Table 4 Experimental values of silica yield.
Std | Combustion temperature (℃) | Combustion time (Hour) | Digestion time (Hour) | Yield (%) |
|---|---|---|---|---|
1 | 500 | 2 | 1 | 27 |
2 | 800 | 2 | 1 | 77 |
3 | 500 | 4 | 1 | 42 |
4 | 800 | 4 | 1 | 83 |
5 | 500 | 2 | 3 | 39 |
6 | 800 | 2 | 3 | 82 |
7 | 500 | 4 | 3 | 52 |
8 | 800 | 4 | 3 | 85 |
9 | 425 | 3 | 2 | 23 |
10 | 875 | 3 | 2 | 83 |
11 | 650 | 1.5 | 2 | 70 |
12 | 650 | 4.5 | 2 | 82 |
13 | 650 | 3 | 0.5 | 61 |
14 | 650 | 3 | 3.5 | 73 |
15 | 650 | 3 | 2 | 75 |
16 | 650 | 3 | 2 | 76.5 |
17 | 650 | 3 | 2 | 77.5 |
18 | 650 | 3 | 2 | 78 |
19 | 650 | 3 | 2 | 76 |
20 | 650 | 3 | 2 | 76.5 |
