X-ray absorption study of the coordination of titanium in sodium-titanium-silicate glasses

被引:33
作者
Ponader, CW
Boek, H
Dickinson, JE
机构
[1] Corning Incorporated, Corning
关键词
D O I
10.1016/0022-3093(95)00636-2
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
The local structure around titanium in sodium-titanium-silicate glasses was determined as a function of the silica content and the Na/Ti ratio. The samples covering the range 16.7-33 mol% Na2O and 16.7-33 mol% TiO2 were prepared by melting predetermined mixtures of Na2CO3, TiO2, and SiO2 at 1400 degrees C. They were studied using X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectroscopies around the Ti K-edge at 4966 eV. The data indicate that titanium is found in two sites in the glass. In one site, titanium is coordinated by six oxygens; in the other, titanium is coordinated by five oxygens. The number of five-coordinated titanium atoms increases relative to the number of six-coordinated titanium atoms as the silica content of the glass decreases. The ratio of five- to six-coordinated sites decreases as the Na/Ti ratio of the glass decreases at a fixed silica content.
引用
收藏
页码:81 / 94
页数:14
相关论文
共 53 条
[11]   REFINEMENT OF STRICTURE OF LI2TIO3 [J].
DORRIAN, JF ;
NEWNHAM, RE .
MATERIALS RESEARCH BULLETIN, 1969, 4 (03) :179-&
[12]   PREPARATION OF LI4TIO4 CONTAINING TETRAHEDRALLY COORDINATED TI4+ [J].
DUBEY, BL ;
WEST, AR .
NATURE-PHYSICAL SCIENCE, 1972, 235 (60) :155-&
[13]  
Egorov-Tismenko Yu. K., 1978, Soviet Physics - Doklady, V23, P289
[14]   STUDY OF DISORDERED SYSTEMS BY EXAFS - LIMITATIONS [J].
EISENBERGER, P ;
BROWN, GS .
SOLID STATE COMMUNICATIONS, 1979, 29 (06) :481-484
[15]  
FARGES F, 1994, PHYS CHEM MINER, V20, P504
[16]   INVESTIGATION OF TIO2-SIO2 GLASSES BY X-RAY ABSORPTION-SPECTROSCOPY [J].
GREEGOR, RB ;
LYTLE, FW ;
SANDSTROM, DR ;
WONG, J ;
SCHULTZ, P .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1983, 55 (01) :27-43
[17]   STUDY OF THE K EDGES OF 3D TRANSITION-METALS IN PURE AND OXIDE FORM BY X-RAY-ABSORPTION SPECTROSCOPY [J].
GRUNES, LA .
PHYSICAL REVIEW B, 1983, 27 (04) :2111-2131
[18]   PROPERTIES OF SODIUM TITANIUM SILICATE GLASSES [J].
HAMILTON, EH ;
CLEEK, GW .
JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS, 1958, 61 (02) :89-94
[19]   SIGNIFICANCE TESTS ON CRYSTALLOGRAPHIC R FACTOR [J].
HAMILTON, WC .
ACTA CRYSTALLOGRAPHICA, 1965, 18 :502-&
[20]   COORDINATION OF TITANIUM IN SODIUM TITANIUM SILICATE-GLASSES [J].
HANADA, T ;
SOGA, N .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1980, 38-9 (MAY-) :105-110