Porous SiC Ceramics Derived from Tailored Wood‐Based Fiberboards

Abstract

Specific modification of properties such as porosity and pore size of engineered wood‐based source material enables the custom design of porous wood‐derived SiC that is produced by carbothermal reduction between the carbonized wood‐based material and an infiltrated silica sol. In contrast to bulk wood, the anisotropic shrinkage of the source material is less distinctive and can be controlled. Furthermore, the obtained structural properties of the material are isotropic. Material processing and properties of the wood‐derived ceramic material are described in this paper.

Porosity control of porous silicon carbide ceramics

“…[1][2][3][4][5][6][7][8][9] Different processing routes for porous SiC ceramics have been developed for specific applications in order to satisfy the associated requirements of porosity, pore size, and degree of interconnectivity. [10][11][12][13][14][15] These manufacturing techniques are typically divided into three categories: replica techniques, sacrificial template techniques and reaction techniques. The replica method is based on the impregnation or coating of a cellular structure with a SiC suspension or precursor solution to produce a porous SiC ceramic with the same morphology as the original cellular structure.…”

Influence of submicron SiC particle addition on porosity and flexural strength of porous self-bonded silicon carbide

“…Porous SiC ceramics can be produced mainly by replica, direct foaming, sacrificial template, and reaction sintering methods [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Among reaction sintered ceramics, selfbonded SiC (SBSC) is one of the promising candidates for hot-gas filter applications in which high refractoriness, good heat resistance and cost-effectiveness are required.…”

Carbonization of hot-pressed ARBOFORM ®-mixtures

“…by Shafizadeh and Chin (1977), Byrne and Nagle (1997), Kaindl (2000), Sieber et al (2000), Siegel et al (2004a), Siegel et al (2004b), Treusch (2004), Hoffmann (2005), Herzog et al (2006) and Krischok et al (2006).…”

“…Herzog et al 2006). Such wood based panels are more homogenous and characterized by an isotropic shrinkage during carbonization causing more uniform material properties too.…”