Effect of temperature and composition of palm oil fuel ash on compressive strength of porcelain
The treated palm oil fuel ash (POFA) is used as a substitute material in producing an improved porcelain ceramics. Most of the POFA is posed as waste in landfills, causing environmental and other problems. The POFA is grounded in a ball mill until the particle size is reduced to about 50 μm. Then it...
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| Main Authors: | , , |
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| Format: | Article |
| Published: |
Trans Tech Publications Inc
2014
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.4028/www.scientific.net/AMM.660.173 http://dx.doi.org/10.4028/www.scientific.net/AMM.660.173 http://eprints.uthm.edu.my/6391/1/Effect_of_Temperature_and_Composition_of_Palm_Oil_Fuel_Ash_on.pdf |
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| Summary: | The treated palm oil fuel ash (POFA) is used as a substitute material in producing an
improved porcelain ceramics. Most of the POFA is posed as waste in landfills, causing
environmental and other problems. The POFA is grounded in a ball mill until the particle size is
reduced to about 50 μm. Then it is heated at a temperature of 600 ºC for 1.5 h in an electric furnace.
About 5 wt% to 25 wt% of POFA is used to substitute quartz in porcelain composition. The mixed
powder is then pressed into pellets at pressure of 91 MPa. All the pellets are sintered at a
temperature of 1000 ºC, 1100 ºC, 1200 ºC and 1280 ºC for 2.0 h soaking times. It is found that the
highest compressive strength, 46 MPa is obtained at 15 wt% of POFA and sintered at 1100 ºC. The
improvement in the properties could be attributed to the changes in the microstructural features as a
result of an increase in mullite and cristobalite simultaneously. |
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