Optimal sintering parameters for Al2O3 optoceramics with high transparency by spark plasma sintering
Langue
en
Article de revue
Ce document a été publié dans
Advances in Applied Ceramics. 2016, vol. 115, n° 6, p. 333-341
Maney Publishing
Résumé en anglais
Transparent Polycrystalline Alumina (PCA) optical ceramics were fabricated at a high heating rate and low temperature by spark plasma sintering (SPS). Maximum pressure (100 MPa) at dwell time keeps the grain size small ...Lire la suite >
Transparent Polycrystalline Alumina (PCA) optical ceramics were fabricated at a high heating rate and low temperature by spark plasma sintering (SPS). Maximum pressure (100 MPa) at dwell time keeps the grain size small irrespective of the dwell time. A heating and cooling rate of 100°C min−1 at the sintering temperature of 1150°C for a dwell time of 1 h at 100 MPa yielded highly densified samples with the good transparency of 63 and 83% in visible and infra-red region, respectively. Optoceramics yielded a mechanical hardness of (3000 Hv)/ 29.42 GPa and a thermal conductivity of 21 Wm−1 K−1.< Réduire
Mots clés en anglais
Polycrystalline Alumina
Spark plasma sintering
Sintering parameters
Cooling rate
Mechanical strength
Optical ceramics
Origine
Importé de halUnités de recherche