Publication detail

Osmotic drying of gelcast bodies in liquid desiccant

TRUNEC, M.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

Osmotic drying of gelcast alumina bodies was carried out in water solutions of various polyethylene glycols (PEGs) with molecular weight ranging from 1000 to 80000 g/mol. Up to 30 % of the water content could be removed from the gelcast bodies immersed in a 43 wt% solution of PEG 80000. It was found that PEG 1000 was a less effective desiccant than the PEGs with higher molecular weights, even if the osmotic pressure was similar (4.9 MPa). The smaller PEG molecules penetrated the gelled bodies and reduced the dewatering. Moreover, the penetrated PEG molecules affected the pore structure of green bodies and in this way influenced the sintering behaviour. The time dependence of dewatering and the effect of the size of gelcast bodies were investigated and correlated with the green body structure and sintering behaviour in order to optimize the osmotic drying process.

Keywords

Al2O3; PEG; Gelcasting; Drying; Osmotic

Authors

TRUNEC, M.

RIV year

2011

Released

1. 11. 2011

Publisher

Elsevier Science

Location

THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND

ISBN

0955-2219

Periodical

Journal of the European Ceramic Society

Year of study

Number

State

United Kingdom of Great Britain and Northern Ireland

Pages from

2519

Pages to

2524

Pages count

BibTex

@article{BUT88508,
  author="Martin {Trunec}",
  title="Osmotic drying of gelcast bodies in liquid desiccant",
  journal="Journal of the European Ceramic Society",
  year="2011",
  volume="31",
  number="14",
  pages="2519--2524",
  issn="0955-2219"
}