Materials Literature
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Abstract The state of co‐ordination of aluminium ions in synthetic glasses in the system CaO–Al 2 O 3 –SiO 2 was studied by determining the effects of varying the alumina content (from 1 to 7 moles) on the density and refractive index of glasses of composition 10 CaO, 8 SiO 2 , n ‐Al 2 O 3 (CaO/SiO 2 ratio 1.17:1). Th…
Abstract Measurements of compressive stress relaxation for molded polytetrafluoroethylene were carried out at different temperatures over the range 60–150°C., at 5°C. increments under a small strain (less than 0.3%). By the application of the so‐called Ferry's reduction method, three master curves were obtained with g…
Masaki Ohta, Masatoshi Sugiyama; Meso-ionic Compounds of the 1,3-Dithiole Ring System, Bulletin of the Chemical Society of Japan, Volume 38, Issue 4, 1 Apr
Time‐temperature characteristics were established for the formation of a silica‐rich glassy microphase in a silicate glass. Plots of temperature versus nucleation time produced curves similar to those determined by Hillig for a glass‐crystal transformation. These experiments showed that a nucleation step was required…
Electronically conducting polymers have been prepared by treating hexa- chlorobenzene with sodium at 300°, using sodium chloride as a diluent. The products, presumably polybenzenes, have resistivities of 0.2-25 ohm cm depending on the amount of sodium used; less crosslinked polymers similarly prepared from 1,2,4-tri-c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic Dissociation of Nitrogen DioxideL. L. Wikstrom and Ken NobeCite this: Ind. Eng. Chem. Process Des. Dev. 1965, 4, 2, 191–195Publication Date (Print):April 1, 1965Publication History Published online1 May 2002Published inissue 1 April 1965https://pubs.acs.org/doi/10.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalyzed Nitric Oxide Reduction with Carbon MonoxideR. A. Baker and R. C. DoerrCite this: Ind. Eng. Chem. Process Des. Dev. 1965, 4, 2, 188–191Publication Date (Print):April 1, 1965Publication History Published online1 May 2002Published inissue 1 April 1965https://pubs.acs.…
Single crystals of graphite have been irradiated with neutrons to doses of up to 7·6 × 1019 n.v.t. (Ni) at temperatures up to 900°c and examined in the electron microscope. The damage is resolved on irradiation at temperatures of ∼250°c, and consists essentially of interstitial dislocation loops. Only a few per cent o…
The character of a planar tensile stress (observed) in evaporated gold films has been investigated by means of bending method and X-ray diffraction. It has been found that stress increases with increasing film thickness in films thinner than 1000 Å and approaches to a certain values of the order of 10 9 dyn/cm 2 in th…
Abstract Acetal copolymers prepared from trioxane and ethylene oxide consist of polyoxymethylene segments with oxyethylene units distributed in the chain. These oxyethylene units profoundly affect the thermal and chemical behavior of the polymer. The presence of the oxyethylene units renders the copolymer amenable to…
The structure of LizSO4. H20 has been refined by the method of least squares with three-dimensional X-ray diffraction data measured by counter techniques from an approximately spherical crystal. Unitcell dimensions are a=5.454, b=4857, c=8.173 /~, and fl=107 22, and the space group is P21. Although a final R of 38 % w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolarized Spectra of Tetracyano Nickelate CrystalsC. J. Ballhausen, N. Bjerrum, R. Dingle, Klaas Eriks, and C. R. HareCite this: Inorg. Chem. 1965, 4, 4, 514–518Publication Date (Print):April 1, 1965Publication History Published online1 May 2002Published inissue 1 April 1965…
"Effects of Radiation on Materials and Components." Nuclear Science and Engineering, 21(4), pp. 588–589
Abstract The polymerization of styrene on neutral mineral surfaces has been studied. It has been shown that the polymerization has characteristics expected for both a radical and cationic reaction, and a mechanism involving a radical‐carbonium ion is proposed to explain this evidence. A range of mineral catalysts have…
When Pt-, Cu-, and Zn-phthalocyanines are vacuum-evaporated onto cleavage faces of muscovite, single-directional orientation occurs at lower substrate temperature. At higher temperature ranges, Zn-phthalocyanine has a double-directional orientation while Pt- and Cu-phthalocyanines show triple-directional ones. High-re…
The word "one-shot" in flexible urethane foam technology was the harbinger of lower cost products with reproducible properties. The development of L-520 organosilicone stabilizers along with tin catalysts made one- shot flexible foam a reality. The basic prin ciples learned in flexible foam have been ex tended to a on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Heat of Hydration of Cobalt Sulfate Hexahydrate to Heptahydrate. Their Solubilities and Heats of Solution1G. E. Brodale and W. F. GiauqueCite this: J. Phys. Chem. 1965, 69, 4, 1268–1272Publication Date (Print):April 1, 1965Publication History Published online1 May 2002Pu…
A description is given of the design, construction and use of an attachment for an X-ray diffractometer which enables lattice parameters to be determined to 1 part in 20 000 at temperatures between room temperature and 1000°C. Special attention is given to the problems of temperature measurement and uniformity. The in…
The semiconductor to metal transition in VO 2 is discussed in connection with the crystal distortion on the basis of a simplified one-dimensional model. It is shown that a localized electron state forming ion pairs will be stabilized at low temperatures when the transfer energy makes a sudden increase for a small cont…
Abstract A study of the elastic properties of collagen tendons while in the crystalline state while undergoing shrinkage, and while in the amorphous state was carried out. An additional analysis of x‐ray diffraction patterns and birefringence was also performed. Our main observations are the following. The lattice spa…