Temperature dependence of carbon contamination in spark plasma sintered Y2O3

Y2O3 fabricated via Spark Plasma Sintering (SPS) has the potential to possess fine grain sizes and high-quality samples for optical applications. However, carbon contamination is a well-known issue for materials fabricated by SPS due to graphite tooling. In this work, high density, fine grained yttr...

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Bibliographic Details
Published inJournal of the European Ceramic Society Vol. 44; no. 6; pp. 4255 - 4259
Main Authors Gild, Joshua, Floyd, Adam, Sadowski, Bryan, Zhou, Tony, Kim, Woohong, Bayya, Shyam, Sanghera, Jasbinder
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.2024
Subjects
Field assisted sintering technique
Optical material
Spark plasma sintering
Transparent ceramic
Yttrium oxide
Optical material
Transparent ceramic
Spark plasma sintering
Yttrium oxide
Field assisted sintering technique
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Summary:Y2O3 fabricated via Spark Plasma Sintering (SPS) has the potential to possess fine grain sizes and high-quality samples for optical applications. However, carbon contamination is a well-known issue for materials fabricated by SPS due to graphite tooling. In this work, high density, fine grained yttria with grains in the 0.5–2 µm range was sintered at 1350 °C under 100 MPa for 20 min. The carbon contamination was examined via the effect of load application temperature on carboxylate contamination absorption in 6.5–7.0 µm range and overall transmission in the visible. Higher load application temperatures were found to minimize carboxylate absorption in the IR but were detrimental to visible transparency. A load temperature of 1100 °C was found to be necessary for minimal carboxylate contamination and ensuring high visible transmission.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2023.12.100