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Design, fabrication, microstructure, and properties of highly porous alumina whisker foam ceramic
- Source :
- Ceramics International. 48:2776-2781
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- In this study, a new type of highly porous ceramic was successfully fabricated from α-Al2O3 whiskers and nano-sized Al2O3 particle slurry by vacuum infiltration with the subsequent annealing in air. It was found that with an increase in the alumina slurry amount or sintering temperature, the porosity of the foam ceramic decreased while its compressive strength increased. The optimal alumina slurry content and sintering temperature were equal to 4 g, and 1350 °C, respectively. The as-synthesised porous foam ceramic exhibited a low density of 0.65 g/cm3, high porosity of 83.51%, high compressive strength of 3.84 MPa, and low thermal conductivity of 1.37 W/m⋅K at room temperature, suggesting its potential applications in high-temperature gas filtration and thermal insulation materials.
- Subjects :
- Materials science
business.industry
Process Chemistry and Technology
Sintering
Microstructure
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Compressive strength
Whisker
Thermal insulation
visual_art
Materials Chemistry
Ceramics and Composites
visual_art.visual_art_medium
Slurry
Ceramic
Composite material
Porosity
business
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........e4a2bcf3b5c9adbe67918667ac65d110