Detail publikačního výsledku

Residual chlorine prevents full densification of flash sintered yttria-stabilized zirconia ceramics

PRAJZLER, V.; MACA, K.; TODD, R.

Originální název

Residual chlorine prevents full densification of flash sintered yttria-stabilized zirconia ceramics

Anglický název

Residual chlorine prevents full densification of flash sintered yttria-stabilized zirconia ceramics

Druh

Článek WoS

Originální abstrakt

The densification of yttria-stabilized zirconia (YSZ) during flash sintering is strongly dependent on the amount of residual chlorine in the sintered bodies. The residual chlorine, present as a remnant from powder synthesis, hinders densification after it is trapped and vaporized in the rapidly closing pores, limiting the final density at around 87 - 93% of theoretical. We show that this phenomenon is likely to affect all YSZ powders synthesized from chloride precursors unless the residual chlorine is reduced to <= 0.03 wt% before the onset of the flash sintering. This can be universally achieved by thermal purification of green bodies at a high temperature or by chemical purification in ammonium hydroxide. Furthermore, added binder in commercially available Tosoh zirconia TZ-powders (TZ-3YB, TZ-3YB-E) helps to significantly reduce chlorine content during binder burnout which in turn allows flash sintering into a high density even without green body purification.

Anglický abstrakt

The densification of yttria-stabilized zirconia (YSZ) during flash sintering is strongly dependent on the amount of residual chlorine in the sintered bodies. The residual chlorine, present as a remnant from powder synthesis, hinders densification after it is trapped and vaporized in the rapidly closing pores, limiting the final density at around 87 - 93% of theoretical. We show that this phenomenon is likely to affect all YSZ powders synthesized from chloride precursors unless the residual chlorine is reduced to <= 0.03 wt% before the onset of the flash sintering. This can be universally achieved by thermal purification of green bodies at a high temperature or by chemical purification in ammonium hydroxide. Furthermore, added binder in commercially available Tosoh zirconia TZ-powders (TZ-3YB, TZ-3YB-E) helps to significantly reduce chlorine content during binder burnout which in turn allows flash sintering into a high density even without green body purification.

Klíčová slova

Flash sintering; Zirconia; Densification; Shell-like structure

Klíčová slova v angličtině

Flash sintering; Zirconia; Densification; Shell-like structure

Autoři

PRAJZLER, V.; MACA, K.; TODD, R.

Rok RIV

2025

Vydáno

01.09.2024

Nakladatel

ELSEVIER SCI LTD

Místo

London

ISSN

1873-619X

Periodikum

Journal of the European Ceramic Society

Svazek

44

Číslo

11

Stát

Spojené království Velké Británie a Severního Irska

Strany od

6660

Strany do

6667

Strany počet

8

URL

https://www.sciencedirect.com/science/article/pii/S0955221924003236?via%3Dihub

BibTex

@article{BUT189993,
  author="Vladimír {Prajzler} and Karel {Maca} and Richard I. {Todd}",
  title="Residual chlorine prevents full densification of flash sintered yttria-stabilized zirconia ceramics",
  journal="Journal of the European Ceramic Society",
  year="2024",
  volume="44",
  number="11",
  pages="6660--6667",
  doi="10.1016/j.jeurceramsoc.2024.04.017",
  issn="0955-2219",
  url="https://www.sciencedirect.com/science/article/pii/S0955221924003236?via%3Dihub"
}