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A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength - EurekAlert

Porous ceramics usually requires high mechanical strength and maximized porosity simultaneously, while for conventional particle grading strategy it is highly challenging to meet both demands. To this end, a reverse particle grading strategy was developed based on the linear packing model by unusually introducing coarse particles (d50 = 16 μm) into fine particles (d50 = 5 μm) matrix. Followed by the extrusion and sintering process, tubular porous SiC ceramic supports with improved mechanical strength were successfully fabricated. Effects of coarse particles on the rheology properties of the ceramic paste, and macroscopic properties and microstructure of SiC supports were systematically investigated.

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