| Autor: |
Chen, Xi Rong, Chen, Zao Ming, Hu, De Yuan |
| Zdroj: |
Advanced Materials Research; November 2011, Vol. 399 Issue: 1 p577-580, 4p |
| Abstrakt: |
Nanometer ferric oxide (α-Fe2O3) powders were prepared by improved hydrolysis method from industrial byproduct ferrous sulfate septihydrate (FeSO4•7H2O) and industrial grade ammonium bicarbonate (NH4HCO3). The structural properties were characterized by X-ray diffraction (XRD), scanning electron microscopy(SEM), transmission electron microscopy (TEM), difference of thermodynamic analysis (DTA). The results revealed that the phase of ferric oxide powders mainly consisted of spherical α-Fe2O3. The α-Fe2O3 particles were relatively uniform in size and the average size of particles is 40nm. The effects of many technical factors on growing and properties of nanometer ferric oxide particles, such as the reaction time and temperature, pH value of system, calcined temperature etc were discussed in this paper. |
| Databáze: |
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