Design of oxy-fluoride glass-ceramics containing NaLaF4 nano-crystals

被引：81

作者：

de Pablos-Martín, A. ^{[1
]}

Mather, G. C. ^{[1
]}

Munoz, F. ^{[1
]}

Bhattacharyya, S. ^{[2
,3
]}

Hoeche, Th ^{[3
]}

Jinschek, J. R. ^{[4
]}

Heil, T. ^{[5
]}

Duran, A. ^{[1
]}

Pascual, M. J. ^{[1
]}

机构：

[1] CSIC, Inst Ceram & Vidrio, Madrid 28049, Spain

[2] Tata, Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Bombay 400005, Maharashtra, India

[3] Leibniz Inst Oberflachenmodifizierung eV, D-04318 Leipzig, Germany

[4] FEI Co, Europe Nanoport, NL-5651 GG Eindhoven, Netherlands

[5] Univ Munster, Inst Phys, D-48149 Munster, Germany

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2010年 / 356卷 / 52-54期

关键词：

Oxy-fluoride glass-ceramics; NaLaF4; nano-crystals; photonic applications; FIXED VISCOSITY POINTS; UP-CONVERSION; NANOCRYSTALLIZATION; CRYSTALLIZATION; LUMINESCENCE; IONS; LAF3;

D O I：

10.1016/j.jnoncrysol.2010.04.057

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

081705 [工业催化]; 082905 [生物质能源与材料];

摘要：

Fluoride glass-ceramics doped with lanthanide ions are very promising materials for optical devices. In this study, transparent fluoride glass-ceramics have been obtained from oxy-fluoride glasses in the Na2O-Al2O3-SiO2-LaF3 system by heat treatment slightly above T-g, upon which NaLaF4 nano-crystals with a size of up to 20 nm precipitate. The crystallisation mechanism is suggested to involve the formation of a SiO2-enriched shell around the nano-crystals which hampers their further growth, limits Ostwald ripening, and promotes uniformity in size. This desired enrichment of lanthanide ions inside nano-crystals with an adjustable and uniform size distribution is essential for future photonic applications. To validate the crystallisation mechanism of this glass system, the structure and composition of the crystalline phase, glass matrix and the developing interface have been studied by viscosity, dilatometry, X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：3071 / 3079

页数：9

共 45 条

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Structural and spectroscopic characterization of active sites in a family of light-emitting sodium lanthanide tetrafluorides [J].