A novel processing approach for free-standing porous non-oxide ceramic supports from polycarbosilane and polysilazane precursors. Issue 9 (September 2015)

• Record Type: Journal Article
• Authors: Konegger, Thomas; Patidar, Rajesh; Bordia, Rajendra K.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 9(2015:Sep.)
• Page Start: 2679
• Page End: 2683
• Publication Date: 2015-09
• Subjects: Polymer-derived ceramics -- Polycarbosilane -- Polysilazane -- Support -- Porosity; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2015.03.009
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: In this contribution, a low-pressure/low-temperature casting technique for the preparation of novel free-standing macrocellular polymer-derived ceramic support structures is presented. Preceramic polymers (polycarbosilane and poly(vinyl)silazane) are combined with sacrificial porogens (ultra-high molecular weight polyethylene microbeads) to yield porous ceramic materials in the SiC or SiCN systems, exhibiting well-defined pore structures after thermal conversion. The planar-disc-type specimens were found to exhibit biaxial flexural strengths of up to 60 MPa. In combination with their observed permeability characteristics, the prepared structures were found to be suitable for potential applications in filtration, catalysis, or membrane science.