Effect of double sintering on the properties of porous ceramic
This present work reports the fabrication of porous ceramic through thermal treatment of powder mixture of alumina and starch. The effects of double sintering on the properties of porous ceramic were investigated. The mixture was milled and then the dried powder below 63 m was sintered in powder fo...
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| Main Authors: | , |
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| Format: | Conference or Workshop Item |
| Published: |
2008
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/587/ http://eprints.uthm.edu.my/587/1/Effects_of_Double_Sintering_on_The_Properties_of_Porous_Ceramic.pdf |
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| Summary: | This present work reports the fabrication of porous ceramic through thermal treatment of
powder mixture of alumina and starch. The effects of double sintering on the properties of
porous ceramic were investigated. The mixture was milled and then the dried powder below
63 m was sintered in powder form at 1100°C, 1200°C, 1300°C, 1400°C and 1500°C.
Meanwhile, the second stage sintering at 1500°C was implemented after powder pressing.
All sintering process was carried out for 2 hours. The mechanical and physical properties
such as porosity, density, modulus of rupture and hardness have been analyzed. The
modulus of rupture has risen up to 14.704MPa which has successfully improved it about five
times higher compared to the strength for single sintered sample. Besides that, the hardness
value for double sintered porous ceramic could be increased until 35.90HV. The results have
proven that double sintering process able to improve the density, hardness and strength of
porous ceramic significantly. These ceramic bodies may have a potential use in a wide range
of applications due to an excellent combination of properties. |
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