Showing papers in "Materials Research Bulletin in 1999"

TL;DR: In this article, the anti-wear ability of DDP-nano Cu as additive in liquid paraffin was examined with a four-ball machine and it was found that the modified copper nanoparticles showed different antiwear ability depending on their particle size.

TL;DR: In this article, a new nonlinear optical crystal of coordination complex, zinc cadmium tetrathiocyanate (ZnCd(SCN)4), was successfully synthesized through several reactions in water.

TL;DR: Growth of CdS in three different liquid crystalline phases demonstrating the versatility of liquid crystal templating of inorganic solids was studied in this article, where a hexagonal liquid crystal containing rod-like pores of 3 nm diameter was obtained.

TL;DR: The crystal structure of Ca2Fe2O5 has been studied as a function of temperature up to 1000°C as discussed by the authors, and the magnetic structure was refined in space group Pcm′n′.

TL;DR: In this paper, the Ramaman spectra of Y2O3 single crystal were recorded at room temperature in a diamond anvil cell up to a pressure of 22 GPa and two phase transitions were detected at pressures of 12 and 19 GPa.

TL;DR: In this article, single phase perovskite 0.9Pb(Mg1/3Nb2/3)O-3-0.1(PbTiO3) ceramics were prepared using the columbite precursor method after optimizing the synthesis conditions.

TL;DR: In this article, the authors reported that SiC exhibited a uniformly distributed fine-grained microstructure and a highly intergranular fracture behavior, and the maximum values of strength and toughness were as high as 650 MPa and 7.5 MPa·m1/2, respectively.

TL;DR: In this paper, a photon counting system was used to investigate the triboluminescence intensity of various inorganic bulk materials and films with various preparation conditions, and it was found that ZnS doped with 5 at% Mn exhibited the strongest TL intensity among the materials investigated.

TL;DR: In this paper, the microstructure and phase transformation behavior of doped nanostructured titania has been studied with a view to understanding the microstructural development for possible applications in the areas of catalysis and electronic ceramics.

TL;DR: In this article, the authors investigated the effect of nickel in the iron sublattice of LaFeO3−δ and found that it increased oxygen nonstoichiometry, electrical conductivity, and thermal expansion of perovskites.

TL;DR: Graphite intercalation compounds containing the bis(trifluoromethanesulfonyl) imide anion, C x N(SO 2 CF 3 ) 2, were prepared under ambient conditions in 48% hydrofluoric acid, using the oxidant K 2 MnF 6. Within seconds, the graphite phase was no longer observed, and a stable, stage 2 product with x = 37 and d i = 8.1 A was obtained in 15 min this article.

TL;DR: In this paper, a solid-state sintering route was used for the preparation of Ceramic samples of Bi{sub 7}Fe{sub 3}Ti{sub 2}O{sub 21} and isostructural with other bismuth layer structured ferroelectrics.

TL;DR: In this article, nano-CoTiO 3 powder was used as a new type of gas-sensitive material for detecting ethanol gas, which was obtained by a precipitation method and characterized by X-ray diffraction and transmission electron microscopy (TEM).

TL;DR: In this paper, orthorhombic α-Zn3(PO4)2·4H2O, α-hopeite, was synthesized from an aqueous solution of zinc acetate and orthophosphoric acid.

TL;DR: In this article, Tetrapod-shaped ZnO whiskers were prepared with high yield and good purity in a short reaction time by a new method, the oxidation of pellets or otherwise shaped metallic zinc at 500-800°C under atmospheric pressure.

TL;DR: In this paper, three different fluxes were used: KOH/NaOH, NaNO 3/KNO3, and LiCl/KCl eutectic mixtures.

TL;DR: In this article, the possible interactions between La{sub 0.9}Sr{sub 1{minus}x}La{sub x}O{sub 2{minus]x/2} solid solution and Gd[sub 2}O[sub 3]-doped solid oxide fuel cells (SOFC) at 1,300 C were studied with diffusion couples and fired powder mixtures.

TL;DR: The shape and width of the hysteresis curve were related to the microstructure of the films and strongly depend on the preparation procedure as discussed by the authors, which was the case with vanadium oxide thin films.

TL;DR: The structure of Ag{sub 2}O-M{sub x}O{sub y}-TeOµsub 2µ (TeO µsub 3µ) polyhedra were investigated by Raman spectroscopy.

TL;DR: In this paper, pure Au and Au-doped VO 2 thin films were prepared from vanadium alkoxide precursors via the sol-gel process, and a solution of VO(OPr i ) 3 was spin-coated onto silicon substrates and heat-treated under a reducing atmosphere.

TL;DR: The surface reactivity of synthetic poorly crystalline apatites, similar to bone mineral, is reported in this article, where the interaction of bovine serum albumin molecules with the solid was related to the structure, the short-range order, and the composition of the crystals.

TL;DR: In this paper, the effect of CuO additions on the firing temperature of the anatase phase of TiO 2 has been investigated using X-ray diffraction, transmission electron microscopy, and dilatometry.

TL;DR: In this paper, the composites were characterized by IR, X-ray diffraction (XRD), and scanning electron microscopy (SEM) studies, and the bulk conductivity was in the range of (1.3 to 26) × 10−5 S/cm, depending on the FeCl3-impregnation level and on the polypyrrole loading.

TL;DR: In this paper, the phases, microstructure, and electrical and photoelectrochemical properties of the TiO2-ZnO system were investigated as a function of processing variables such as ZnO content and heat treatment condition.

TL;DR: LiCoO2 was synthesized by an oxidation of Co2+ ions in aqueous solutions by lithium peroxide in the presence of excess lithium hydroxide, followed by firing at 400-900°C as discussed by the authors.

TL;DR: In this paper, the ordered oxygen-deficient perovskite YBaMn2O5 has been synthesized as a monophasic sample and a variable temperature neutron diffraction study of this phase has been carried out.

TL;DR: In this article, a spray-depositing aqueous and nonaqueous media, at optimized substrate temperature and solution concentration, onto optically flat glass substrates was used to obtain semiconducting antimony triselenide thin films.

TL;DR: In this article, the In 2 O 3 nanoparticles were isolated from each other and highly uniformly dispersed inside the pores of a mesoporous silica host, which were less than 8 nm in diameter.

TL;DR: In this paper, the synthesis of poorly crystalline iron(III) hydrous oxides and basic salts (ferrihydrite, schwertmannite, and jarosite) consisting of uniform spherical particles of characteristic shape with a diameter of ∼10 μm is described.

TL;DR: In this article, a mixture of poly(butylene terephthalate) (PBT) and poly(ethylene terephate) polymers were formed using ball milling technique and characterized by means of differential scanning calorimetry (DSC) and X-ray diffraction (XRD).