Materials Science and Engineering
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Alumina: Processing, Properties, and Applications
1 Introduction.- 1.1 Scope of the Book.- 1.2 General Remarks on the Use and the Behavior of Ceramic Materials.- 1.3 The History of Alumina.- 1.4 Preceding Summarizing Literature on Alumina.- 2 Physical Properties.- 2.1 Structure.- 2.2 Thermal Properties.- 2.3 Diffusion.- 2.3.1 General Remarks on Diffusion Phenomena in…
Electrochromic Coatings For "Smart Windows"
We introduce electrochromic coatings for use on "smart windows" with dynamic control of radiant energy. Applications, operating principles, materials options, and device configuration are briefly reviewed. We then focus on electrochromic WO3 and investigate crystalline films by computations aimed at assessin…
Structural and antiferroelectric phase transitions in betaine phosphate, (CH3)3NCH2COO · H3P04
Article Structural and antiferroelectric phase transitions in betaine phosphate, (CH3)3NCH2COO · H3P04 was published on November 1, 1984 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 168, issue 1-4).
Domain modifications due to compression perpendicular to the rolling direction of coated HI-B sheets
Domain modifications due to compressive stress applied perpendicular to the rolling direction (RD) of coated HI-B sheets are discussed. Both single and stacked sheets were investigated. Compressive stress normal to the sheet surface, as well as compressive stress within the sheet plane, was found to cause refinement o…
Crystal structure, polarity and morphology of 4-0-β-D-galactopyranosyl-ɑ-D-glucopyranose monohydrate (ɑ-lactose monohydrate): a redetermination
Article Crystal structure, polarity and morphology of 4-0-β-D-galactopyranosyl-ɑ-D-glucopyranose monohydrate (ɑ-lactose monohydrate): a redetermination was published on November 1, 1984 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 168, issue 1-4).
Polarization Effects in Polyimides
Abstract not Available.
Stability and Chemical Form of Iodine Sorbed on Silver-Exchanged Zeolite X
Neutron activation technique was used to measure the amounts of I, Ag and Na elements in zeolite samples. The samples were nonradioactive before the activation analysis; this facilitated various operations to investigate the chemical form of the sorbed iodine. It was found that the Ag+ ions positioned in three types o…
A novel organic photochromic
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA novel organic photochromicS. D. Cox, C. W. Dirk, F. Moraes, D. E. Wellman, Fred Wudl, M. Soltis, and C. StrouseCite this: J. Am. Chem. Soc. 1984, 106, 23, 7131–7133Publication Date (Print):November 1, 1984Publication History Published online1 May 2002Published inissue 1 No…
Thermal and Age-Resistance Properties of NR Gum Vulcanizates in EV Systems
Abstract A comparative study of the cure behavior of thiocarbamyl sulfenamides both in the presence of MBTS and thiazole sulfenamides has been made at 140 and 170°C. It is observed that most of the NR vulcanizates obtained at 170°C are capable of retaining a considerable portion of torque, modulus, and tensile values…
Structural studies on molecular complexes of polyethers, 3. Urea‐polyether complexes
Abstract Complexes of urea with polyethers, \documentclass{article}\pagestyle{empty}\begin{document}$\rlap{‐‐} [\left( {{\rm CH}_2 } \right)_m {\rm O\rlap{‐‐} ]}_n$\end{document} ( m = 2–4, 6, 8–10), were prepared, and their crystal structures and decomposition temperatu…
Chemical alloying, a novel method for the preparation of homogeneous selenium-tellurium (SexTe1-x) alloys
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical alloying, a novel method for the preparation of homogeneous selenium-tellurium (SexTe1-x) alloysThomas W. Smith, Steven D. Smith, and Santokh S. BadeshaCite this: J. Am. Chem. Soc. 1984, 106, 23, 7247–7248Publication Date (Print):November 1, 1984Publication History…
Improved Surface Voltage Uniformity on Electrets Obtained by Modified Corona Charging Method
The common corona charger consisting of wire or needle, gnrd, and one side metalized sample has been modified to obtain a more uniform surface potential over the area of interest. The better uniformity is obtained by adding an aperture between grid and sample close to the surface to be charged. This aperture is connec…
Low-temperature a.c. conductivity of vanadium dioxide crystals
The dielectric constant ε′(ω) and the a.c. conductivity σ(ω) of undoped and lightly doped (0·5% Al, 0·8% Ti, 0·5% W) crystals of vanadium dioxide (VO2) are reported for the temperature range 4·2–77 K and the frequency range 0·1–100 kHz. The 0·5% W-doped sample shows a strong dispersion in ε′(ω) and a frequency-indepen…
Stress-induced magnetization changes of steel pipes--Laboratory tests, Part II
Magnetometer surveys above gas pipelines have shown stress-induced magnetic anomalies at pipe bends. This suggests a technique for noninvasive monitoring of stress in pipelines and other ferromagnetic structures. Previous laboratory measurements of the external magnetic field changes due to single bending and internal…
Synthèse de dérivés du tétrathiafulvalène à propriétés mésomorphogènes
Abstract Nous décrivons la synthèse de bis (alkyl‐4 phényl) et bis (alkoxy‐4 phényl) tétrathiafulvalènes originaux. Certains d'entre eux présentent un polymorphisme dont on a précisé les températures de transition.
Effect of Solidification Mode and Impurities on Pitting Corrosion in AISI 316 GTA Welds
Pitting resistance was evaluated in autogenous GTA welds of approximately 30 commercial and laboratory heats of AISI 316 steel sheets by the standard ferric chloride immersion test and the potentiodynamic anodic polarization test in acid chloride solution. The results indicate that the solidification mode, although it…
Effect of Oxygen Partial Pressure on Oxidation of Iron at 573 K
The oxidation of iron was investigated by Rutherford backscattering spectroscopy at 573 K under the oxygen partial pressure from 10−1 to 105 Pa for 3~24 h. In the first stage of oxidation, thickness of the oxide film reached the maximum around 1 Pa. In the second stage the oxidation obeyed the parabolic rate law. From…
Reflection and Photoconduction Spectra of the Single Crystals of Perylene-TCNQ 1:1 and 3:1 Molecular Complexes
Abstract Crystal absorption spectra of the two modifications of the perylene-TCNQ (7,7,8,8-tetracyanoquinodimethan) complex were derived from reflection spectra by the Kramers-Kronig transformation and are discussed in relation to the differences in the crystal structures. The spectral response of photoconduction does…
Spectroscopic Study of the Crystal Field Splittings in TbPO4
Abstract The optical absorption and emission spectra of Tb 3+ in TbPO 4 in its tetragonal structure above 2.3 K are studied to obtain the energies, symmetry types, and wave functions of mainly the lowest crystal field components of the ground term 7 F 6 . Crystal field parameters are evaluated and used to calculate th…