|About this Abstract
||Materials Science & Technology 2015
||Ceramic Optical Materials
||Laser Oscillation of Lu-based Oxide Ceramics by Spark Plasma Sintering
||Takashi Goto, Liqiong An, Akihiko Ito
|On-Site Speaker (Planned)
Transparent single crystals have wide-ranged applications such as scintillators and lasers. However, single crystal growth needs high temperature with a long time, and they are mechanically weak. Polycrystalline ceramics, on the other hand, could be more advantageous than single crystals because of less dopant segregation, high strength and low proceeding temperature. Spark plasma sintering (SPS) can consolidate many ceramics at a low temperature in a short time without significant grain growth. We have applied SPS to synthesize transparent ceramics by using commercially available powders. In order to obtain transparent ceramics, voids should be eliminated by optimizing a sintering procedure. We have employed a two-step profile and post-annealing, and prepared transparent Lu-based ceramics. Nd3+ 1 at% doped Lu2O3 ceramics by SPS has first exhibited laser oscillation. Transparent Lu3Al5O12 ceramics were first prepared by SPS, and new transparent Lu2Ti2O7, Lu3NbO7 and Lu2Hf2O7 ceramics were first synthesized.
||Planned: MS&T all conference proceedings CD