Table 3.
Magnetite synthesis variables via thermal decomposition.
| Variables of Influence | Solvent + Surfactant | Temp. (°C) | Time (h) | Particle Size (nm) | Saturation Magnetisation (emu/g) | Size Distribution |
|---|---|---|---|---|---|---|
| Reaction temperature | BET + OM | 220 | 2 | 3 | 46 | Small |
| PET + OM | 265 | 5 | 51 | Small | ||
| BET + OM | 300 | 9 | 60 | Relatively large | ||
| ODE + OM | 330 | 24 | 74 | Large | ||
| Reaction time and surfactant | BET + OM | 300 | 0.5 | 7 | 57 | Relatively small |
| 4 | 12 | 65 | Very large | |||
| BET + OM + OA | 0.5 | 6 | - | Very small | ||
| 4 | 14 | 67 | Very small | |||
| Absence of solvent | OM | 300 | 0.5 | 8 | - | Small |
| 4 | 10 | 58 | Relatively small | |||
| OM + OA | 0.5 | 5 | - | Muito Small | ||
| 2 | 6 | 58 | Small | |||
| 24 | 11 | 71 | Small | |||
| 330 | 0.5 | 7 | - | Relatively small | ||
| 4 | 10 | 76 | Relatively small |
OM—oleylamine; OA—oleic acid; BET—dibenzyl ether; PET—diphenyl ether; ODE—1-octadecene.