Showing papers in "Materials Letters in 2004"

TL;DR: In this article, the effects of polymer weight average molecular weight (MW) on the fiber structure of electrospun polyvinyl alcohol (PVA) have been studied and the average fiber diameter was between 250 nm and 2 μm.

TL;DR: In this paper, the thermal resistance of a vertical meshed heat pipe with nanofluid was measured and it was shown that the temperature of the heat pipe varies with the size of gold nanoparticles.

TL;DR: In this paper, the authors investigated the influence of HDPE-modified bituminous binders obtained by various mixing time, mixing temperature and HDPE content on the Marshall Stability, flow and Marshall Quotient (Stability to flow ratio).

TL;DR: In this article, solid polymer electrolyte films containing poly(vinyl alcohol) (PVA)/PMMA-LiBF4-X (X=EC, PC, DEC, GBL) were prepared by solvent casting technique.

TL;DR: In this paper, the feasibility of friction stir welding (FSW) for joining of copper was demonstrated on 4 mm thick copper plate at travel speed of 61 mm/min and tool rotation speed of 1250 rpm using a general tool steel as the welding tool.

TL;DR: In this article, the effects of porosity and pore size on the Young's modulus and peak stress increase with decreasing porosity, and the size of pore sizes.

TL;DR: In this paper, high-dispersed copper oxide (CuO) nanoparticles with an average size of 6 nm have been successfully prepared by a novel quick-precipitation method using X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-visible absorption spectroscopy and nitrogen adsorption.

TL;DR: In this paper, a solution-phase approach to the synthesis of selenium nanoparticles by reducing selenious acid solution with ascorbic acid in the presence of polysaccharides, such as chitosan (CTS), konjac glucomannan (KGM), acacia gum (ACG), and carboxymethyl cellulose (CMC) etc.

TL;DR: In this paper, a highly sensitive ZnO-TiO2 based thick film volatile organic compound (VOC) sensor had been developed, where TiO2 was mixed in ZnOs in various weight percentage (0, 1, 5% and 10%).

TL;DR: In this paper, double aging peaks are present in the age-hardening curves of Al-Si base alloys and the first peak is higher than the second one when aged at temperature above a certain temperature.

TL;DR: In this paper, temperature dependence of the frictional stress derived from the Hall-Petch relation for pure magnesium polycrystals was compared with the critical resolved shear stress for single crystals with orientation preferable for basal or non-basal slip systems.

TL;DR: In this paper, the average particle size of the SrAl2O4:Eu,Dy phosphor nanoparticles ranges from 15 to 45 nm as indicated by transmission electron microscopy (TEM).

TL;DR: In this paper, the authors presented order-of-magnitude conductivity data for carbon-included lithium iron phosphate (LFP) powders lightly pelletised as used as cathodes in Li-ion batteries.

TL;DR: In this article, Nypa fruticans Wurmb extract was found to be an effective inhibitor of the corrosion of mild steel in hydrochloric acid media, achieving an inhibition efficiency of 75.11% and 70.18% for DPC at 30 °C.

TL;DR: In this paper, the average particle size of the nanosized magnesium ferrite obtained is ∼3 nm, with a narrow size distribution, and magnetometric studies showed the existence of superparamagnetic state of the ferrite particles.

TL;DR: ZnS:Cu nanocrystals are prepared by solution synthesis technique, and the optimum range of synthesis temperature and the particle size/shape for the high photoluminescence (PL) properties of ZnS-Cu nanoparticles are investigated in this article.

TL;DR: In this paper, the microstructure, dielectric and piezoelectric properties of (Bi 1/2 Na 1/ 2 )TiO 3 -6BaTiO3 doped with Nb 5+, Co 3+ or La 3+ were studied for a candidate as lead-free, lead free, lead-resistant, and lead free ceramics.

TL;DR: In this paper, the microstructure of interfacial zone (IZ) of one kind of lightweight aggregate concrete was studied using Scanning Electron Microscope (SEM) equipped with an energy dispersive X-ray analysis system, as well as through back-scattered electron imaging (BSEI).

TL;DR: In this article, the formation and properties of Cd(OH)2 and CdO particles were monitored by X-ray powder diffraction (XRD), DTA, FT-IR spectroscopy and Field Emission SEM.

TL;DR: In this paper, a simple precipitation route was developed to synthesize magnetite (Fe3O4) nanoparticles with controlled size without any requirement of calcination step at high temperatures.

TL;DR: In this paper, the effect of the diameter and age of a bamboo stick on the compressive strength of the stick was investigated under scanning electronic microscopy, and the results indicated that the strength decreased significantly with the increase in its outer diameter.

TL;DR: In this paper, the tensile properties of polystyrene composites with different loading of titanium dioxide fillers were studied as a function of filler loading and an amino silane coupling agent has been used to improve adhesion between the filler and the matrix.

TL;DR: In this article, the authors used nanometer-sized Al2O3 particles (15 nm average diameter) as reinforcements to enhance the fracture toughness of a highly crosslinked, nominally brittle, thermosetting-unsaturated polyester resin.

TL;DR: In this paper, a constitutive equation for the flow stress has been defined and the test conditions for a homogeneous deformation evaluated and a higher accuracy could be obtained in material behaviour modelling for forging process simulation.

TL;DR: In this article, the Stober method was used to obtain monodisperse polystyrene/SiO 2 composite particles (PSCPs) with core-shell structure by in situ emulsion polymerization of styrene (St) on the surface of grafted silica nanoparticles.

TL;DR: In this paper, the properties of monodisperse rhombohedral α-Fe 2 O 3 nanoparticles modified by four different surfactants, namely, sodium dodecylsulfonate (SDS), DBS, cetyltrimethyl ammonium bromide (CTAB) and hexadecyipyridinium chloride (HPC), were characterized by means of Fourier transform infrared spectroscopy, X-ray diffraction (XRD), transmission electron micrograph (TEM) and magnetization measurements.

TL;DR: In this article, the surface characteristics of the wire-electro discharge machining process were studied and it was observed that more uniform surface characteristics are obtained with coated wire electrode. But the most sensitive parameter was the time between two pulses.

TL;DR: A modified sol-gel route, by combining gelation and coprecipitation processes, was developed for the synthesis of high surface area MgAl 2 O 4 spinel precursors as mentioned in this paper.

TL;DR: The Young's modulus of an electroplated nickel (Ni) thin film suitable for microelectromechanical applications has been investigated as a function of process variables: the plating temperature and current density.

TL;DR: In this article, the CaFe2O4 composition was studied, in order to analyze its physical and chemical behavior, verifying its stability under industrial conditions, when applied as pigments.