XANES AND EXAFS STUDY OF GLASSES OF THE TIO2-NA2O-P2O5 SYSTEM

被引：21

作者：

FARGIN, E

DUCHESNE, C

OLAZCUAGA, R

LEFLEM, G

CARTIER, C

CANIONI, L

SEGONDS, P

SARGER, L

DUCASSE, A

机构：

[1] UNIV PARIS 11,UTILISAT RAYONNEMENT ELECTROMAGNET LAB,F-91405 ORSAY,FRANCE

[2] UNIV BORDEAUX 1,CTR PHYS MOLEC OPT & HERTZIENNE,F-33405 TALENCE,FRANCE

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1994年 / 168卷 / 1-2期

关键词：

D O I：

10.1016/0022-3093(94)90128-7

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：

X-ray absorption measurements (XANES-EXAFS) have been performed on the series of glasses with composition xTiO(2) . yNa(2)O . zP(2)O(5) (y/z = 4/3 and x = 10.7-34.6 mol%). Two Ti-O distances of about 1.65 Angstrom and 1.95 Angstrom have been found, and Ti-Ti correlations (about 3.4 Angstrom) have been observed for x = 26.4 and 34.6%. A model is proposed to explain the progressive modifications of XANES and EXAFS spectra with increasing x. Two different types of site for titanium have been identified in these glasses, in which Ti is respectively sixfold- and fivefold-coordinated. The rate of fivefold-coordinated Ti increases with increasing x.

引用

页码：132 / 136

页数：5

共 12 条

[1] XANES AND EXAFS STUDY OF TITANIUM ALKOXIDES [J].