Dense nanocrystalline glass ceramics of the Li2O-Al2O3-SiO2 (LAS) system were obtained by spark plasma sintering (SPS) of powders prepared by sol-gel method. The low thermal expansion LAS glass ceramic was chosen as host matrix for erbium ions. ZrO2 was added both as a nucleating agent and as a possible good environment for the rare earth. The developed crystalline phases were analysed by X-ray diffraction (XRD) and the amorphous phase was quantified. Scanning and transmission electron microscopy (SEM, TEM) was used to investigate the microstructure. A different behaviour during the crystallisation process was observed between the sample prepared through the sintering of powders and the glass produced by the melting technique. A photoluminescence characterisation was also performed. © 2005 Elsevier Ltd. All rights reserved.
Riello, P., Bucella, S., Zamengo, L., Anselmi_tamburini, U., Francini, R., Pietrantoni, S., et al. (2006). Erbium-doped LAS glass ceramics prepared by spark plasma sintering (SPS). JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 26(15), 3301-3306 [10.1016/j.jeurceramsoc.2005.08.003].
Erbium-doped LAS glass ceramics prepared by spark plasma sintering (SPS)
FRANCINI, ROBERTO;PIETRANTONI, SERENA;
2006-01-01
Abstract
Dense nanocrystalline glass ceramics of the Li2O-Al2O3-SiO2 (LAS) system were obtained by spark plasma sintering (SPS) of powders prepared by sol-gel method. The low thermal expansion LAS glass ceramic was chosen as host matrix for erbium ions. ZrO2 was added both as a nucleating agent and as a possible good environment for the rare earth. The developed crystalline phases were analysed by X-ray diffraction (XRD) and the amorphous phase was quantified. Scanning and transmission electron microscopy (SEM, TEM) was used to investigate the microstructure. A different behaviour during the crystallisation process was observed between the sample prepared through the sintering of powders and the glass produced by the melting technique. A photoluminescence characterisation was also performed. © 2005 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
