Detail publikace

Sintering of gadolinia-doped ceria prepared by mechanochemical synthesis

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

Anglický název

Sintering of gadolinia-doped ceria prepared by mechanochemical synthesis

Typ

Článek WoS

Jazyk

en

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.

Klíčová slova anglicky

Milling; Sintering; Ionic conductivity; Gadolinia-doped CeO2

Vydáno

2007-04-16

Nakladatel

Elsevier Science

Místo

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

ISSN

0955-2219

Časopis

Journal of the European Ceramic Society

Ročník

27

Číslo

13-15

Strany od–do

4345–4348

Počet stran

4

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"
}