Lanthanide-doped SiO2–Al2O3 aerogels and densified glasses

Grandi, S.; Costa, L. F. da

doi:10.1016/s0022-3093(98)00109-4

Cited by 14 publications

(5 citation statements)

References 18 publications

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“…During supercritical drying, the gel is heated above the critical temperature and pressure of the liquid phase. Aerogels have very low densities and are good thermal insulators, but they are not often used as host for spectroscopically active metal ions or organic molecules . The aerogel can also be further densified to a silica glass.…”

Section: Sol−gel Hybrid Materialsmentioning

confidence: 99%

“…Aerogels have very low densities and are good thermal insulators, but they are not often used as host for spectroscopically active metal ions or organic molecules. 155 The aerogel can also be further densified to a silica glass. To get thin films, the silica gel is spin-coated or dip-coated prior to gelation on a suitable substrate (e.g., a microscope glass slide or a quartz disk).…”

Section: Inorganic Sol-gel Systemsmentioning

confidence: 99%

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Lanthanide-Based Luminescent Hybrid Materials

2009

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Koen Binnemans was born in Geel, Belgium, in 1970. He obtained his M. Sc. degree (1992) and Ph.D. degree (1996) in Chemistry at the Catholic University of Leuven, under the supervision of Prof. C. Go ¨rller-Walrand. In the period 1999-2005, he was a postdoctoral fellow of the Fund for Scientific Research Flanders (Belgium). He did postdoctoral work with Prof. Jacques Lucas (Rennes, France) and Prof. Duncan W. Bruce (Exeter, U.K.). In 2000, he received the first ERES Junior Award (ERES, European Rare-Earth and Actinide Society). From 2002 until 2005, he was (parttime) associate professor. Presently, he is professor of chemistry at the Catholic University of Leuven. His current research interests are metalcontaining liquid crystals (metallomesogens), lanthanide-mediated organic reactions, lanthanide spectroscopy, luminescent molecular materials, and ionic liquids.

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Section: Sol−gel Hybrid Materialsmentioning

confidence: 99%

Section: Inorganic Sol-gel Systemsmentioning

confidence: 99%

Lanthanide-Based Luminescent Hybrid Materials

2009

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“…Silicon and aluminium alkoxide precursors were hydrolyzed separately and then mixed with the lanthanide precursors: Pr (NO3), Sm(NO3), EuCl3, at around 1,250 °C, the doped aerogels densified. However the authors [34] reported variations in the aluminium and lantahnide composition between the surface and the center of the densified materials .…”

Section: Multicomponent Glassesmentioning

confidence: 98%

“…Lanthanide-doped SiO2-Al2O3 glasses were synthesized [34] from aerogels. Silicon and aluminium alkoxide precursors were hydrolyzed separately and then mixed with the lanthanide precursors: Pr (NO3), Sm(NO3), EuCl3, at around 1,250 °C, the doped aerogels densified.…”

Section: Multicomponent Glassesmentioning

confidence: 99%

Porous Glasses, Binary Glasses, and Composite Glasses from Aerogels

Woignier,

Reynes,

Phalippou

2023

Springer Handbooks

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This chapter describes the different steps of the transformations of a gel into an aerogel and into glass and the physical properties of the different materials derived from sintered silica aerogels. Silica glasses can be synthesized by sintering silica aerogels at temperatures ranging from 900 to 1,200 °C close to half the temperatures used for the glass melting process. The heat treatment can be taillored to obtain fully densified or porous glasses. Supercritical drying also enables the synthesis of aerogels from a wide range of binary compositions giving rise to binary or ternary silicate glasses after sintering. Another interesting application of aerogels is as a host matrix for the synthesis of multi-phase materials, doped material glasses, or composites. Their large pore volume is used as a sponge to incorporate chemical species in such a way as to form a two-phase material. The chemical species are first processed in liquid form and can be dried after the pores are filled. The result is a nanocomposite material composed of salt oxide embedded in the silica matrix.

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“…Maintaining the molar ratio invariable, the amount of water was changed from 0.36 to 0.72 ml. Then, at this temperature, 2.0 ml of acetic acid was added in order to peptize the mono-hydroxide thus formed a transparent sol [15].…”

Section: Fabrication Of Gelsmentioning

confidence: 99%

Devitrification behavior and structure of Li2O–B2O3–Al2O3 composite gels from metal alkoxides

Li¹,

Li²,

Qi³

et al. 2010

Journal of Non-Crystalline Solids

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Lanthanide-doped SiO2–Al2O3 aerogels and densified glasses

Cited by 14 publications

References 18 publications

Lanthanide-Based Luminescent Hybrid Materials

Lanthanide-Based Luminescent Hybrid Materials

Porous Glasses, Binary Glasses, and Composite Glasses from Aerogels

Devitrification behavior and structure of Li2O–B2O3–Al2O3 composite gels from metal alkoxides

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