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Transparent MgAl2O4 ceramics were fabricated by reactive sintering in air followed by hot isostatic press treatment using commercial Al2O3 powder (γ-Al2O3 or α-Al2O3) and MgO powder as raw materials. The densification rate, microstructure and optical properties of the ceramics were investigated. Densification temperature of the sample from γ-Al2O3/MgO was lower than that from α-Al2O3/MgO. However,...
Highly transparent aluminum oxynitride ceramic was fabricated by presintering at 1900°C and further sintering by hot isostatic pressing (HIP) at 1900°C under a 190MPa argon atmosphere. For a 4.2mm thick specimen doped with 0.1wt.% Y 2 O 3 –La 2 O 3 , the inline light transmittance reached 78.8% at 600nm and 84.4% at 1084nm, respectively. Unlike the inhomogeneous microstructure...
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