| 초록 |
The epsilon iron oxide (ε-Fe2O3) has remarkable advantages in spectroscopic absorption with highest resonance frequency due to its gigantic coercive field (＞ 20kOe) at room temperature. However, it is difficult to produce high purity epsilon phase since that only can be obtained under the specific conditions such as nanometer sized particle and narrow annealing temperature. Thus, researchers have tried various synthesis methods to obtain ε-Fe2O3 nanoparticles such as reverse-micelle & sol-gel method and templating method, which have multiple steps and low yield. In this study, we have developed a facile and scalable method to fabricate high purity ε-Fe2O3 via an aerosol approach. In addition, the magnetic properties were controlled by replacing some Fe3+ ions with various non-magnetic elements such as Ga and Y. Thus, our strategy would pave the way for the practical application of ε-Fe2O3 as the electromagnetic wave absorber. |
