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  • 1
    Electronic Resource
    Electronic Resource
    Dispersion and thermal stability of vanadium oxide catalysts supported on titania-silica mixed oxide (1993)
    Springer
    Catalysis letters 20 (1993), S. 317-327 
    Details
    ISSN: 1572-879X
    Keywords: Vanadia ; titania-silica ; dispersion ; monolayer ; oxygen uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The influence of heat treatments on the dispersion and thermal stability of series of titania-silica mixed oxide supported vanadia catalysts has been investigated by X-ray diffraction, infrared, oxygen chemisorption and surface-area measurements. The results of V2O5/TiO2-SiO2 catalysts calcined at 773 K suggest that vanadia (upto 20 wt%) is in highly dispersed state on the carrier. Thermal treatments at 873 K and above transform vanadia and titania into crystalline phases and then TiO2 anatase into rutile. In the absence of vanadia the TiO2-SiO2 remains unaffected by thermal treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00769304
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dispersion and thermal stability of vanadium oxide catalysts supported on titania-alumina binary oxide (1996)
    Springer
    Catalysis letters 36 (1996), S. 187-193 
    Details
    ISSN: 1572-879X
    Keywords: vanadia ; titania-alumina ; dispersion ; monolayer ; oxygen uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Titania-alumina binary oxide supported vanadia catalysts calcined at different temperatures were studied by X-ray diffraction, infrared, oxygen chemisorption and surface area measurements to establish the effects of vanadia loading and thermal treatments on the structure of the dispersed vanadium oxide species. The results suggest that vanadia when calcined at 773 K is in highly dispersed state on the support surface. This dispersion is mostly retained upto a calcination temperature of 873 K. However, thermal treatments above 873 K transform vanadia and titania into crystalline phases and then TiO2 anatase into rutile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00807618
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    X-ray diffraction studies of barium potassium Chromate Pigments (1965)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 335 (1965), S. 206-209 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Auf röntgenographischem Wege wird gezeigt, daß das als Pigment Verwendung findende Bariumkaliumchromat(VI) durch Erhitzen oder auch durch Vermahlen bei Zimmertemperatur einer BaCrO4/K2CrO4-Mischung entsteht.
    Notes: X-ray studies of barium potassium chromate pigment prepared by different methods have been made. It is observed that the pigment is produced by heating a mixture of BaCrO4 and K2CrO4 and also by grinding the mixture at room temperature.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19653350310
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    Paper (German National Licenses)
    Fulltext
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