Publication detail

The chemical composition and morphology of oxidic ceramics at filtration of steel deoxidised by aluminium

KAVIČKA, F. STRÁNSKÝ, K. BAŽAN, J. DOBROVSKÁ, J. SEKANINA, B.

Czech title

Chemické složení a morfologie oxidické keramiky při filtraci oceli dezoxidované hliníkem

English title

The chemical composition and morphology of oxidic ceramics at filtration of steel deoxidised by aluminium

Type

conference proceedings

Language

en

Original abstract

Composition and morphology of filter ceramics was investigated during filtration of steel deoxidised by aluminium. Filtration was realised with use of filters based on oxidic ceramics Cr2O3, TiO2, SiO2, ZrO2, Al2O3, 3Al2O3.2SiO2 and MgO.Al2O3. It was established that change of interphase (coating) occurs during filtration of steel on the surface of capillaries of ceramics, where content of basic oxidic component decreases. Loss of oxidic component in the coating is replaced by increase of oxides of manganese and iron and it is great extent inversely proportional to the value of Gibbs' energy of oxide, which forms this initial basis of ceramics.

Czech abstract

V práci bylo sledováno chemické složení a morfologie keramiky filtru v průběhu filtrace oceli, dezoxidované hliníkem. K filtraci byly použity filtry na bázi oxidické keramiky Cr2O3, TiO2, SiO2, ZrO2 , Al2O3, 3Al2O3.2SiO2, MgO.Al2O3. Bylo zjištěno, že v průběhu filtrace oceli dochází na povrchu kapilár keramiky ke změnám chemického složení a k tvorbě mezifáze (povlaku), kde se obsah základní oxidické složky filtru snižuje. Úbytky oxidické složky v povlaku jsou nahrazovány přírustky oxidu manganu a železa a jsou do značné míry nepřímo úměrné hodnotě Gibbsovy energie oxidu, který tuto základní výchozí bázi keramiky tvoří. Úměrně s poklesem Gibbsovy energie základní báze oxidické keramiky se také snižuje filtrační účinnost příslušného filtru a zhoršuje se metalografická mikročistota filtrované oceli.

English abstract

Composition and morphology of filter ceramics was investigated during filtration of steel deoxidised by aluminium. Filtration was realised with use of filters based on oxidic ceramics Cr2O3, TiO2, SiO2, ZrO2, Al2O3, 3Al2O3.2SiO2 and MgO.Al2O3. It was established that change of interphase (coating) occurs during filtration of steel on the surface of capillaries of ceramics, where content of basic oxidic component decreases. Loss of oxidic component in the coating is replaced by increase of oxides of manganese and iron and it is great extent inversely proportional to the value of Gibbs' energy of oxide, which forms this initial basis of ceramics.

Keywords in Czech

Keramika filtru, chemické složení, morfologie, termo- dynamická stabilita, filtrační účinnost

Keywords in English

Ceramic of filter, chemical composition, morphology, thermo-dynamics stability, filter efficiency

Released

22.04.2010

Publisher

TU Košice

Location

Košice

ISBN

978-80-553-0387-1

Book

Proceedings of VI. International scientific conference Refractories, furnaces and thermal insulations

Pages from–to

99–104

Pages count

6

BIBTEX


@proceedings{BUT65848,
  author="František {Kavička} and Karel {Stránský} and Jiří {Bažan} and Jana {Dobrovská} and Bohumil {Sekanina},
  title="The chemical composition and morphology of oxidic ceramics at filtration of steel deoxidised by aluminium",
  booktitle="Proceedings of VI. International scientific conference Refractories, furnaces and thermal insulations",
  year="2010",
  month="April",
  pages="99--104",
  publisher="TU Košice",
  address="Košice",
  isbn="978-80-553-0387-1"
}