Preparation and properties of highly porous, biomorphic YSZ ceramics

Highly porous, biomorphic YSZ (yttria-stabilized zirconia) ceramics were manufactured by infiltration of zirconium-oxychloride (ZrOCl 2·8H 2O) sol into biological template structures derived from rattan and pine wood. 3–5 mol% yttrium nitrate (Y(NO 3) 3·5H 2O) was added to the sol to stabilize the t...

Full description

Saved in:
Bibliographic Details
Published in:Materials chemistry and physics 2004-10, Vol.87 (2), p.345-352
Main Authors: Rambo, C.R., Cao, J., Sieber, H.
Format: Article
Language:English
Subjects:
Biomorphous ceramics
Biotemplating
Porous ceramics
Sol–gel processing
YSZ
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Highly porous, biomorphic YSZ (yttria-stabilized zirconia) ceramics were manufactured by infiltration of zirconium-oxychloride (ZrOCl 2·8H 2O) sol into biological template structures derived from rattan and pine wood. 3–5 mol% yttrium nitrate (Y(NO 3) 3·5H 2O) was added to the sol to stabilize the tetragonal ZrO 2 phase. After vacuum-assisted infiltration, the specimens were pyrolysed at 800 °C in N 2 atmosphere. Repeated infiltrations and subsequent annealing in air at temperatures up to 1550 °C yields the burn out of the biocarbon template and resulted in the formation of biomorphous YSZ ceramics, which maintained the microstructural features of the biological preform. Depending on the type of the biological template as well as the processing parameters, biomorphic ZrO 2 ceramics with an unidirected pore morphology and a large variety of microstructures can be obtained.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2004.05.031