Materials Literature
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Charge-transfer processes in iron(III) hexacyanoferrate(II), i.e. Prussian Blue (PB), have been studied by conductimetry, dielectric relaxometry (DR) and spectrophotometry. In dry PB the predominant process is sitewise electron transfer, from agreement in inferred electron-transfer frequencies, v. When wet or admixed…
Includes a full mathematical treatment of the interaction of an electromagnetic wave with a gyromagnetic ferrite material.
Abstract The crystal structure of the monoclinic form of (BEDT-TTF)(TCNQ) is determined by X-ray analysis. The donor (BEDT-TTF) and the acceptor (TCNQ) molecules are planar and form alternating stacks.
The role of natural convection daring melting of pure tin from a specially designed heater that formed a vertical wall of a rectangular cavity has been studied experimentally. Temperature and solid-liquid interface position were measured under carefully controlled conditions, and the evolution of the melting front and…
Abstract The thermal degradation of cellulose, cellulose phosphates, and cellulose thiophosphates was studied by differential thermal analysis, dynamic thermogravimetry, and derivative thermogravimetry from ambient temperature up to 750°C. Various thermodynamic parameters for different stages of thermal degradation of…
The adsorption of zinc n-, iso-, and s-dibutyldithiophosphates from n-hexadecane on iron and iron oxide powders was investigated in static conditions. The effects of ZDTP concentration, time, and temperature were examined. ZDTP adsorption isotherms on both powders are very similar and are S-type. The adsorption kineti…
(1987). Hygroscopicity and Moisture Adsorption Kinetics of Pharmaceutical Solids: A Review. Drug Development and Industrial Pharmacy: Vol. 13, No. 4-5, pp. 653-693.
Conductivities and viscosities of solutions of Li, Na and K thiocyanates in low-molecular-weight liquid copolymers of ethylene oxide and propylene oxide have been measured. The curves of molar conductance vs. c½ show well defined maxima and minima. The conductivity is independent of copolymer molecular weight but is e…
Abstract Thin solid films of PMMA doped with donor–acceptor norbornadienes were prepared, and their photochromic properties were examined. The photochromic solid films have absorption at a visible region, and their photochemical decolorization due to valence isomerization proceeded in high quantum yields. They show re…
A summary of the effects of hydrostatic pressure on the properties of KDP and related crystals is presented with some emphasis on recent results. Topics discussed include the decrease and ultimate vanishing of Tc with pressure, the underdamped soft mode, the strong deuteration dependence of the pressure effects, the p…
Reaction of Fe(ClO4)2·6H2O with N,N′,N′-trimethyl-1,4,7-triazacyclononane (L) in methanol and addition of solid NaSCN, NaOCN, or NaN3 gave yellow compounds of the type [{FeLX2}2](X = NCS, NCO, or N3). [{FeL(NCS)2}2] is a binuclear, neutral complex in the solid state containing two bridging and two terminal thiocyanato…
Six liquid crystalline prophyrins are described which exhibit discotic mesophases over a broad temperature range before melting to stable, low viscosity, isotropic liquids suitable for capillary filling into photovoltaic cells.
High pressure phase equilibrium constraints on the origin of
Boundary value problems are difficult to treat numerically when they are defined in domains with nonsmooth boundaries. In this situation standard techniques lose accuracy near the resulting singularities, and global pollution takes place. The reason for the appearance of this effect is the lower regularity of the solu…
Presents topics at a level that is easy to understand by all. Emphasizes major concepts with numerous illustrations. Discusses the high standards of performance and reliability that composites materials offer. Makes mold and tooling parameters easy to understand. Provides valuable sources of information, specification…
Description STP 955 resulted from a major international forum for the exchange and discussion of both the fundamental and technological aspects of behavior change in materials exposed to radiation environments. 66 papers comprise this book whose contents have been categorized into seven distinct technical areas: radia…
We use the linear muffin-tin orbital method and the local density approximation to calculate the cohesive energies, equilibrium lattice constants and bulk moduli of ThO2, UO2 and PuO2. These calculations provide a framework within which to discuss the bonding in this system. The band structure of UO2 is examined in pa…
Abstract Mössbauer spectra of three nontronite samples (Garfield H33a and SWa‐1 from Washington State, U.S.A., and a sample from Hundsangen, Germany), taken between room temperature and 4.2 K in the velocity range ± 10.5 mm/s, showed between 2.9 and 13% of the total iron to be bound in goethite and not in the nontroni…
An ultra high resolution scanning electron microscope, which is composed of a cold cathode field emission gun and an in-lens system for specimens, has been developed. Probe size is estimated 0.8nm at 30kV by calculation and confirmed experimentally using high atomic number samples such as fine Pt particles sputter-coa…
This paper presents an overview of factors affecting irradiation growth of zirconium alloys. Recent data obtained from irradiation programs in EBR-II, ATR, and NRU reactors are used to illustrate the effects of various microstructural and experimental factors on the growth of Zircaloy, zirconium, and zirconium-niobium…