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Hydrous aluminium-oxides prepared by homogeneous precipitation from aluminium(III)sulphate with urea

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F06%3A00040356" target="_blank" >RIV/61388980:_____/06:00040356 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Hydrous aluminium-oxides prepared by homogeneous precipitation from aluminium(III)sulphate with urea

  • Original language description

    Easily filtrated alumina-oxides spherical precursors were prepared by homogeneous precipitation from aluminium(III) sulphate with urea. Urea was employed as precipitation agent. X-Ray powder diffraction (XRD) spectra identified three different phases, namely: alpha-boehmite, boehmite and hydrobasaluminite. The morphology of prepared samples was observing by SEM (scanning electron microscopy) equipped with EDX (energy dispersive analysis by X-rays). The spherical clusters were examined at small concentration and the hydrobasaluminite islands were observed at the largest concentration of reagents. The microstructure characteristics were obtained by BET (Brunauer-Emmett-Teller) and BJH (Barrel-Joyner-Halanda) methods. BET in wide range from 6 to 142 m(2)/g and the all kinds of porous distribution were acquired, respectively. These methods showed that relationship between phase structures and microstructure exists.

  • Czech name

    Oxidy hlinité připravené homogenním srážením Al2(SO4)3 s močovinou ve vodném prostředí

  • Czech description

    Snadno filtrovatelné sférické prekurzory oxidu hliníku byli připraveny homogenním srážením Al2(SO4)3 s močovinou ve vodném prostředí. Močovina se využívá jako precipitační činidlo. Produkt byl charakterizován práškovou rtg. difrakcí. Byly získané tři následující fáze: alfa-boehmite, boehmite and hydrobasaluminite. Morfologie byla pozorována pomocí skenovacího elektronového mikroskopu. Mikrostrukturní charakteristiky byly získány metodami BET a BJH. S rostoucím obsahem koncentrace reakčních látek se měnily nejenom fáze, ale také docházelo ke zvyšování iregularity morfologie. U alfa-boehmitu byly objeveny makropóry. V boehmitu byly objeveny mezopóry s makropóry a u hydrobasaluminitu byly všechny tři druhy pórů na stejné úrovni.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CA - Inorganic chemistry

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/1M0577" target="_blank" >1M0577: Research centre for nanostructures engineering</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2006

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Ceramics - Silikáty

  • ISSN

    0862-5468

  • e-ISSN

  • Volume of the periodical

    50

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    5

  • Pages from-to

    22-26

  • UT code for WoS article

  • EID of the result in the Scopus database