| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Solid-state Optical Materials and Luminescence Properties
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| Presentation Title |
Microstructure Tuning of Transparent Y<sub>2</sub>O<sub>3</sub> Ceramics via Zr Content and Sintering Under Vacuum or by SPS |
| Author(s) |
Dariia Chernomorets, Vojtěch Nečina, Pietro Galizia, Andreana Piancastelli, Giacomo Zanetti, Stefano Varas, Alessandro Chiasera, Laura Esposito, Roman Yavetskiy, Jan Hostaša |
| On-Site Speaker (Planned) |
Jan Hostaša |
| Abstract Scope |
Yttria (Y<sub>2</sub>O<sub>3</sub>) is a refractory material with good mechanical and thermal properties, along with a wide range of transparency. However, achieving transparency typically requires high sintering temperatures or post-HIP treatment due to its high melting point (T<sub>m</sub> > 2400 °C). In this study, our objective was to produce transparent yttria ceramics with limited grain growth at reduced sintering temperatures. The studied approaches coupled two specific sintering approaches: pressureless vacuum sintering and spark plasma sintering, coupled with the use of zirconia as a sintering aid in the range from 0 to 15 mol.%. Both approaches yielded ceramics with uniform microstructures and enhanced mechanical properties. However, the optimal ZrO<sub>2</sub> amount differed for the two sintering methods: 3 mol.% for SPS (considering transparency in the NIR region) compared to higher amounts, up to 15 mol.%, for samples sintered under vacuum, transparent both in visible and NIR. |