Publication detail

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

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

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

Flash sintering; Zirconia; Densification; Shell-like structure

Authors

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

Released

1. 9. 2024

Publisher

ELSEVIER SCI LTD

Location

London

ISBN

1873-619X

Periodical

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

Year of study

44

Number

11

State

United Kingdom of Great Britain and Northern Ireland

Pages from

6660

Pages to

6667

Pages count

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="1873-619X",
  url="https://www.sciencedirect.com/science/article/pii/S0955221924003236?via%3Dihub"
}