Journal
CERAMICS INTERNATIONAL
Volume 37, Issue 8, Pages 3565-3573Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2011.05.152
Keywords
Grain size; Porosity; Optical properties; Al2O3; Doping; Spark Plasma Sintering
Categories
Funding
- ANR CERATRANS
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A slurry of alpha-Al2O3 was doped with Mg, Zr and La nitrates or chlorides, in various amounts in the range 150-500 wt ppm and then freeze-dried to produce nanosized doped powder (similar to 150 nm). The powder was sintered by SPS to yield transparent polycrystalline alpha alumina. The influence of the nature of the doping element and the starting salt, the thermal treatment before sintering and the sintering temperature on the transparency of the ceramics were investigated. The transparency of the ceramics of nanosized Al2O3 was shown to depend mainly on the way the powder was prepared, the nature of the doping salt also had an effect. Finally, a high real inline transmittance, reaching 48.1% was achieved after optimization. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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