About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Solid-state Optical Materials and Luminescence Properties
|
Presentation Title |
Yb Doped MgO Transparent Ceramics Sintered through the SPS Method |
Author(s) |
Guangran Zhang , Xuan Chen, Yiquan Wu, Robert Tomala , Dariusz Hreniak |
On-Site Speaker (Planned) |
Guangran Zhang |
Abstract Scope |
Magnesium oxide (MgO) is a wide band-gap insulator (7.8 eV) with a rock salt crystal structure. When MgO is used as a laser host material, the thermal conductivity of MgO ceramics at room temperature is ~55 Wm-1K-1, a value much higher than that of YAG (~9 Wm-1K-1). However, the fabrication of MgO transparent ceramics is highly challenging because of the high melting point of MgO. In the present work, Yb doped (0, 0.02, 0.1 and 0.5 at.%) MgO transparent ceramics were synthesized through spark plasma sintering (SPS) at the relatively low temperature of 1100°C for 5–60 min under a pressure of 105 MPa. The effects of dopant concentration and sintering holding time on the densification and microstructure evolution of MgO ceramics were investigated. The influence of Yb doping on the crystalline phase and microstructure was explored, and the photoluminescence properties of Yb in transparent MgO ceramics were investigated. |