Luminescent Eu3+-doped transparent alumina ceramics with high hardness. Issue 14 (November 2017)

• Record Type: Journal Article
• Authors: Drdlikova, Katarina; Klement, Robert; Hadraba, Hynek; Drdlik, Daniel; Galusek, Dusan; Maca, Karel
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 14(2017)
• Page Start: 4271
• Page End: 4277
• Publication Date: 2017-11
• Subjects: Alumina -- Europium -- Luminescence -- Transparent ceramics -- Mechanical properties; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.05.007
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The Eu 3+ -doped transparent aluminas were prepared by wet shaping technique followed by pressure-less sintering and hot isostatic pressing. The effect of dopant amount on microstructure, real in-line transmission (RIT), photoluminescence (PL) properties, hardness and fracture behaviour was studied. The RIT decreased with increasing amount of the dopant. The PL emission spectra of Al2 O3 :Eu 3+ ceramics exhibited predominant red light emission with the highest intensity (under 394 nm excitation) for material containing 0.125 at.% of Eu 3+ and colour coordinates (0.645, 0.355) comparable with commercial red phosphors. The doping resulted in hardness increase from 26.1 GPa for undoped alumina to 27.6 GPa for Eu-doped sample. The study of fracture surfaces showed predominantly intergranular crack propagation micro-mechanism.