Effect of induced crystallization in rare-earth doped lithium borate glass. (July 2016)

• Record Type: Journal Article
• Authors: Steudel, Franziska; Rimbach, A. Charlotte; Loos, Sebastian; Ahrens, Bernd; Schweizer, Stefan
• Is Part Of: Radiation measurements. Volume 90(2016:Jul.)
• Page Start: 274
• Page End: 278
• Publication Date: 2016-07
• Subjects: Photon conversion -- Borate glasses -- Glass ceramics -- Rare-earth ion doping -- Crystallization; Nuclear emulsions -- Periodicals; Particle tracks (Nuclear physics) -- Periodicals; Thermoluminescence -- Periodicals; Cosmic rays -- Periodicals; Radiation -- Measurement -- Periodicals; Radiometry -- Periodicals; Radiation Monitoring -- Periodicals; Émulsions nucléaires -- Périodiques; Particules (Physique nucléaire) -- Traces -- Périodiques; Thermoluminescence -- Périodiques; Rayonnement cosmique -- Périodiques; Radiométrie -- Périodiques; 539.77
• DOI: 10.1016/j.radmeas.2015.12.046
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: Rare-earth doped borate glasses and glass ceramics are investigated for their potential as photon converters. Thermal processing of the as-made glass results in the formation of nanocrystals therein. For optical activation, the glasses are doped with Eu 3+ and Tb 3+, both enabling an intense emission under ultraviolet excitation. Differential scanning calorimetry and X-ray diffraction are applied to analyze the crystallization behavior. Compared to the undoped glass, the glass transition temperature as well as the crystallization temperature are increased with Eu 3+ doping. Upon thermal processing of the as-made glasses, the transmittance is significantly reduced. Preliminary photoluminescence quantum efficiency measurements yield lower values for the glass ceramics. Highlights: Thermally-induced formation of nanocrystals in rare-earth doped Li borate glass. Higher crystallization tendency in undoped compared to the rare-earth doped glass. Increase of glass transition and crystallization temperatures with Eu 3+ doping. Decrease of transmittance and luminescence quantum efficiency with crystallization.