FTIR and DTA study of lanthanum aluminosilicate glasses

被引：124
作者：
Aronne, A
Esposito, S
Pernice, P
机构：
[1] University of Naples Federico II, Dept. of Mat. and Prod. Engineering, 80125 Naples, Piazzale Tecchio
来源：
MATERIALS CHEMISTRY AND PHYSICS | 1997年 / 51卷 / 02期
关键词：
lanthanum aluminosilicate; glass transition; FTIR;
D O I：
10.1016/S0254-0584(97)80287-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Structure and glass transition temperature of lanthanum aluminosilicate (LAS) glasses, containing: (15-25) mol% La2O3, (15-35) mol% Al2O3 and (40-70) mol% SiO2, were studied by FTIR spectroscopy and differential thermal analysis. The effects of La2O3 and Al2O3 content on the properties and structures of LAS glasses were evaluated. The Al+3 ion can assume both four-fold co-ordination, forming (AlO4/2) tetrahedra, and six-fold co-ordination forming (AlO6/2)(-3) octahedra. The amount of these depends on La+3 content; acting as network modifier, it can compensate the charge of three neighbouring (AlO4/2) units or one (AlO6/2)(-3) unit. (C) 1997 Elsevier Science S.A.
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页码：163 / 168
页数：6
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