Concepedia

Publication | Closed Access

Porous Ceramics Derived from Wood

DOI

15

Citations

0

References

2001

Year

Ulrich Vogt, A. Herzog, Thomas Graule, Raoul Klingner, Tanja Zimmermann
Key engineering materials

Abstract

Beech and pine were pyrolysed at different temperatures in natural state and after Si0<sub>2</sub>- sol infiltration. Correlation of weight change, porosity and density on pre-treatment were determined and optimised to obtain carbon templates with high porosity. The SiO<sub>2</sub>-infiltration was examined with the aim of a perfect fill-up of cell walls. The infiltration process was not influenced by the type of sol but showed a strong dependence from pyrolysis pre-treatment. The templates were transformed by a carbothermal reaction into SiC by preserving the high anisotropic porosity.