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PRAJZLER, V. PRŮŠA, S. MACA, K.
Original Title
Rapid pressure-less sintering of fine grained zirconia ceramics: Explanation and elimination of a core-shell structure
Type
journal article in Web of Science
Language
English
Original Abstract
Rapid pressure-less sintering of nanoparticle yttria-stabilized zirconia (YSZ) can result in the formation of a gradient structure characterized by an airtight layer at the surface and interconnected porosity inside the sintered compact. This structure constrains a sample from further shrinkage and limits its final density. In this study, we rapidly sintered green bodies prepared from four commercially available YSZ powder grades, all with a particle size of 60 nm, but with different chemical compositions. We have shown that all powders contained residual chlorine which is responsible for the above mentioned core-shell structure of rapidly sintered samples rather than low thermal conductivity of zirconia. The only sample without this gradient structure was prepared from the powder grade with an increased amount of binder that helped to reduce the chlorine content during binder burnout. The ultimate way for elimination of negative chlorine effect was annealing the sample at 1000 °C prior to rapid sintering.
Keywords
Zirconia Rapid sintering Core-shell structure Residual chlorine
Authors
PRAJZLER, V.; PRŮŠA, S.; MACA, K.
Released
1. 12. 2019
ISBN
0955-2219
Periodical
Journal of the European Ceramic Society
Year of study
39
Number
16
State
United Kingdom of Great Britain and Northern Ireland
Pages from
5309
Pages to
5319
Pages count
11
URL
https://www.sciencedirect.com/science/article/pii/S0955221919305400
BibTex
@article{BUT159299, author="Vladimír {Prajzler} and Stanislav {Průša} and Karel {Maca}", title="Rapid pressure-less sintering of fine grained zirconia ceramics: Explanation and elimination of a core-shell structure", journal="Journal of the European Ceramic Society", year="2019", volume="39", number="16", pages="5309--5319", doi="10.1016/j.jeurceramsoc.2019.07.053", issn="0955-2219", url="https://www.sciencedirect.com/science/article/pii/S0955221919305400" }