Showing papers in "Materials Research Bulletin in 2002"

TL;DR: In this paper, the authors showed that the as-prepared nanorods are composed of NiO with diameter of 10-80 nm, and lengths ranging from 1 to 3 micrometers.

TL;DR: In this paper, multi-walled carbon nanotubes (MWNTs) were sonicated in the dimethylformamide solution of poly(vinylidene fluoride) (PVDF), and the PVDF-covered MWNTs were then melt-blended with poly(methyl methacrylate) (PMMA).

TL;DR: In this article, an in situ Raman spectroscopic study was conducted to explore the pressure-induced phase transformation of ferrite MgFe2O4 to 516 GPa.

TL;DR: In this article, the dielectric relaxation spectroscopy of PANI-PVA composites has been investigated in the temperature range 110-300 K and in the frequency range 200-10 MHz near the percolation threshold.

TL;DR: In this article, three iron oxide pigments: hematite, goethite and magnetite, have been synthesized from the copperas byproduct produced as a waste material in large quantities in the titanium dioxide plant in Chemical Works “Police,” Poland.

TL;DR: In this paper, the temperature of formation and crystallinity of iron phosphate, FePO 4, is critical in determining its electrochemical behavior in lithium cells, and the capacity of up to 140 mAh/g were obtained at a current density of 0.2 mA/cm 2.

TL;DR: The surface analysis of polymorphic calcium carbonate (CaCO3) compounds, namely, calcite, aragonite, and vaterite were carried out by X-ray photoelectron spectroscopy (XPS) as discussed by the authors.

TL;DR: In this paper, a non-reducible dielectric composition satisfying X8R specifications (−55 to 150°C, ±15%) for automotive applications was investigated in a BaTiO 3 MgCO 3 MnO 2 -rare earth elements (La, Pr, Gd, Tb, Dy, Ho, Er, Yb, Lu) system.

TL;DR: In this paper, the effects of preparation conditions and monovalent, bivalent and trivalent cation doping on cathodoluminescence (CL) properties of the films were studied.

TL;DR: In this article, the synthesis of nanoparticulate ZnO via an aqueous carboxylate gelation route is presented starting from a solution of zinc acetate with citric acid as a complexing agent, a solid glassy gel is obtained after drying that is converted into a fine powder by calcination.

TL;DR: In this paper, the photocatalytic activity of CaTiO3 powder was further supported on electrochemical grounds in that the photo-induced current spectrum measured between a single crystal and a Pt electrode without applied voltage in water showed a maximum near 4.1 eV.

TL;DR: In this article, the effect of copper as reinforcement with the microstructural and mechanical properties of magnesium-based composite with 17.95% of copper reinforcement was fabricated using an innovative DMD technique followed by hot extrusion.

TL;DR: In this paper, Na-A and -X zeolites were synthesized from waste solutions in conversion of coal fly ash (Fa) to zeolite using NaOH solutions at 85°C.

TL;DR: In this paper, a simple one-step reaction in the presence of a nonionic surfactant, PEG 400, has been developed to synthesize CuO nanowiskers with diameters of approximately 2-10nm and lengths of more than 100nm.

TL;DR: In this article, the influence of SnO 2 doping concentration, heat-treatment temperature and film thickness on the super-hydrophilicity and photocatalytic activity of composite films was studied.

TL;DR: In this article, nano-sized hexagonal BN particulates were homogeneously dispersed within Al 2 O 3 grains as well as at grain boundaries, and they exhibited excellent machinability, which could be drilled using conventional hard metal alloy drills.

TL;DR: This article showed that Eu 2+ ions entered into the CaF 2 crystalline phase and gave a much stronger emission in the glass-ceramics than in the corresponding glass.

TL;DR: In this paper, the electrical conductivity of yttrium-doped SrTiO3 with transition metals added as acceptor dopants (V, Mn, Fe, Co, Ni, Cu, Zn, Mo, Mg, Zr, Al, or Ga) was measured by the dc four-probe method at 600-900°C in reducing atmospheres.

TL;DR: A PAN-based gel polymer electrolyte with possible iodide ion conductivity was prepared by incorporating a mixture of Pr4N+I−, iodine, EC and PC in PAN.

TL;DR: In this paper, by chemical reaction of CeCl3 and NaOH on carbon nanotube solution and subsequent heat treatment, ceria nanoparticles supported on carbon Nanotubes were prepared.

TL;DR: In this article, the hydrophobic properties of tetramethoxysilane (TMOS)-based silica aerogels were studied using contact angle measurements, infrared spectroscopy and thermal analysis.

TL;DR: In this article, a simple, least energy intensive, efficient, low temperature chemical process for the production of copper powder of narrow size distribution is described, which involves reduction of copper salts by glycerol under atmospheric conditions at a temperature below 240°C.

TL;DR: The effects of sintering aids on the microstructures and microwave dielectric properties of SmAlO3 ceramics were investigated in this article, where CuO and ZnO were selected as SSAs to lower the SSA temperature.

TL;DR: In this paper, Li ion conducting glass and glass ceramic of the composition Li 1.4 [Al 0.4 Ge 1.6 (PO 4 ) 3 ], have been synthesized and experiments with different electrodes proved that the lithium electrodes provided accurate values for the ionic conductivity using impedance spectroscopy.

TL;DR: In this article, the photoluminescence and the excitation spectra of Bi3+ in pyrochlore Y2Sn2O7 have been investigated in the temperature range of 15-300 K.

TL;DR: Strontium ferrite nanoparticles were prepared by coprecipitation in a PAA aqueous solution and the average diameter of the mixed hydroxide precipitates was 3.1 µm.

TL;DR: In this paper, a hydrothermal reduction route was employed for the synthesis of Sb 2 Se 3 semiconductor nanorods, and the role of hydrazine as both the reducing agent and the coordinator was also found to be crucial for the formation of the rod-like morphologies.

TL;DR: In this paper, the vacuum ultraviolet excitation spectra of phosphors (La,Gd)PO4:RE3+ (RE=Eu or Tb) and X-ray photoelectron spectra were investigated.

TL;DR: In this paper, two kinds of nickel nanoparticles are successfully prepared: carbon encapsulated Ni nanoparticles Ni(C) and pure Ni particles coated with NiO layers Ni(O).

TL;DR: In this article, the optimal contents of polycrystalline Te-doped CoSb 3 materials with various Te content have been determined for maximum figure of merit ZT.