Materials Literature
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The sources and calculation of thermal stresses are considered, together with the factors involved in thermal stress resistance factors. Properties affecting thermal stress resistance of ceramics are reviewed, and testing methods are considered.
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An attempt is made by Hartman & Perdok to find relations between crystal structure and crystal morphology on an energy basis. It is concluded that the morphology of a crystal is governed by chains of strong bonds running through the structure.
Abstract not Available.
The electrical and optical properties of InSe have been investigated with single crystals of the compound. The spectral dependence of the optical absorption coefficient and of the photoconductivity was measured. The optical absorption edge was not sufficiently well defined for the band gap to be estimated unambiguousl…
Abstract A mgnetically controlled null-point modification of the rotating crucible viscometer has been devised which enables measurements of the viscosity of liquids to be made at maximum temperatures of 1850° C. The instrument has been applied to measure the viscosity of the system CaO -SiO2 over the composition rang…
Abstract The crystal structure of polyethylene terephthalate (Terylene) has been determined by the interpretation of the X-ray diffraction patterns given by drawn fibres. The unit cell, which contains one chemical unit, —CO.C6H4.CO.O.(CH2)2O—, is triclinic, with a = 4.56Å, b = 5.94 Å, c = 10.75 Å, α = 98 1/2°, β = 118…
Abstract (1) The phenomenon of stress relaxation in vulcanizates, due to thermal decomposition of the vulcanization structures, is discussed. The process follows the equation: σ t =σ 0 ⋅e −kt , where k is the kinetic constant of decomposition of the vulcanization structures, and therefore can serve as a measure of the…
Any one making a design for a woven fabric naturally wants to be sure in advance that the loom will weave the design. Thus, a practical designer, when first considering the use of Love's weavability graphs, is likely to ask himself: "The geometry may be all right, but how about loom performance? How closely can I expe…
Abstract The effect of exposing long chain polymers to high energy radiation is either to produce crosslinking or chain degradation. Changes in some of the properties are outlined. The formation of gel in many polymers offers a possibility of obtaining information as to the initial molecular weight distribution. Resul…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTThe Alkali Orthophosphates. Phase Equilibria in Aqueous Solution.Bernard Wendrow and Kenneth A. KobeCite this: Chem. Rev. 1954, 54, 6, 891–924Publication Date (Print):December 1, 1954Publication History Published online1 May 2002Published inissue 1 December 1954https://pubs.acs.…
The usual electrical methods of determining thermal conductivities either cannot be used at high temperatures or their use is restricted to substances like carbon or graphite which satisfy certain special requirements. It is shown that the observed temperature distribution along a metal filament electrically heated in…
ABSTRACT Experiments were undertaken to determine the site of water uptake, and the conditions in which it occurs, in Ligia oceanica, Oniscus asellus, Porcellio scaber and Armadillidium vulgare. Besides absorbing water with moist food, all four species were capable of active imbibition of water through both mouth and…
Grain boundary penetrations of radioactive silver into copper bicrystals having a common cubic direction have been measured using an autoradiographic technique. Diffusion occurred along directions forming an angle φ=0°, 45°, and 90° with the common cubic direction. For very low angles of disorientation Θ, no preferent…
\Vhen heated in a vacuum at temperatures of about 200 0 to 500 0 C, p oly mer chains break p into volatile fragments of various sizes, dependin g on t l1 e natu re of l ll e polymer. Som e ,Joly mers, like pol y -alpha-meth ylstyrene, y ield the monomer exclusively. Other polymers, like polymethylene, yield a whole sp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTYttrium Chromium Oxide, a New Compound of the Perowskite TypeJohn T. Looby and Lewis KatzCite this: J. Am. Chem. Soc. 1954, 76, 23, 6029–6030Publication Date (Print):December 1, 1954Publication History Published online1 May 2002Published inissue 1 December 1954https://pubs.a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Preparation of Lanthanum Titanium Oxide, LaTiO31Michael Kestigian and Roland WardCite this: J. Am. Chem. Soc. 1954, 76, 23, 6027Publication Date (Print):December 1, 1954Publication History Published online1 May 2002Published inissue 1 December 1954https://pubs.acs.org/do…
Abstract Many supply waters that might be expected to cause pitting corrosion in copper cold‐water pipes containing carbon films do not do so because they contain a natural inhibitor. The inhibitor has not been identified, but it can be shown to be present in these waters and its concentration can be compared roughly…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Equilibria in the System CaO–Ti02R. C. DeVries, Rustum Roy, and E. F. OsbornCite this: J. Phys. Chem. 1954, 58, 12, 1069–1073Publication Date (Print):December 1, 1954Publication History Published online1 May 2002Published inissue 1 December 1954https://pubs.acs.org/doi…
The sintering and grain growth of alumina as a function of the type of impurity (oxide) added was studied. One weight per cent of the impurity was added to a commercial Be‐grained alumina or was coprecipitated with iilcl 3 to form hydroxides. Fired shrinkage, bulk density, and apparent porosity measurements were used…