Materials Literature
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Compositional changes which take place during sintering of Pb(Zr,Ti)O 3 (PZT) containing excess PbO were studied. The excess PbO forms a liquid phase during the sintering process. The solubility of the TiO 2 component of PZT in liquid PbO is higher than that of ZrO 2 component. Thus, if an excess PbO exists, the compo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagneto-Structural Effects of the Jahn-Teller Distortions on 2,2'-Bipyrimidine-, (bpm-) Bridged Dinuclear Copper(II) Complexes: Crystal Structures and Magnetic Properties of [Cu2(bpm)(H2O)4(SO4)2].cntdot.3H2O and [Cu2(bpm)(H2O)8](SO4)2.cntdot.2H2OGiovanni De Munno, Miguel Ju…
Recent advances in ferroelectric thin film technology have generated significant interest for use as capacitor dielectrics in semiconductor memories. Ferroelectric non-volatile memories (NVRAMS) have several unique features which set them apart from floating-gate non-volatile memories, including high-speed write opera…
Molecular dynamics computer simulations were employed to investigate defect production, atomic mixing and chemical disordering in β-NiA1 owing to 10keV cascades. The embedded atom potentials of Voter and Chen (1989) were employed. Point defect energies and threshold displacement energies were also obtained. The defect…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison of the Lamellar Morphology of Microphase-Separated Cyclic Block Copolymers and Their Linear PrecursorsR. L. Lescanec, D. A. Hajduk, G. Y. Kim, Y. Gan, R. Yin, S. M. Gruner, T. E. Hogen-Esch, and E. L. ThomasCite this: Macromolecules 1995, 28, 9, 3485–3489Publicati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal Centers Connected by Conjugated Bridges. A Theoretical Evaluation of Delocalization EffectsMichael B. SponslerCite this: Organometallics 1995, 14, 4, 1920–1927Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April…
To what extent the host defense role of granule-associated antibacterial proteins and peptides of PMN includes extracellular action has not been established. To address this question, we have analyzed the antibacterial activity of cell-free (ascitic) fluid (AF) obtained from glycogen-induced sterile inflammatory rabbi…
Novel photo‐ and electroluminescent polymers based on poly( p ‐pyridyl vinylene), poly( p ‐pyridinium vinylene) and their butyl‐substituted derivatives are reported. The materials exhibit good fluorescence quantum yields and the butyl derivatives are soluble in conventional organic solvents. Highly luminescent thin fi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFunctional Model of Dopamine .beta.-Hydroxylase. Quantitative Ligand Hydroxylation at the Benzylic Position of a Copper Complex by DioxygenShinobu Itoh, Toshihiko Kondo, Mitsuo Komatsu, Yoshiki Ohshiro, Chunmin Li, Nobuko Kanehisa, Yasushi Kai, and Shunichi FukuzumiCite this…
Ab initio restricted Hartree–Fock 6-31G calculations are reported for the static longitudinal hyperpolarizability of the linear polyenes C4H6 through C44H46. Using a new extrapolation technique the infinite chain value in polyacetylene is determined with an accuracy similar to that achieved for small molecules. This i…
The paper describes how the classical formula of the Maxwell magnetic stress tensor may be extended to cover the magnetostriction phenomena. It is assumed that the ferromagnetic continuum is isotropic and conservative. The method takes into account the magnetic nonlinearity and it assumes that mechanical deflections a…
Abstract The influence of the spin reorientation phenomenon on the nucleation field of NdFeB magnets is analyzed based on the theory of micromagnetism. Results indicate that the temperature dependence of coercivity in the whole temperature range can be well described by the equation H c = (2 K 1 / M s ) × α K α ψ – N…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMixing Properties of Molten Alkali Nitrates Based on the Law of Corresponding StatesYutaka Tada, Setsuro Hiraoka, Takashi Achiwa, and Seung-Tae KohCite this: Ind. Eng. Chem. Res. 1995, 34, 4, 1461–1470Publication Date (Print):April 1, 1995Publication History Published online…
Abstract The compatibilizing effect of a polystyrene‐hydrolyzed poly( t ‐butyl acrylate) diblock copolymer (SBAH) on the phase structure, rheological properties, and mechanical properties of immiscible poly(2,6‐dimethyl‐1,4‐phenylene ether) (PPE) and polyamide‐6 (PA) blends was investigated. The SBAH was prepared by s…
The electronic defects in single crystals of yttria‐stabilized zirconia (YSZ) have been examined using electron paramagnetic resonance (EPR). The EPR spectra of hydrogen‐reduced YSZ single crystals are almost identical to those of polycrystalline yttria (12 mol%)‐stabilized zirconia‐titania, indicating that the Ti 3+…
Pressure-induced transformations in the structural and magnetic properties of ${\mathrm{CsMnF}}_{4}$ are reported. This behavior is analyzed in the framework of magnetostructural correlations within the layered perovskite A${\mathrm{MnF}}_{4}$ (A=Cs,Rb,K) series by using magnetic susceptibility and synchrotron x-ray p…
Previous work by the Authors has shown that small gypsum additions to compacted PFA—lime mixes lead to enhanced compressive strength during high-temperature (95°C) curing but that gypsum contents in excess of an optimum level result in a fall in strength. This strength variation is related to the nature of the reactio…
Abstract MgCl 2 supports were prepared by the recrystallization method with variation of agitation speed and MgCl 2 concentration of the MgCl 2 ‐methanol‐decane mixture. It was found that the particle size of MgCl 2 and MgCl 2 /TiCl 4 could be controlled by changing the MgCl 2 concentration in a methanol droplet or by…
Point defects have been produced in CaO, MgO, and α‐Al 2 O 3 single crystals by electron irradiation, and thresholds for atomic displacement have been measured using timeresolved luminescence spectroscopy. Oxygen displacement energies of approximately 50 eV have been determined; however, a temperature‐dependent thresh…
Polystyrene/Poly(Ethyl acrylate-n-Butyl acrylate) (PS/P(EA-nBA) latex interpenetrating polymer networks (LIPNs) were synthesized by a two stage emulsion polymerisation technique. The effects of fillers and PMMA/P(EA-EMA) LIPN on damping of the LIPNs have been investigated. The results indicate that inorganic fillers p…