating through the Curie temperature. There is also anomalous behavior in the strength at small crack sizes, indicative of a gr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA carbon-bonded tris(2,2'-bipyridine)iridium(III) complex: (2,2'-bipyridinyl-C3,N')bis(2,2'-bipyridine-N,N')iridium(III) perchlorate-water (3/1)G. Nord, A. C. Hazell, R. G. Hazell, and O. FarverCite this: Inorg. Chem. 1983, 22, 23, 3429–3434Publication Date (Print):November…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface-enhanced Raman scattering by molecules adsorbed on aqueous copper colloidsJ. A. Creighton, M. S. Alvarez, D. A. Weitz, S. Garoff, and M. W. KimCite this: J. Phys. Chem. 1983, 87, 24, 4793–4799Publication Date (Print):November 1, 1983Publication History Published onli…
Some of device applications of the Pb(Mg1/3Nb2/3)O3-based electrostrictors are reviewed, including displacement transducers for controlling optical pathlength (sensitive AC interferometer, bistable optical device and deformable mirror), and mechanical position actuators (micro-angle adjusting device and servovalve fla…
Abstract Although most triglyceride oils contain only double bond functionality, a few oils such as castor oil, vernonia oil, lesquerella oil, etc., contain other functional groups. These functional groups include hydroxy and epoxy groups, permitting the easy formation of polyesters and/or polyurethanes. In addition t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox chemistry of metalloporphyrins in aqueous solutionA. Harriman, M. C. Richoux, and P. NetaCite this: J. Phys. Chem. 1983, 87, 24, 4957–4965Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Published inissue 1 November 1983https://doi…