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Table 2 Variation of oxide composition with milling hours

From: Preparation and Characterization of Nano structured Materials from Fly Ash: A Waste from Thermal Power Stations, by High Energy Ball Milling

Milling hours Al2O3(%) SiO2(%) CaO (%) TiO2(%) Fe2O3(%)
0 32.16 59.23 0.99 2.59 5.03
20 29.13 62.63 1.31 2.54 4.39
40 27.35 63.59 1.28 2.13 5.65
50 28.55 63.14 0.83 1.85 5.63
60 27.8 62.82 1.32 1.99 6.06