Detail publikačního výsledku

Sintering of gadolinia-doped ceria prepared by mechanochemical synthesis

MACA, K.; CIHLÁŘ, J.; ČÁSTKOVÁ, K.; ZMEŠKAL, O.; HADRABA, H.

Originální název

Sintering of gadolinia-doped ceria prepared by mechanochemical synthesis

Anglický název

Sintering of gadolinia-doped ceria prepared by mechanochemical synthesis

Druh

Článek WoS

Originální abstrakt

Gadolinia-doped ceria (GDC) ceramics were prepared by mechanochemical synthesis of ceria and gadolinia (10mol.%) powders with subsequent uniaxial pressing and pressureless sintering. The mechanochemical synthesis was conducted in an attritor with different dispersion media: neutral (distilled water), basic (aqueous solution of ammonia), acidic (aqueous solution of propionic acid), and non-polar medium (xylene with stearic acid). The effect of suspension composition and attritor milling time on the sintering behaviour and ionic conductivity of GDC was studied. An attritor milling time of 3 to 6 hours was evaluated as the optimum milling time from the viewpoint of further sintering behaviour. Longer milling times resulted in nanometre-sized powders, whose sintering behaviour deteriorated due to powder agglomeration. The appearance of agglomerates in the non-polar medium was reduced. The ionic conductivity of the samples was evaluated by impedance spectroscopy and correlated with their microstructure.

Anglický abstrakt

Gadolinia-doped ceria (GDC) ceramics were prepared by mechanochemical synthesis of ceria and gadolinia (10mol.%) powders with subsequent uniaxial pressing and pressureless sintering. The mechanochemical synthesis was conducted in an attritor with different dispersion media: neutral (distilled water), basic (aqueous solution of ammonia), acidic (aqueous solution of propionic acid), and non-polar medium (xylene with stearic acid). The effect of suspension composition and attritor milling time on the sintering behaviour and ionic conductivity of GDC was studied. An attritor milling time of 3 to 6 hours was evaluated as the optimum milling time from the viewpoint of further sintering behaviour. Longer milling times resulted in nanometre-sized powders, whose sintering behaviour deteriorated due to powder agglomeration. The appearance of agglomerates in the non-polar medium was reduced. The ionic conductivity of the samples was evaluated by impedance spectroscopy and correlated with their microstructure.

Klíčová slova

Milling; Sintering; Ionic conductivity; Gadolinia-doped CeO2

Klíčová slova v angličtině

Milling; Sintering; Ionic conductivity; Gadolinia-doped CeO2

Autoři

MACA, K.; CIHLÁŘ, J.; ČÁSTKOVÁ, K.; ZMEŠKAL, O.; HADRABA, H.

Rok RIV

2011

Vydáno

16.04.2007

Nakladatel

Elsevier Science

Místo

THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND

ISSN

0955-2219

Periodikum

Journal of the European Ceramic Society

Svazek

27

Číslo

13-15

Stát

Spojené království Velké Británie a Severního Irska

Strany od

4345

Strany do

4348

Strany počet

4

Plný text v Digitální knihovně

http://hdl.handle.net/

BibTex

@article{BUT43990,
  author="Karel {Maca} and Jaroslav {Cihlář} and Klára {Částková} and Oldřich {Zmeškal} and Hynek {Hadraba}",
  title="Sintering of gadolinia-doped ceria prepared by mechanochemical synthesis",
  journal="Journal of the European Ceramic Society",
  year="2007",
  volume="27",
  number="13-15",
  pages="4345--4348",
  issn="0955-2219"
}