STRUCTURAL STUDY OF AMORPHOUS WO3 THIN-FILMS PREPARED BY THE ION-EXCHANGE METHOD

被引:58
作者
NANBA, T [1 ]
NISHIYAMA, Y [1 ]
YASUI, I [1 ]
机构
[1] UNIV TOKYO,INST IND SCI,MINATO KU,TOKYO 106,JAPAN
关键词
D O I
10.1557/JMR.1991.1324
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The structure of amorphous tungsten trioxide films was investigated with IR and Raman spectroscopic analyses and an XRD method. The films were prepared by ion exchange from sodium tungstate as a starting material. Films consisted of microclusters of 10-30 angstrom diameter, in which the networks are formed with WO6 octahedra sharing their corners and edges. The networks in the as-prepared samples consisted of WO6 units with low symmetry, in which termination by W = O and W-OH2 groups was common. As the post-annealed temperature became higher, the symmetry of WO6 was improved and the edge-sharing octahedra disappeared.
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页码:1324 / 1333
页数:10
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