| 초록 |
Transparent ceramics have attracted noticeable attention as transparent material in harsher thermal and mechanical environments. In particular, yttria (Y2O3) ceramic is considered as the most promising optical materials for laser host materials and infrared-domes in future. However, commercial yttria has the larger average grain size than required in mid-wavelength IR (MWIR) region. To obtain fine grain size, many researchers have found that Y2O3-MgO composites offer enhanced microstructural stability and transparent properties because of grain-boundary pinning of MgO phase and lower coarsening rate during sintering. Furthermore, they tried to synthesize nanosized fine powder. In this study, we synthesized nanosized Y2O3-MgO nanoparticles through Glycine Nitrate Process (GNP), diethanolamine (DEA) and esterification sol-gel (ESG) synthesis. In addition, we conducted various sintering methods such as air condition, vacuum in high temperature furnace and spark plasma sintering (SPS). This work shows that the optimal synthesis methods and sintering condition of Y2O3-MgO nanocomposite ceramic and has a great potential to improve infrared transmittance |
