Publication detail
Compaction and sintering of bulk zirconia and ceria nanoceramics
TRUNEC, M. MACA, K. DOBŠÁK, P.
Czech title
Zhutňování a slinování objemové ZrO2 a CeO2 nanokeramiky
English title
Compaction and sintering of bulk zirconia and ceria nanoceramics
Type
conference paper
Language
en
Original abstract
Shaping and sintering of bulk nanoceramic bodies were investigated. The results have shown that both shaping techniques, cold isostatic pressing and centrifugation, can be used to prepare almost fully dense (~99% of theoretical density) ceramic bodies provided the nanopowders are only weakly agglomerated and/or are properly dispersed through colloidal processing. Samples sintered at a temperature of 1500 degC did not display any nanocrystalline feature, the grain size ranged from 300 to 400 nm. Relative densities of 95.2% t.d. and 97.9% t.d. were achieved for selected ZrO2 bodies sintered at a temperature of 1100 degC for 4 hours and 1200 degC for 1 hour, respectively. At this temperature a nanocrystalline structure in sintered bodies was retained. The average grain size was 53 and 62 nm for a body sintered at 1100 degC and 1200 degC, respectively.
Czech abstract
Bylo zkoumáno tvarování a slinování objemových nanokeramických těles. Výsledky ukázaly, že obě tvarovací techniky, isostatické lisování za studena a odstřeďování, mohly být použity pro přípravu téměř hutných (~99% teoretické hustoty) keramických těles, pokud nanoprášky byly pouze slabě aglomerované a/nebo byly vhodně dispergovány koloidními postupy. Vzorky slinované při 1500 degC neměly nanokrystalickou strukturu, velikost zrn se pohybovala od 300 do 400 nm. Relativní hustota 95,2% t.h. a 97,9% t.h. byla dosažena u vybraných ZrO2 těles slinovaných při 1100 degC po dobu 4 h a při 1200 degC po dobu 1 h. Při této slinovací teplotě byla nanokrystalická struktura zachována. Průměrná velikost zrn byla 53 a 62 nm pro tělesa slinovaná při 1100, resp. 1200 degC.
English abstract
Shaping and sintering of bulk nanoceramic bodies were investigated. The results have shown that both shaping techniques, cold isostatic pressing and centrifugation, can be used to prepare almost fully dense (~99% of theoretical density) ceramic bodies provided the nanopowders are only weakly agglomerated and/or are properly dispersed through colloidal processing. Samples sintered at a temperature of 1500 degC did not display any nanocrystalline feature, the grain size ranged from 300 to 400 nm. Relative densities of 95.2% t.d. and 97.9% t.d. were achieved for selected ZrO2 bodies sintered at a temperature of 1100 degC for 4 hours and 1200 degC for 1 hour, respectively. At this temperature a nanocrystalline structure in sintered bodies was retained. The average grain size was 53 and 62 nm for a body sintered at 1100 degC and 1200 degC, respectively.
Keywords in English
compaction, sintering, nanoceramics
RIV year
2003
Released
01.01.2003
Publisher
International Community for Composuites Engineering
Location
New Orleans
Book
Tenth annual international conference on composites/nano engineering
Edition number
1
Pages count
2
BIBTEX
@inproceedings{BUT13311,
author="Martin {Trunec} and Karel {Maca} and Petr {Dobšák},
title="Compaction and sintering of bulk zirconia and ceria nanoceramics",
booktitle="Tenth annual international conference on composites/nano engineering",
year="2003",
month="January",
publisher="International Community for Composuites Engineering",
address="New Orleans"
}