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3D printing boehmite gel foams into lightweight porous ceramics with hierarchical pore structure
- Source :
- Journal of the European Ceramic Society. 40:930-934
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- We herein report a novel hierarchically porous ceramic foams derived from boehmite gel foams, which possess both high porosity and superior strength. The gel foams show excellent printability due to its predominant stability, high yield stress and storage modulus, which endows such foam material ideal ink for 3D printing lightweight and complex-shape materials via direct ink writing approach. The 3D printed ceramic foams possess programmable architecture assembled by porous filaments, uniform macro-pores with tunable size in the range of 4∼70 μm, as well as nanoscale pores in cell wall, after sintering at relatively low temperature of 1200–1300 °C. In this way, ceramic foams with high strength were achieved, attributed to the tiny grains, large amount of grain boundaries, uniform pores and hierarchical pore structure. Notably, the foams sintered below 1200 °C have significant advantage on specific surface area, which could reach up to 300-400 m2/g.
- Subjects :
- 010302 applied physics
Boehmite
Materials science
Sintering
02 engineering and technology
Dynamic mechanical analysis
021001 nanoscience & nanotechnology
01 natural sciences
Specific surface area
visual_art
0103 physical sciences
Materials Chemistry
Ceramics and Composites
visual_art.visual_art_medium
Grain boundary
Ceramic
Composite material
0210 nano-technology
Porosity
Nanoscopic scale
Subjects
Details
- ISSN :
- 09552219
- Volume :
- 40
- Database :
- OpenAIRE
- Journal :
- Journal of the European Ceramic Society
- Accession number :
- edsair.doi...........c0ae81dbce99872b3ac23fa7a4a5ac5d
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2019.10.032