Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7898044 | Journal of the European Ceramic Society | 2018 | 6 Pages |
Abstract
In this work, highly transparent yttria ceramics Φâ¯=â¯55â¯mm in size were fabricated by a hot-pressing method with 1 at.% ZrO2 or 12 at.% La2O3 as a sintering additive. For a 4-mm-thick specimen doped with ZrO2, the in-line transmittance reaches 71.1% at 400â¯nm and 80.9% at 1100â¯nm, and the transmittance of the La2O3-doped specimen is comparable to that of the ZrO2-doped specimen. By means of the relatively low sintering temperature of 1600â¯Â°C, the present samples exhibited very fine microstructures (<2â¯Î¼m), giving rise to excellent mechanical strength levels (â¼200â¯MPa). With regard to the 1 at.% ZrO2-doped specimen, the combination of high strength and high thermal conductivity (â¼10 W/mâ¯K) substantially improved parameters related to the thermal shock resistance. The results of this study indicate that the hot-pressed transparent yttria ceramic doped with 1 at.% ZrO2 is optically, mechanically, and thermally suitable for high-temperature IR window applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Lin Gan, Young-Jo Park, Lin-Lin Zhu, Ha-Neul Kim, Jae-Woong Ko, Hai-Doo Kim,