Presentation Information
[8a-A31-6]Fabrication of Nd:YAG Transparent Ceramics by Spark Plasma Sintering with LiF Additive
〇(P)Dariia Chernomorets1, Sanae Koizumi1, Hiroaki Furuse1 (1.NIMS)
Keywords:
Transparent Ceramics,YAG:Nd,Spark Plasma Sintering
Transparent Nd:YAG ceramics are promising materials for solid-state laser applications due to their excellent optical, thermal, and mechanical properties.
In this study, transparent Nd:YAG ceramics were fabricated by spark plasma sintering (SPS) using commercially available powders. The effects of LiF addition and holding time on densification, microstructure evolution, and optical properties were investigated. SPS was carried out at 1350 °C under a uniaxial pressure of 90 MPa for 10 min.
LiF addition promoted densification and reduced residual porosity, leading to improved optical quality. The resulting ceramics exhibited a homogeneous fine-grained microstructure with an average grain size of ~1.1 μm, indicating effective suppression of grain growth during SPS. A maximum in-line transmittance of 83.4% at 1064 nm was obtained for a 0.45 mm thick specimen. The results demonstrate that LiF-assisted SPS is an effective approach for producing highly transparent Nd:YAG ceramics while maintaining a fine-grained microstructure.
In this study, transparent Nd:YAG ceramics were fabricated by spark plasma sintering (SPS) using commercially available powders. The effects of LiF addition and holding time on densification, microstructure evolution, and optical properties were investigated. SPS was carried out at 1350 °C under a uniaxial pressure of 90 MPa for 10 min.
LiF addition promoted densification and reduced residual porosity, leading to improved optical quality. The resulting ceramics exhibited a homogeneous fine-grained microstructure with an average grain size of ~1.1 μm, indicating effective suppression of grain growth during SPS. A maximum in-line transmittance of 83.4% at 1064 nm was obtained for a 0.45 mm thick specimen. The results demonstrate that LiF-assisted SPS is an effective approach for producing highly transparent Nd:YAG ceramics while maintaining a fine-grained microstructure.