Materials Literature
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The hypothesis that a synergistic effect by fine SiC dispersoids operating on the submicrometer scale is capable of enhancing the deformation and fracture properties of Si 3 N 4 ceramics has been examined. In order to single out the effect of the SiC dispersion from other microstructural factors affecting the material…
Multilayer chip inductors were characterized using analytical electron microscopy. The chip inductors consist of silver internal electrode sandwiched between low‐temperature‐fired, Ni‐Zn‐Cu ferrite layers. It was found that the cooling rate affected the inductance of the chip inductor. Elastic strain fields were obser…
As third-generation synchrotron facilities are constructed and go online both in the US and in foreign countries, even more applications of synchrotron radiation will be realized. Both basic and applied research possibilities are manyfold, including studies of materials mentioned below and those that are yet to be per…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxometalate Catalysis of the Aerobic Oxidation of Hydrogen Sulfide to SulfurMason K. Harrup and Craig L. HillCite this: Inorg. Chem. 1994, 33, 24, 5448–5455Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue 1 November…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the Influence of the Morphological Structure on the Liquid Crystalline Behavior of Liquid Crystalline Side Chain Block CopolymersH. Fischer, S. Poser, M. Arnold, and W. FrankCite this: Macromolecules 1994, 27, 24, 7133–7138Publication Date (Print):November 1, 1994Publicat…
The magnetic properties of a series of Nd2Fe17−xAlx solid solutions, with x equal to 2.04, 4.01, 5.97, 7.94, and 9.06, have been studied by magnetic measurements, neutron diffraction, and Mössbauer spectroscopy. Magnetization studies indicate that the Curie temperature increases from 330 K in Nd2Fe17 to a maximum of ∼…
The mechanism and control of ferroelectric polarization fatigue (loss of polarization with cycling) in donor- and acceptor-doped BaTiO3 ceramics and Pb(Zr1−xTix)O3 (PZT) thin films has been investigated. Experimental results clearly demonstrate that fatigue behavior is related to the defects within the materials. Dono…
I report significant improvements to the differential method of Chandezon et al. [ J. Opt. Soc. Am.72, 839– 846 ( 1982)]. The R-matrix propagation algorithm is used to remove completely the previously existing limitations on the total coating thickness and on the total number of coated layers. I analyze the symmetry p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFacile Synthesis of meso-Tetrakis(perfluoroalkyl)porphyrins: Spectroscopic Properties and X-ray Crystal Structure of Highly Electron-Deficient 5,10,15,20-Tetrakis(heptafluoropropyl)porphyrinStephen G. DiMagno, R. Allen Williams, and Michael J. TherienCite this: J. Org. Chem.…
In the following text an attempt has been made to condense the main points of the MEIPIC-2 conference, to correlate certain results scattered over different contributions, to give some comments, suggestions for future work and a few historical reference points. Those contributions which have been less discussed, refle…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlternating Chains with Ferromagnetic and Antiferromagnetic Interactions. Theory and Magnetic PropertiesJuan J. Borras-Almenar, Eugenio Coronado, Jacques Curely, Roland Georges, and Jean Claude GianduzzoCite this: Inorg. Chem. 1994, 33, 23, 5171–5175Publication Date (Print):…
The synthesis and (chir)optical properties of a highly regioregular optically active 3-substituted polythiophene are reported. Using the McCullough method a regioselectivity of more than 98% is found for the head-to-tail coupling in 3-[2-((S)-2-methylbutoxy)ethyl]polythiophene 1. Contrary to the small effects observed…
Boron nitride (BN) thin films have been grown on [100] oriented single crystal Si, diamond, Cu and Ni substrates by ion beam assisted deposition using electron beam evaporation of boron together with simultaneous bombardment by nitrogen and argon ions. Characterization by Fourier-transform infrared spectroscopy and hi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNeutron and X-ray Structural Characterization of the Hexaaquavanadium(II) Compound VSO4.cntdot.7H2OF. Albert Cotton, Larry R. Falvello, Carlos A. Murillo, Isabel Pascual, Arthur J. Schultz, and Milagros TomasCite this: Inorg. Chem. 1994, 33, 24, 5391–5395Publication Date (Pr…
Abstract Selective catalytic reduction of NO x has been recognized as a very effective method to achieve low NO x emissions. A family of versatile catalyst technologies has been developed by Engelhard to control NO x emissions over a wide range of operating temperatures, 177 to 593°C (350 to 1100°F). Reaction mechanis…
The 1:1 compound, CeA1O 3 , in the system Ce 2 O 3 –Al 2 O 3 has been synthesized from the oxides and shown to have a perovskite‐like tetragonal unit cell with the lattice parameters a = 3.763 and c = 3.792 Å. A new XRD pattern is suggested for CeA1O 3 . This compound is shown to be stable up to 1950°C. The 1:11 compo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoenhanced van der Waals Attractive Force of Small Metallic ParticlesKeisaku KimuraCite this: J. Phys. Chem. 1994, 98, 46, 11997–12002Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue 1 November 1994https://pubs.acs.o…
Most materials (with the possible exception of f.c.c. metals) exhibit the well-known brittle-to-ductile transition (BDT) with increase in temperature. The variation of the fracture toughness, (K), with temperature is usually gradual in the brittle regime, but a dramatic rapid increase occurs over a narrow temperature…
Abstract Insight into the supramolecular structure formed by a polymethacrylate with a highly tapered side chain is obtained from parallel X‐ray analysis of oriented fibers of the polymer and its monomeric precursor. The polymer is poly(2‐{2‐[2‐(2‐methacryloyloxyethoxy)ethoxy]ethoxy}ethyl 3,4,5‐tris(p‐dodecyloxybenzyl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRate Mechanism of Plasticity in the Crystalline Component of Semicrystalline Nylon 6L. Lin and A. S. ArgonCite this: Macromolecules 1994, 27, 23, 6903–6914Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue 1 November 1994…