Optical, mechanical and fractographic response of transparent alumina ceramics on erbium doping

0480432 - ÚFM 2018 RIV GB eng J - Journal Article
Drdlík, D. - Drdlíková, K. - Hadraba, Hynek - Máca, K.
Optical, mechanical and fractographic response of transparent alumina ceramics on erbium doping.
Journal of the European Ceramic Society. Roč. 37, č. 14 (2017), s. 4265-4270. ISSN 0955-2219. E-ISSN 1873-619X
R&D Projects: GA MŠMT(CZ) LQ1601; GA ČR(CZ) GA15-06390S
Institutional support: RVO:68081723
Keywords : Alumina * Erbia * Fractography * Hardness * Transparency
OECD category: Ceramics
Impact factor: 3.794, year: 2017

Alumina ceramics found their utilisation in many applications which can be further extend by attaining functional properties, in our case the transparency obtained through precise processing and photoluminescence due to erbium (Er) doping. In order to examine the optical, mechanical and fractographic response of transparent alumina on Er doping, slip casted samples containing 0-0.15 at.% of erbium nano-oxide were pre-sintered by two-step sintering regime and then hot isostatically pressed. Prepared samples exhibited fully dense submicron microstructure and corresponding high transparency (RIT up to 60%). Positive influence of doping on the Vickers hardness resulted in values up to 27 GPa (at 10 N load). Moreover, the comparison of the Vickers hardness determined at different loadings with literature data showed that the Er doped alumina is one of the hardest material in this category. The samples were characterised also in terms of fracture toughness and fractographic behaviour.
Permanent Link: http://hdl.handle.net/11104/0276861