Results 251 to 256 of about 928,519 (256)

The textured PbTiO3–A12O3 composite films prepared by the sol–gel method

International Journal of Inorganic Materials, 2001
Abstract The sol–gel method was used to prepare PbTiO 3 (PT) and PbTiO 3 –A1 2 O 3 (PT–AL) thin films on amorphous (SiO 2 glass) and crystalline (111) Si, and (0001) Al 2 O 3 ) substrates using the dip-coating technique. The films were examined by XRD methods to describe the phase composition, cell parameters and degree of texture, by electron ...
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NMR characterization on the preparation of sol–gel derived mixed oxide materials

International Journal of Inorganic Materials, 2001
Abstract The hydrolysis and polycondensation reaction of titanium(IV) isopropoxide was chemically modified by acetylacetone, ethylacetoacetate and triethanolamine. The reaction rates of these modified isopropoxides were investigated by 1 H NMR spectroscopy.
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Electrochromic characterization of Co(OH)2 thin film prepared by sol–gel process

Solar Energy Materials and Solar Cells, 1998
Abstract Electrochemical, spectroscopic and structural measurements were used to characterize the electrochromic behavior and stability of sol–gel deposited Co(OH) 2 thin films. These films were prepared from polymeric solutions containing cobalt methoxyethoxide precursor by spin coating technique.
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Optical fibre sensors sensitized by phenyl-modified porous silica prepared by sol–gel

Sensors and Actuators B: Chemical, 1999
Abstract Porous silica and phenyl-modified porous silica were prepared by sol–gel method as cladding for optical fibres and tested for the chemical detection of aromatic and alkane vapours. The refractive indices and optical attenuation of the layers have been determined from the measured angular distributions of the output optical power.
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Photoluminescence of TiO2: Eu3+ thin films obtained by sol–gel on Si and Corning glass substrates

Thin Solid Films, 2001
Abstract In this paper we report results on the fabrication and characterisation of thin films of titania (TiO 2 ), a novel host for the Eu 3+ activator ion. The titania films were produced by the sol–gel process at room temperature using the dip coating method and deposited on silicon and corning glass substrates. It is shown that different surface
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Electrochemical properties of defective Li1−xMn2−δO4 spinels prepared by a sol–gel method used as cathodes in lithium cells

Solid State Ionics, 1997
Abstract Lithium-deficient spinels of formula Li 1− x Mn 2− δ O 4 ( x =0.26–0.28) (0≤ δ ≤0.04) were synthetized by using a sol–gel method involving dissolution of Mn(acac) 3 (acac=acetylacetonate) and Li 2 CO 3 in propionic acid. Gel pyrolysis produced pure spinel phases of highly uniform particle shape.
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