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  • 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.
  • 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. (en)
  • 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. (cs)
Title
  • Hydrous aluminium-oxides prepared by homogeneous precipitation from aluminium(III)sulphate with urea
  • Oxidy hlinité připravené homogenním srážením Al2(SO4)3 s močovinou ve vodném prostředí (cs)
  • Hydrous aluminium-oxides prepared by homogeneous precipitation from aluminium(III)sulphate with urea (en)
skos:prefLabel
  • Hydrous aluminium-oxides prepared by homogeneous precipitation from aluminium(III)sulphate with urea
  • Oxidy hlinité připravené homogenním srážením Al2(SO4)3 s močovinou ve vodném prostředí (cs)
  • Hydrous aluminium-oxides prepared by homogeneous precipitation from aluminium(III)sulphate with urea (en)
skos:notation
  • RIV/61388980:_____/06:00040356!RIV07-MSM-61388980
http://linked.open.../vavai/riv/strany
  • 22;26
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(1M0577), Z(AV0Z40320502)
http://linked.open...iv/cisloPeriodika
  • 1
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 478556
http://linked.open...ai/riv/idVysledku
  • RIV/61388980:_____/06:00040356
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • urea; homogeneous precipitation; alpha-boehmite (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • CZ - Česká republika
http://linked.open...ontrolniKodProRIV
  • [CCFB0445D108]
http://linked.open...i/riv/nazevZdroje
  • Ceramics - Silikáty
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 50
http://linked.open...iv/tvurceVysledku
  • Szatmary, Lorant
  • Šubrt, Jan
  • Bakardjieva, Snejana
  • Štengl, Václav
  • Lukáč, Jozef
http://linked.open...n/vavai/riv/zamer
issn
  • 0862-5468
number of pages
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