Slinování objemové ZrO2 keramiky

Sintering of bulk zirconia nanoceramics

článek v časopise - ostatní, Jost

en

The sintering and the microstructure of 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.

Bylo studováno slinování ZrO2 keramiky (dopované 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.

The sintering and the microstructure of 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.

zirconia, nanoceramics, sintering

2003

01.01.2003

Advanced Study Center Co. Ltd. (St.Petersburg, Russia)

1606-5131

Reviews on Advanced Materials Science

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