Processing and properties of polysiloxane-derived porous silicon carbide ceramics using hollow microspheres as templates

Ceramic microparticles and capsules via microfluidic processing of a preceramic polymer

“…Therefore, they can be subjected to a large variety of different forming methods, some of them unique or at least much more easily exploitable for polymers than ceramic powders or pastes. These include casting (Melcher et al 2003), infiltration (Satoa et al 1999), pressing (Galusek et al 2007), injection moulding (Walter et al 1996), extrusion (Eom & Kim 2007;Eom et al 2008), machining (Rocha et al 2005), fibre drawing (Okamura et al 2006), blowing/ foaming (Colombo 2008), ink jetting (Mott & Evans 2001), rapid prototyping (Friedel et al 2005), electrohydrodynamic spraying/spinning ), aerosol spraying (Bahloul-Hourlier et al 2001, self-assembly (Malenfant et al 2007) and microcomponent processing such as UV/X-ray lithography, nano/micro-casting, replication, micro-extrusion and embossing/forging (Schulz 2009). …”

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.…”

Preparation processes and characterizations of alumina-coated alumina support layers and alumina-coated natural material-based support layers for microfiltration

“…The average pore size of the alumina support layer is 1.10 mm; however, we see the average pore size of the alumina coating layers increased from 0.10 mm to 0.18 mm as the heat treatment temperature is increased. Generally, for dense ceramics, the average pore size decreases as the sintering temperature increases; however, the experimental results on porous ceramics, such as diatomite, [12] silicon carbide, [30,31] alumina, [32] corundum-mullite, [33] and zirconia [34], at different temperatures ranges shows that the average pore size of these materials either increases or does not change significantly with increasing sintering temperature. Although this is generally explained as a result of pore coarsening [32] or densification [31] and although processing routes for the production of porous ceramics have been extensively documented in literature, a relationship between average pore size and sintering temperature has yet to be established.…”