Materials Literature
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Pressmud is an unavoidable waste generated from sugar industries. Pressmud is rich in many plant nutrients and it also has properties to ameliorate degraded soils. For this reason pressmud is believed to be of much use in agriculture. Many research works indicate that application of pressmud improves soil fertility, n…
In superlattice (SL) structures an enhancement of the thermoelectric figure of merit ZT compared to homogeneous materials can be achieved by reduction of the thermal conductivity /spl lambda/. In this context thermoelectric properties of PbTe/ PbSe/sub x/Te/sub 1-x/-SL's, and PbTe(BaF/sub 2/) doping superlattices (SL)…
Al 2 Cu thin films (∼382 nm) are fabricated by melting and resolidifying Al/Cu bilayers on a SiO 2 on Si(100) substrate in the presence of a ∼3 nm Al 2 O 3 passivating layer. X-ray photoelectron spectroscopy (XPS) measures a 1.0 eV shift of the Cu 2 p 3 / 2 peak and a 1.6 eV shift of the valance band relative to metal…
The effects of a series of small structural changes to (S)-5-nitro-N-(1-phenylethyl)pyridin-2-amine on its solid state non-linear optical properties, including the phenomenon of rotating dielectric axes, have been investigated. Installation of a methyl group in the 3-position of the heterocyclic ring or at the amino n…
The effect of thermal/electrical poling on the surface structure of 30ZnO·70TeO 2 glass has been investigated by means of IR reflectance and X‐ray photoelectron spectroscopy (XPS). All the poled glasses exhibit a common characteristic that the second‐order nonlinearity is induced preferentially in an anode‐side surfac…
Abstract The ordered, low-temperature phase of the globular organic molecule norbornene, (bicyclo[2.2.1]hept-2-ene, C 7 H 10 ), has been determined by high resolution powder X-ray diffraction using synchrotron radiation, by auto-indexing, then by intensity extraction and direct methods using the EXPO package. The stru…
The structure of a crystalline approximant (called “PD3c phase”) in an Al71.5Co16Ni12.5 alloy annealed at 900°C for 120 h has been studied by high-angle annular detector scanning transmission electron microscopy (HAADF-STEM) and high-resolution transmission electron microscopy (HREM). The PD3c phase has an orthorhombi…
Polyurea microcapsules containing 2- chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl) acetamide as the active agent were prepared by the method of interfacial polycondensation with methylene bis(phenyl isocyanate) the multifunctional isocyanatae, hexamethylene diamine as the diamine, and anionic (SLS) as the emulsifying…
Temperature programmed thermal desorption spectrometry (TPD) is used to study kinetics of molecular hydrogen release after sorption of hydrogen atoms. A sharp decrease of hydrogen release rate is observed if linear heating of the sample is interrupted at any intermediate temperature. A similar behaviour of release cur…
By using a vertical sectioning method (VSM) or secondary electron line scanning method (SELSM), the fractal dimension DS for surface, DL for scanning profile were measured quantitatively on some typical fracture surfaces, namely cleavage fractures, dimple fractures and fatigue fractures of composite materials. It was…
The crystallization mechanism of Al-TS-1 zeolite has been investigated using amorphous wetness-impregnated Al2O3–TiO2–SiO2 xerogels as raw materials. Samples with different degrees of crystallinity have been prepared and characterised by means of conventional techniques. The catalytic activity of the Ti and Al centres…
A hierarchy of mechanism-based phenomenological models, comprising linear, piecewise-linear, and nonlinear springs and friction elements, are presented for the pseudoelastic damping behavior of Shape Memory Alloys. The constitutive equations and a method for identifying the model parameters from experimental hysteresi…
Ultrafine-grained structures, having grain size of 1μm or less in diameter have shown high rate superplasticity at lower temperatures compared to the conventional superplastic forming conditions. Many techniques have been developed to produce the ultrafine-grained structures primarily by severe plastic deformation, wh…
Low-temperature sintering of PZT was studied with the use of LiBiO2 (LBiO) as a sintering aid. PZT powders with LBiO additive were densified at 750°C for 2h to sintered bodies with relative density of 95%. Addition of the sintering aid was effective for improving the sinterability of PZT powders and piezoelectric/ferr…
Formation of Au nano-particles on TiO2(110) from a gold–phosphine complex Au(PPh3)(NO3) was studied by environment-controlled atomic force microscopy (AFM). The Au complex began to agglomerate as particles larger than 4.2 nm in height on calcination in dry air at a temperature as low as 363 K. The size of the agglomer…
Bis-(3-hydroxypropyl) 2,6-naphthalenedicarboxylate (BHPN) was polymerized to poly(trimethylene 2,6-naphthalenedicarboxylate) (PTN) in the presence of various catalysts. The order of the catalytic reactivity was Sb(III) < Zr(IV) < Sn(IV) < Ti(IV). The influence of temperature and catalyst concentration on the propertie…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation M. Steigerwald; MeV Mott Polarimetry at Jefferson Lab. AIP Conf. Proc. 1 June 2001; 570 (1): 935–…
The hydrogen storage capacity in mechanically treated single wall carbon nanotubes (SWNTs) is investigated in this paper. In order to open the nanotubes three mechanical methods were applied: ball milling, ultrasonication and rubbing. Changes induced by the treatment were analyzed by Raman spectroscopy. The amount of…
MPB for repair of concrete was prepared by proportionally mixing burned MgO powder(M) with NH 4H 2PO 4 powder(P) and setting modifying admixtures. It has excellent properties such as rapid setting with high strength, high bonding strength to old concrete and so on. The study was focused on the key factors influencing…
It is well known that water treeing in polyethylene (PE) is sensitive to frequency, but there is not yet a reliable analytic model describing this empirical observation. We show from existing published data that the length L of water trees grown in the laboratory under one given ionic solution varies linearly when plo…