Structure and crystallization behavior of mixed potassium-lithium niobiosilicate glasses

被引：4

作者：

Aronne, Antonio ^{[1
]}

Fanelli, Esther ^{[1
]}

Califano, Valeria ^{[1
]}

Fragneto, Antonia ^{[1
]}

Vergara, Alessandro ^{[2
]}

Sigaev, Vladimir N. ^{[3
]}

Pernice, Pasquale ^{[1
]}

机构：

[1] Univ Naples Federico II, Dipartimento Ingn Mat & Prod, I-80125 Naples, Italy

[2] Univ Naples Federico II, Dipartimento Chim, I-80126 Naples, Italy

[3] Mendeleev Univ Chem Technol, Moscow 125190, Russia

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 45-46期

关键词：

Bulk glasses; Crystallization; Raman spectra; Niobiosilicate glasses;

D O I：

10.1016/j.jnoncrysol.2008.07.029

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Potassium-lithium niobiosilicate (KLiNS) glasses with a composition of (27 - x)K2O center dot xLi(2)O center dot 27Nb(2)O(5) center dot 46SiO(2) (x = 0, 3, 12 and 20) have been synthesized by a melt-quenching method. The glass structure and devitrification behavior have been studied by Raman spectroscopy, DTA, and XRD. By increasing the lithium content, less distorted niobium octahedra increase, indicating a niobium clustering. This change strongly affects the crystallization behavior. In the glasses x = 0 and x = 3, just above T-g, only nanocrystals of all unidentified phase are formed, while for x = 12 and x = 20 potassium lithium niobate (KLN) solid solutions with tetragonal tungsten-bronze structure crystallize by bulk nucleation. In these glasses, LiNbO3 crystallizes at higher temperature by surface nuclei. Ultimately, it is possible to produce nanostructured glasses based on KLN nanocrystals, by partial replacement of K by Li. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：5041 / 5046

页数：6

共 26 条

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