Glass formation in the MoO3-La2O3-Nd2O3 system

被引：12

作者：

Aleksandrov, Lyubomir ^{[1
]}

Iordanova, Reni ^{[1
]}

Dimitriev, Yanko ^{[2
]}

Handa, Katsumi ^{[3
]}

Ide, Junko ^{[3
]}

Milanova, Margarita ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Inst Gen & Inorgan Chem, G Bonchev Str,Bld 11, BU-1113 Sofia, Bulgaria

[2] Univ Chem Techol Met, Dept Silicate Technol, BU-1756 Sofia, Bulgaria

[3] Ritsumeikan Univ, Fac Sci & Engn, Shiga 5258577, Japan

来源：

GLASS - THE CHALLENGE FOR THE 21ST CENTURY | 2008年 / 39-40卷

关键词：

glasses; network; structure; XAFS; DTA; IR;

D O I：

10.4028/www.scientific.net/AMR.39-40.37

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：

Novel low melting glasses in the MoO3-La2O3-Nd2O3 system were obtained at different cooling rates (10(2) K/s and 10(4)-10(5) K/s). Characterization of the amorphous samples was made by differential thermal analysis (DTA) and X-ray absorption fine structure (XAFS) method. According to DTA data of the glass samples, the glass transition temperatures are at 325-330 degrees C, the crystallization started above 410 degrees C and the melting temperatures are at 660-720 degrees C. A structural model of glasses was suggested on the basis of XAFS and IR investigations. It was shown that the predominant structural units in the amorphous network of glasses containing 90 -80 mol% MoO3 are MoO6 groups. The appearance of MoO4 groups deteriorates the glass formation ability.

引用

页码：37 / +

页数：2

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