Publication result detail

Osmotic drying of gelcast bodies in liquid desiccant

TRUNEC, M.

Original Title

Osmotic drying of gelcast bodies in liquid desiccant

English Title

Osmotic drying of gelcast bodies in liquid desiccant

Type

WoS Article

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.

English 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

Key words in English

Al2O3; PEG; Gelcasting; Drying; Osmotic

Authors

TRUNEC, M.

RIV year

2012

Released

01.11.2011

Publisher

Elsevier Science

Location

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

ISBN

0955-2219

Periodical

Journal of the European Ceramic Society

Volume

31

Number

14

State

United Kingdom of Great Britain and Northern Ireland

Pages from

2519

Pages to

2524

Pages count

6

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"
}