Detail publikace

Rapid pressure-less sintering of fine grained zirconia ceramics: Explanation and elimination of a core-shell structure

PRAJZLER, V. PRŮŠA, S. MACA, K.

Originální název

Rapid pressure-less sintering of fine grained zirconia ceramics: Explanation and elimination of a core-shell structure

Anglický název

Rapid pressure-less sintering of fine grained zirconia ceramics: Explanation and elimination of a core-shell structure

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

Dokumenty

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",
  annote="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.",
  chapter="159299",
  doi="10.1016/j.jeurceramsoc.2019.07.053",
  howpublished="print",
  number="16",
  volume="39",
  year="2019",
  month="december",
  pages="5309--5319",
  type="journal article in Web of Science"
}