Selective formation of spinel iron oxide in thin films by complexing agent-assisted sol-gel processing
Kojima, K; Miyazaki, M; Mizukami, F; Maeda, K
| HERO ID | 1962870 |
|---|---|
| In Press | No |
| Year | 1997 |
| Title | Selective formation of spinel iron oxide in thin films by complexing agent-assisted sol-gel processing |
| Authors | Kojima, K; Miyazaki, M; Mizukami, F; Maeda, K |
| Journal | Journal of Sol-Gel Science and Technology |
| Volume | 8 |
| Issue | 1-3 |
| Page Numbers | 77-81 |
| Abstract | The structure of iron oxide was controlled by regulating the hydrolytic polymerization of aquo iron complexes with organic polydentate ligands such as diols. Iron oxides were prepared by calcining the precursor polymers obtained from iron nitrate nonahydrate and diols. When the diols were 1,2-pentanediol, 1,2-hexanediol and 1,2-octanediol, alpha-Fe2O3 with corundum structure appeared exclusively or as the main crystalline phase, in spite of the amount of diol used and the calcination temperature. In the case of 1,2-decanediol and 1,2-dodecanediol, when five moles of the diols were used to one mole of iron nitrate and the calcination temperatures were below 400 degrees C, gamma-Fe2O3 with spinel structure appeared as the main phase and, when less than five moles of the diols were used, alpha-Fe2O3 appeared exclusively or as the main phase, irrespective of the calcination temperature. This tendency was also observed in thin films. Thus, a transparent magnetic film composed of gamma-Fe2O3 could be prepared by applying a benzene solution of the iron polymer, obtained with 5 equivalents of 1,2-decanediol, on quartz and calcining the gel him at 350 degrees C. |
| Doi | 10.1007/BF02436821 |
| Wosid | WOS:A1997WQ33400012 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | iron oxide; structural control; complexing agent; thin film; sol-gel |