Preparation of Rare-Earth Doped Zirconia Nanoparticles via Supercritical Hydrothermal Method for Luminescence Properties
| Periodical | Key Engineering Materials (Volumes 512 - 515) |
|---|---|
| Main Theme | High-Performance Ceramics VII |
| Edited by | Wei Pan and Jianghong Gong |
| Pages | 59-64 |
| DOI | 10.4028/www.scientific.net/KEM.512-515.59 |
| Citation | Yukiya Hakuta et al., 2012, Key Engineering Materials, 512-515, 59 |
| Online since | June, 2012 |
| Authors | Yukiya Hakuta, Kiwamu Sue, Yoshihiro Takebayashi, Satoshi Yoda, Takeshi Furuya, Hiroshi Takashima |
| Keywords | Electroluminescence, Hydrothermal Synthesis, Photoluminescence (PL), Rare Earth Doped Zirconia, Supercritical Water |
| Price | US$ 28,- |
We report preparation of Tb3+ or Eu3+ doped zirconia nanoparticles by sub- and supercritical hydrothermal reaction and luminescence properties. Experiments were performed by a flow-type hydrothermal reaction system. We investigated the effect of the reaction temperature on crystal structure, particle size and photo-, electro-luminescence properties. Reaction temperature was varied in the ranges of 150 to 400 C and reaction pressure was fixed to 30MPa. Characteristics of the products were performed by XRD, TEM, SEM-EDS and PL, EL measurements. The product transformed from amorphous zirconium hydroxide to tetragonal ZrO2 with an increase in the reaction temperature, regardless of the doped ion species. The ZrO2:Eu particles obtained at 400C were spherical with around 5 nm in diameter. ZrO2:Eu nanoparticles obtained under supercritical water condision showed typical photoluminescence spectra of f-f transition of Eu3+; however ZrO2:Tb nanoparticle obtained under the same condition showed no photoluminescence. Furthermore, the ZrO2:Eu nanoparticles obtained at 400 C showed high electroluminescence properties at electric field of 350V and 1kHz.
