Publication detail

Sintering of alumina and zirconia nanoceramics

DOBŠÁK, P. MACA, K. TRUNEC, M.

Czech title

Slinování Al2O3 a ZrO2 nanokeramiky

English title

Sintering of alumina and zirconia nanoceramics

Type

conference paper

Language

en

Original abstract

The sintering and the microstructure of alumina and zirconia ceramics prepared by cold isostatic pressing of nanoceramic powders were studied. Ceramic powders contained 0, 1.5 and 3 mol.% of yttria. It was found that higher compacting pressures (700 MPa) yielded green bodies with smaller pores, which showed in their better sinterability. After sintering at 1100C, the bodies had a density exceeding 90% t.d. and grains below 80 nm. A critical ratio of the pore size in green bodies to the particle size was established, which enables sintering zirconia nanopowders of some 10 nm in size at a temperature of 1100C.

Czech abstract

Bylo studováno slinování ZrO2 keramiky (dopované 0, 1,5 a 3mol.% Y2O3) připravené izostatickým lisováním nanometrických prášků. Vyšší lisovací tlak (700MPa) vedl ke keramickým polotovarům s menší velikostí pórů, které lépe slinovaly než tělesa lisovaná nižším tlakem (300MPa). Po slinování při 1100C měla tělesa hustotu vyšší než 99%t.h. a zrna menší než 80nm. Byl stanoven kritický poměr velikosti pórů a velikosti částic v keramickém polotovaru, který určuje která tělesa z prášku o velikosti 10nm budou slinovat při tepllotě 1100C.

English abstract

The sintering and the microstructure of alumina and zirconia ceramics prepared by cold isostatic pressing of nanoceramic powders were studied. Ceramic powders contained 0, 1.5 and 3 mol.% of yttria. It was found that higher compacting pressures (700 MPa) yielded green bodies with smaller pores, which showed in their better sinterability. After sintering at 1100C, the bodies had a density exceeding 90% t.d. and grains below 80 nm. A critical ratio of the pore size in green bodies to the particle size was established, which enables sintering zirconia nanopowders of some 10 nm in size at a temperature of 1100C.

Keywords in English

alumina,zirconia,nanoceramics, sintering

RIV year

2003

Released

01.01.2003

Publisher

Faculty of Technology, University of Novi Sad

Location

Novi Sad

ISBN

86-80995-46-0

Book

School of Ceramics, V Students' meeting

Pages count

2

BIBTEX


@inproceedings{BUT11052,
  author="Petr {Dobšák} and Karel {Maca} and Martin {Trunec},
  title="Sintering of alumina and zirconia nanoceramics",
  booktitle="School of Ceramics, V Students' meeting",
  year="2003",
  month="January",
  publisher="Faculty of Technology, University of Novi Sad",
  address="Novi Sad",
  isbn="86-80995-46-0"
}