Showing papers in "Materials Research Bulletin in 2004"

TL;DR: In this paper, the citric acid sol-gel combustion method has been used for the synthesis of nanocrystalline hydroxyapatite (HAP) powder from calcium nitrate, diammonium hydrogen phosphate and citric acids.

TL;DR: In this paper, the dielectric and piezoelectric properties of the SPS-sintered NbO 3 samples were investigated and compared to that of hot-pressed samples.

TL;DR: In this paper, the authors investigated the effect of thermal treatment temperature on the crystal size of NiFe2O4 nanoparticles and calculated the activation energy of nanoparticles formation during calcination.

TL;DR: The n-type tungsten oxide (WO{sub 3} polycrystalline thin films have been prepared at an optimized substrate temperature of 250 deg. C by spray pyrolysis technique as discussed by the authors.

TL;DR: Carbon fiber composites with an epoxy resin matrix were subjected to microwave-heating experiments in order to volatilise the polymer content and to produce clean fibres for potential reuse in high-grade applications.

TL;DR: In this article, the structure of the as-synthesized samples and the presence of intended anions in the interlayer gallery of hydrotalcites were determined by X-ray diffraction and FTIR spectroscopy.

TL;DR: In this article, large-scale CeO 2 nanowires were prepared successfully by an improved sol-gel process within the nanochannels of porous anodic alumina templates.

TL;DR: In this paper, a modified solution combustion approach was used for the first time in the preparation of nanosize zirconia toughened alumina (ZTA) composite, and the products formed were characterised by powder X-ray diffractometry, Transmission electron microscopy and BET surface area analysis.

TL;DR: The starting materials used for synthesizing hydroxyapatite (HA) were Ca(NO 3 ) 2 ·4H 2 O and H 3 PO 4 with a Ca/P ratio of 1.67 while poly(e-caprolactone) (PCL) was used as the biodegradable polymer as mentioned in this paper.

TL;DR: In this paper, the synthesis and study of oxygen-deficient rare earth nickelates were described and the boundaries of oxygen and cation homogeneity ranges of Nd 1− x NiO 3− δ were determined for the first time.

TL;DR: Sodium titanate nanowires from brookite (or anatase) nanocrystallites were synthesized by a hydrothermal treating in 10m NaOH aqueous solution at 180°C.

TL;DR: In this article, nano-sized Ce-doped YAG phosphor particles were synthesized by a mixed solvothermal method using the stoichiometric amounts of inorganic aluminum and yttrium salts.

TL;DR: In this article, the phase relation in the CeO 2 -Gd 2 O 3 system has been established under slow cooled conditions from 1400°C. Two phase regions, namely F-type cubic and C-Type cubic, were observed in this system, and the lattice thermal expansion coefficient was found to gradually increase on increasing the Ce 4+ content, within the C-type homogeneity range.

TL;DR: In this paper, the effect of (Li,Ce) or (K, Ce) doping on the structures and properties of bismuth layer-structured ferroelectric (BLSF) CaBi 4 Ti 4 O 15 -based ceramics was studied.

TL;DR: In this article, the role of B{sub 2}O{sub 3} in realizing the long phosphorescence of Eu(II)+Dy(III) doped strontium aluminates has been investigated.

TL;DR: LiFePO{sub 4} is a potential candidate for the cathode material of the lithium secondary batteries, and a co-precipitation method was adopted to prepare LiFePO[sub 4] because it is simple and cheap as discussed by the authors.

TL;DR: In this paper, one-step pretreatment of mixed HNO 3 and H 2 SO 4 was found effective in order to attain nanosized copper particles, the electroless plating parameters should be closely controlled; eg, the pH value of the plating solution, the temperature, and the concentration and titrating speed of HCOH.

TL;DR: In this article, the thermal decomposition of tungstic acids into WO 3 · n H 2 O, n = 1/3, 1, 2 was analyzed by TG and DSC methods.

TL;DR: In this paper, the structural properties of complex perovskite lead iron tungstate, Pb(Fe 2/3 W 1/3 )O 3 (PFW) which belongs to a class off disordered magnetoelectrics has been studied by neutron powder diffraction.

TL;DR: In this paper, a comparative study of gas sensing behavior of nanocrystalline nickel ferrite synthesized by micro-emulsion and hydrothermal method to liquefied petroleum gas (LPG) is presented.

TL;DR: In this article, Bismuth iron titanate (Bi 8 Fe 4 Ti 3 O 24 ) was synthesized by solid-state route and showed a ferroelectric transition around 776°C.

TL;DR: In this paper, the authors used polycrystalline discs of PbWO{sub 4} (PWWO-10), WO-sub 3} (WO-01), ZnWO(sub 4) (ZWWO)-10, PWO-28 and Z WWO-46 composites for humidity sensing.

TL;DR: In this paper, a model was presented to evaluate the concentration of species in a citric solution for preparing MgAl{sub 2}O{sub 4} ultrafine powder.

TL;DR: In this article, the microstructure of indium tin oxide thin films was analyzed in order to investigate its dependence on deposition pressure and annealing temperature, and a correlation between microstructures and electro-optical properties was also established.

TL;DR: In this article, the synthesis of YAG nanoparticles by the coprecipitation technique and the optimum conditions for the processing of transparent ceramics were discussed. But the results were limited.

TL;DR: In this paper, 3.0% lanthanide europium ion modified TiO 2 sol (Eu 3+ -TiO 2 ) was fabricated by chemical coprecipitation-peptization method with TiCl 4 as precursor.

TL;DR: In this paper, a direct template-exchange of hexavalent-more-than-5+ species was used to obtain a larger amount of UMCM-41 and MCM-48 in mesoporous mesovoids.

TL;DR: In this article, the zinc selenide (ZnSe) thin films are deposited onto glass substrate using relatively simple and inexpensive successive ionic layer adsorption and reaction (SILAR) method.

TL;DR: In this paper, the highly ordered polyaniline (PANI) nanotubes array was prepared by in situ polymerization using anodic aluminum oxide (AAO) as template.