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 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, 45 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.
Amir Khalid, Bukhari Manshoor, Erween Abdul Rahim, Waluyo Adi Siswanto and Kamil Abdullah
M. Z. Noh et al., "Effect of Temperature and Composition of Palm Oil Fuel Ash on Compressive Strength of Porcelain", Applied Mechanics and Materials, Vol. 660, pp. 173-177, 2014