Table 3 Variation of thermal conductivity enhancement (%) as function of temperature at various ultrasonication times
Concentration (wt.%) | Temperature (°C) | Sonication timesa(min) | |||||
|---|---|---|---|---|---|---|---|
2 | 7 | 10 | 20 | 30 | 40 | ||
0.5 | 20 | 0.67 | 2.02 | 2.86 | 3.54 | 3.87 | 4.38 |
25 | 0.66 | 1.82 | 2.65 | 3.48 | 4.14 | 4.80 | |
30 | 0.65 | 1.95 | 2.76 | 4.55 | 5.20 | 6.02 | |
35 | 0.80 | 2.24 | 3.21 | 5.45 | 6.89 | 7.85 | |
40 | 1.27 | 4.46 | 7.64 | 10.67 | 12.10 | 13.38 | |
45 | 2.37 | 7.59 | 13.13 | 17.72 | 20.41 | 22.31 | |