Izostatické lisování za studena a slinování Al2O3 a ZrO2 nanokeramiky

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Cold isostatic pressing and sintering of alumina and zirconia nanoceramics

Popis výsledku v původním jazyce

The influence of particle size and compacting pressure on the microstructure and sinterability of ceramic green bodies were studied. Alumina and zirconia powders with particle size smaller than 35 nm were used and their behaviour was compared with submicrometre sized powders. The green bodies were prepared by cold isostatic pressing at 300, 700 and 1000 MPa. The open porosity of pressed samples was evaluated by mercury intrusion. Specimens were sintered in high temperature dilatometer. The microstructurre was examined using electron microscopy. In the case of zirconia ceramics the sintering temperature decreased with decreasing particle size and with increasing compacting pressure. Zirconia nanoceramics exhibited final microstructure with grain size below 80 nm and density exceeding 99 % of theoretical density after sintering at 1100°C. Alumina samples made of nanopowders showed poor sinterability probably due to high level of powder agglomeration.

Název v anglickém jazyce

Cold isostatic pressing and sintering of alumina and zirconia nanoceramics

Popis výsledku anglicky

The influence of particle size and compacting pressure on the microstructure and sinterability of ceramic green bodies were studied. Alumina and zirconia powders with particle size smaller than 35 nm were used and their behaviour was compared with submicrometre sized powders. The green bodies were prepared by cold isostatic pressing at 300, 700 and 1000 MPa. The open porosity of pressed samples was evaluated by mercury intrusion. Specimens were sintered in high temperature dilatometer. The microstructurre was examined using electron microscopy. In the case of zirconia ceramics the sintering temperature decreased with decreasing particle size and with increasing compacting pressure. Zirconia nanoceramics exhibited final microstructure with grain size below 80 nm and density exceeding 99 % of theoretical density after sintering at 1100°C. Alumina samples made of nanopowders showed poor sinterability probably due to high level of powder agglomeration.

Druh

D - Stať ve sborníku

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the International Conference NAN0 '04

ISBN

80-214-2793-0

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

91-96

Název nakladatele

VUTIUM

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

13. 10. 2004

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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