Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUse of noble metals in automobile exhaust catalystsJ. T. KummerCite this: J. Phys. Chem. 1986, 90, 20, 4747–4752Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published inissue 1 September 1986https://pubs.acs.org/doi/10.1021/j100411a…
We study the fluctuating nonlinear hydrodynamics of compressible fluids. Development of the appropriate field-theoretical description for this problem requires treatment of nonlinearities which arise through the relationship g=\ensuremath{\rho}V, where g is the momentum density, \ensuremath{\rho} is the mass density,…
The present work pretends to give a quick answer to a professional request, which is to classificate building materials. With that purpose this work analyses some of the different existing systems of classification, creating an operating system to choose a building material attending its specific properties as a const…
The effect of an industrial process of surface treatment ("fire jet") of ornamental rock slabs upon the mineralogical and textural characteristics of an igneous rock known commercially as "Pink Porriño" (Rosa Porriño) rom Galicia (NW Spain), has been studied by optical and electron microscopy. The most important physi…
With the aid of a 400-litre capacity pilot furnace, in which 40 Kg of rice husk is submitted to controlled combustion, an ash (RHA) is obtained for use as an addition, the physicochemical properties of which form the focal point of this work. Results will also be presented for the combustion power of the husk ≃ 4000 k…
The high exigencies required for some structures owing to their responsability or their high cost have originated a new discipline that can be called Reability Engineering, which main aim is to determine the probability afforded by a machine to comply a requirement. This work contains a not fully detailed description…
The effect of fabric moisture on thermal insulation properties of twelve heat resistant fabrics made with polybenzimidazole (PBI), aromatic polyamide (aramid) and blends of PBI with aramid or with flame retardant rayon fibers is investigated in several high intensity radiant and convective heat exposures. Three fabric…
Abstract Swelling, shrinking and physical breakdown processes are reviewed with reference to well-known mudrock and overconsolidated clay formations in the UK and USA. Swelling results from two processes: the equilibration of depressed porewater pressures following stress relief, and the physico-chemical (osmotic) res…
The “grain‐boundary effect,” which leads to a greatly reduced dc ionic conductivity due to the presence of a blocking layer in the vicinity of the grain boundaries, is studied in detail for ceria ceramics doped with various trivalent dopants (particularly Y 3+ , Gd 3+ , and La 3+ ). The effects of porosity, of sinteri…
The following new or updated patterns are submitted by the JCPDS Research Associateship at the National Bureau of Standards. The patterns are a continuation of the series of standard X-ray diffraction powder patterns published previously in the NBS Circular 539, the NBS Monograph 25, and in this journal. The methods o…
Results of rapid (laser induced) and slow (heating stage induced) crystallization studies on Te1−xGex, 0≤x≤0.6, are reported. The time it takes to laser crystallize varies with x by more than four orders of magnitude. Films with stoichiometric compositions, Te and GeTe, can be crystallized using laser pulses of less t…
The oxidation kinetics of several single‐crystal and polvcrystalline silicon carbide materials and single‐crystal silicon in dry oxygen over the temperature range 1200° to 1500°C were fitted to the linear‐parabolic model of Deal and Grove. The lower oxidation rates of silicon carbide compared to silicon can be rationa…
In this paper we examine the detailed relationship between the density-wave and unit-cell descriptions of quasicrystals. We show that phonons, phasons, and dislocations correspond to translations, distortions, and rearrangements of unit cells. The associated density-wave images closely resemble experimental electron m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of lyotropic polymer liquid crystalsTheo OdijkCite this: Macromolecules 1986, 19, 9, 2313–2329Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published inissue 1 September 1986https://pubs.acs.org/doi/10.1021/ma00163a001https://…
Semiconductor crystallites of characteristic dimension\sim20-100Å can be made by precipitation in liquids and dielectrics. These crystallites have bulk-like internal lattices. The optical spectra show partially resolved discrete features that result from carrier spatial confinement in three dimensions. Spectral shifts…
The growth and collapse of transient vapour cavities near a rigid boundary in the presence of buoyancy forces and an incident stagnation-point flow are modelled via a boundary-integral method. Bubble shapes, particle pathlines and pressure contours are used to illustrate the results of the numerical solutions. Migrati…
The band structure of chromium dioxide, which is an important material because of its magnetic properties, has been calculated with the augmented spherical wave method by performing self-consistent spin-polarised calculations. The majority-spin electrons are metallic, whereas the minority-spin electrons are semiconduc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleDendritic macromolecules: synthesis of starburst dendrimersDonald A. Tomalia, H. Baker, J. Dewald, M. Hall, G. Kallos, S. Martin, J. Roeck, J. Ryder, and P. SmithCite this: Macromolecules 1986, 19, 9, 2466–2468Publication Date (Print):September 1, 1986Publication History Publish…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystalline syndiotactic polystyreneN. Ishihara, T. Seimiya, M. Kuramoto, and M. UoiCite this: Macromolecules 1986, 19, 9, 2464–2465Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published inissue 1 September 1986https://pubs.acs.org/…