Results 251 to 254 of about 234,496 (254)

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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Preparation of Y3Fe5O12/SiO2 nanocomposites by sol–gel method Influence of modifiers

International Journal of Inorganic Materials, 2001
Abstract This paper aims to characterise the phase relations in the system Y 3 Fe 5 O 12 /SiO 2 prepared by sol–gel method. Samples were characterised by X-ray diffraction, magnetic measurements and Mossbauer spectroscopy. The final phase composition strongly depended on preparation conditions in the early stages of preparation.
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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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