Raman and infrared spectroscopy studies of LiNbO3 in niobate glass-ceramics

被引：33

作者：

Araújo, EB

De Paiva, JAC

Freitas, JA

Sombra, ASB

机构：

[1] Univ Fed Ceara, Dept Fis, LONLCM, BR-60451970 Fortaleza, Ceara, Brazil

[2] USN, Res Lab, Washington, DC 20375 USA

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1998年 / 59卷 / 05期

关键词：

glass; ceramics; ferroelectricity;

D O I：

10.1016/S0022-3697(97)00228-X

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Optical and structural properties of lithium niobophosphate glasses, with composition [xNb(2)O(5) .(50-x)P2O5 . 5OLi(2)O]:yFe(2)O(3), were studied by X-ray powder diffraction, infrared and Raman spectroscopies. Precipitation of ferroelectric LiNbO3 crystals was confirmed by X-ray powder diffraction in the sample 10Nb(2)O(5)-40P(2)O(5)-50Li(2)O:2Fe(2)O(3), under heat treatment. The crystallization processes of phosphorus-oxygen groups of different degrees of complexity, such as LiPO3, LiP2O7 and Li3PO4, were observed. The infrared and Raman spectroscopy results suggest that the increase of the ratio Nb2O5/P2O5 leads the niobium to sites of octahedral symmetry and consequently to the formation of ferroelectric LiNbO3, as observed by X-ray diffraction analysis. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：689 / 694

页数：6

共 22 条

[1] WAVE-GUIDES IN LITHIUM-NIOBATE [J].