Journal
RSC ADVANCES
Volume 5, Issue 35, Pages 27891-27900Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra00766f
Keywords
-
Categories
Funding
- Swedish Research Council (VR)
- Swedish Governmental Agency for Innovation Systems (VINNOVA) through the Berzelii Center EXSELENT on Porous Materials
- Ministry of Science and Technology of the P. R. China through Sinosteel Corporation Luoyang Institute of Refractories Research
- European Commission through the Marie-Curie ITN project Functional Nitrides for Energy Applications, FUNEA [FP7-PITN-GA-2010-264873]
Ask authors/readers for more resources
Rigid SiC-Si3N4 foams with hierarchical porosity were prepared through protein-based gel-casting followed by radiant sintering in a modified spark plasma sintering (SPS) set-up. The porous bodies sintered at 1500-1700 degrees C for only 10 minutes achieved a compressive strength of 15-21 MPa while keeping a porosity of 60-70 vol%. Gradient porous structures, with pore sizes ranging between 1 to 100 mm, were intersected by the growth of hybrid SiC and Si3N4 nanowires inside the pores resulting in a nasal cavity-like appearance. Gas permeability at room temperature (25 degrees C) and 600 degrees C was evaluated. Darcian permeabilities and non-Darcian permeabilities of all the prepared foams at room temperature fell within (0.354-1.55) x 10(-12) m(2) and (1.60-6.33) x 10(-8) m, respectively. Measurement of the Darcian and non-Darcian permeabilities at 600 degrees C were much higher, at 1.71 x 10(-11) m(2) and 2.68 x 10(-7) m, respectively. The microstructure, stability, gas flow properties and the green synthesis route reveal the potential of these ceramic foams to be used as industrial PM filters for airborne pollutions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available