Materials Literature
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Abstract The thermoelectric power of lightly doped p‐Ge is measured in the temperature range of 5 to 300 K for the investigation of phonon scattering. The application of a simple theoretical model requires some knowledge of the dominant carrier scattering processes obtained by measurements of electrical conductivity a…
Alnico5 and 7 specimens have been studied by field ion microscopy, atom probe microanalysis and high voltage electron microscopy. The composition and morphology of the phases was accurately determined. From the results, it was shown that magnetization changes occurred by Bloch wall motion.
Abstract The overall flammability hazard of Zirpro wool protective clothing, carpets and upholstery with regard to national and international standards is summarized. Protective clothing against heat and flames has to be evaluated not only for flame‐retardance by a vertical flame test but also for heat transfer from c…
Abstract This chapter covers the emerging practice of quantitative microscopy and its application in the study of the microstructure of metals. It describes the methods used to quantify structural gradients, volume fraction, grain size and distribution, and other features of interest. It provides examples showing how…
Uniformity of thermal expansion has been measured for fused quartz (Heraeus-Amersil TO8E) and borosilicate glass (Schott Duran and Ohara E6). The variation of expansion coefficient for three melts of TO8E was 5 x 10(-9)/K over a temperature range of 300 to 100 K and was found to vary linearly with position in the melt…
For the first time, electrically stimulated optical modulation in a thin-film NbO2 device is demonstrated. NbO2 thin-film deposition by reactive ion-beam sputtering, device fabrication, and device performance as a 120-Hz continuous-wave modulator are described.
Abstract The mineralogy of the clay fractions (<2 µ m) of the major soils of England and Wales is reviewed, and the data presented in terms of the 1:250 000 National Soil Map. Most soils developed in pre-Rhaetic sediments are dominated by mica with lesser amounts of chlorite and kaolin. Exceptions are soils develop…
X-ray and infrared spectroscopic analyses were used to measure crystallinity of cotton fibers swollen in liquid ammonia and an aqueous solution of caustic soda. Changes due to such swelling, which took place in the accessible regions, were determined by moisture regain and iodine and dye sorption. Results showed that…
Abstract The formula for the first derivative of the MCSCF energy with respect to a nuclear coordinate is reviewed. The efficient utilization of symmetry in programs employing symmetry‐adapted basis functions is described: Advantages that are also obtained for higher derivatives and for gradients of nonself‐consistent…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-spin manganese(III) porphyrin imidazolate and cyanide complexes. Modulation of magnetic anisotropy by axial ligationAndrew P. Hansen and Harold M. GoffCite this: Inorg. Chem. 1984, 23, 26, 4519–4525Publication Date (Print):December 1, 1984Publication History Published on…
Breakdown Phenomena During the Growth of Anodic Oxide Films on Zirconium Metal: Influence of Experimental Parameters on Electrical and Mechanical Breakdown, Di Quarto, Francesco, Piazza, Salvatore, Sunseri, Carmelo
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Arrhenius kinetic constants by differential scanning calorimetryJan C. M. Torfs, Leen. Deij, Anthonie J. Dorrepaal, and Josef C. HeijensCite this: Anal. Chem. 1984, 56, 14, 2863–2867Publication Date (Print):December 1, 1984Publication History Published onlin…
SUMMARY Magnetite grains in lateritic saprolite have altered in situ to porous hematite (martite) grains. Hematite occurs as relatively large (∼ 1 μm) platy crystals, triangular arrays of small (0.01–0.05 μm) lathlike crystals and very small (< 100 Å) platy anhedral particles. Titanium increased in altered grains a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntrinsic viscosity of poly(hexyl isocyanate) in butyl chlorideMamoru Kuwata, Hirochika Murakami, Takashi Norisuye, and Hiroshi FujitaCite this: Macromolecules 1984, 17, 12, 2731–2734Publication Date (Print):December 1, 1984Publication History Published online1 May 2002Publi…
Abstract A series of stretch‐blow molded poly(ethylene terephthalate) bottles were investigated using measurements of birefringences (in plane and out of plane) and wide angle x‐ray diffraction (WAXS) pole figures. Both bottles prepared in our laboratories and commercial bottles were investigated. Birefringences Δ n 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray crystal and molecular structures of related octahedral magnesium tetraphenylporphyrin complexesV. McKee, Ong Chin Choon, and G. A. RodleyCite this: Inorg. Chem. 1984, 23, 25, 4242–4248Publication Date (Print):December 1, 1984Publication History Published online1 May 20…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of graft co-polymerization onto polysaccharides initiated by metal ion oxidation reactions of model compounds for starch and celluloseTakahisa Doba, Cenita Rodehed, and Bengt RanbyCite this: Macromolecules 1984, 17, 12, 2512–2519Publication Date (Print):December 1,…
In many commercial processes cellulose is exposed to elevated temperatures in the 100 to 200°C range. Though this range is below the glass transition temperature (Tg) of dry cellulose, in the presence of polar media Tg is depressed, and molecular mobility is sufficient to allow structural reorganization. In the presen…
Sizes and shapes of the component phases of immiscible polymer blends are strongly influenced by the viscoelastic properties of each component. For mixtures of different poly(ethylene terephthalate)s and polyamide-6 it can be established that the morphology under shear is the result of the viscosity ratio, which deter…
A convenient method for measuring the dc Kerr effect on the stage of a polarizing microscope is described. Two novel illustrations of this technique are presented: a low-field determination of the pretransitional Kerr effect in the isotropic phase of a nematic having a negative dielectric anisotropy and measurements o…