Materials Literature
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We have previously proposed a method for depositing silicon dioxide films on Si from tetraethoxysilane (TEOS) using ultraviolet (UV) light from a low pressure mercury lamp. In the method, an organic solution which contains TEOS is spin‐coated onto a Si wafer surface to form a thin organic film which is then exposed to…
Incompresible, thin sheet flows have been of research interest for many years. Those studies were mainly concerned with the stability of the flow in a surrounding gas. Squire was the first to carry out a linear, invicid stability analysis of sheet flow in air and compare the results with experiment. Dombrowski and Fra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of Organic Chemical Partition in Soils. 3. Nonlinear Partition from Water-Miscible Cosolvent SolutionsFrank C. Spurlock and James W. BiggarCite this: Environ. Sci. Technol. 1994, 28, 6, 1003–1009Publication Date (Print):June 1, 1994Publication History Publishe…
Abstract Highly crystalline kaolinite has been studied by 27 Al satellite transition magic angle-spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. This technique provides an additional narrowing of the MAS spectral lines by a factor of more than three compared with the width of the prominent central transi…
Abstract X‐ray photoelectron spectroscopy (XPS or ESCA) is one of the most common surface analytical techniques available. It has proved over many years to be invaluable in the analysis of elemental and chemical species on surfaces. The recent developments of this technique towards spatially resolved XPS information h…
Small-angle neutron scattering (SANS) and wide-angle neutron scattering (WANS) measurements on pumice, an amorphous natural aluminosilicate used as support for metals in the preparation of catalysts, are reported. The SANS spectrum indicates the presence of a broad size distribution of pores and the absence of volume…
ADVERTISEMENT RETURN TO ISSUEPREVArticleAdditions and Corrections - Oxidation of SO2 to SO3 over Honeycomb DeNoxing CatalystsJiri Svachula, Louis Alemany, Natale Ferlazzo, Pio Forzatti, Enrico Tronconi, and Fiorenzo BreganiCite this: Ind. Eng. Chem. Res. 1994, 33, 6, 1644Publication Date (Print):June 1, 1994Publicatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRational Solvent Selection for Cooling CrystallizationsKathryn K. NassCite this: Ind. Eng. Chem. Res. 1994, 33, 6, 1580–1584Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994https://pubs.acs.org/doi/10.1021/ie0003…
This paper presents the results of investigations of amorphous substances formed as a result of thermal decomposition of inorganic crystalline solid bodies by way of their structural rearrangement in a solid phase as an order-disorder transformation.The investigations were conducted on model substances represented by…
Earlier studies have shown that the presence of excess sodium in high‐level nuclear waste can give rise to increased leachability when the waste is incorporated in Synroc‐type titanate ceramics. Freudenbergite (Na 2 Al 2 Ti 6 O 16 ) can incorporate sodium and it exhibits satisfactory leaching resistance in water and r…
Abstract Darstellung und Kristallstruktur von SnTl 4 Se 3 werden beschrieben. Die Verbindung kristallisiert in der Raumgruppe P4/ncc als niedersymmetrische Verzerrungsvariante des In 5 Bi 3 ‐Typs, der selbst eine isopuntale Unterfamilie des Cr 5 B 3 ‐Typs ist: a = 852,2(2) pm, c = 1 272,2(6) pm, c/a = 1,49, Z = 4. Es…
The early stages of oxide film passivation of corroding surfaces in aluminum etch tunnels and pits were investigated. Passivation was initiated by step reductions in applied current. A mathematical model for passivation was used to predict experimentally measured potential transients during the first millisecond after…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Stereoregularity of .gamma.-Irradiation Canal Polymerized Polyacrylonitrile by 1H 2D J-Resolved NMR SpectroscopyMasatomo Minagawa, Koichi Ute, Tatsuki Kitayama, and Koichi HatadaCite this: Macromolecules 1994, 27, 13, 3669–3671Publication Date (Print):June 1…
Temperature dependences of $^{39}\mathrm{K}$ and $^{85}\mathrm{Rb}$ nuclear-quadrupole resonance frequencies have been measured in tetragonal paraelectric phases of ${\mathrm{KH}}_{2}$${\mathrm{PO}}_{4}$, ${\mathrm{KH}}_{2}$${\mathrm{AsO}}_{4}$, ${\mathrm{RbH}}_{2}$${\mathrm{PO}}_{4}$, and ${\mathrm{RbH}}_{2}$${\mathr…
Maturity of cotton fibers refers to the extent of development of their secondary wall and is an important characteristic. To characterize and quantify cotton maturity, we have developed an imaging system based on our previous research on fiber cross- sectional shape analysis. In this paper, we focus on methods of char…
Abstract The electroinitiated polymerization of N ‐vinyl‐2‐pyrrolidone has been investigated. After electrolysis at controlled potential, a thin, covering, and homogeneous film of poly( N ‐vinyl‐2‐pyrrolidone) appears on the electrode. The insolubility of the polymer in its classical solvents implies the existence of…
A systematic efficiency analysis for shape memory alloy (SMA) actuators is presented. Two different actuator configurations are investigated, and the SMA properties which govern efficiency are determined. The efficiency is shown to be a function of yield stress, recovery stress, maximum strain, latent heat of transfor…
Abstract In specimens of Mn skarn from the type locality of Långban, hyalotekite, (Ba,Pb,K) 4 Ca 2 − (Si,B,Be) 12 O 28 F, occurs in a matrix consisting mostly of aegirine (⩽22 mol.% CaMnSi 2 O 6 ), andradite (⩽27 mol.% Mn 3 Fe 2 Si 3 O 12 ), hematite, pectolite, quartz, calcite, baryte, barylite, and hedyphane. Melano…
The high P fixation capacity of soils rich in x‐ray amorphous minerals has been well documented. Some Andisols in central Guatemala which have received additions of volcanic ash have extraordinarily high extractable P levels with acidic extractant. These ash materials have low fixing capacities but they weather rapidl…
Abstract XPS measurements were performed on in situ split KTaO 3 , KNbO 3 , and cubic KTa 0. 69 Nb 0. 31 O 3 single crystals. The spectra are compared with the results of electronic structure calculations for the pure bulk materials in the cubic phase, based on the self‐consistent scalar‐relativistic linearized muffin…