Thermal and crystallization behaviour of ThO2-CeO2 system

被引：12

作者：

Bukaemskiy, A. A. ^{[1
]}

Barrier, D. ^{[1
]}

Modolo, G. ^{[1
]}

机构：

[1] KFA Julich GmbH, Forschungszentrum, Inst Energy Res Safety Res & Reactor Technol, D-52425 Julich, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 485卷 / 1-2期

关键词：

Nuclear reactor materials; Precipitation; Crystal structure; Thermal analysis; X-ray diffraction; ThO2; CeO2; INERT MATRIX; THORIA; FUEL;

D O I：

10.1016/j.jallcom.2009.06.090

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of the addition of ceria on the thermal behaviour and crystallization of thoria powders prepared by a "soft" co-precipitation method was investigated in detail using TG-DSC and XRD. It was shown that the synthesized powders consist of a mixture of pure thoria and cera and (ThCe)O-2 solid solution with ceria content different from the initial. All powders were crystallized after drying. and a solid solution with homogeneous composition of (ThCe)O-2 was formed during heating from 700 to 1100 degrees C. At temperatures above 1100 degrees C. all investigated powders form homogeneous (ThCe)O-2 solid solutions with face-centred cubic. fluorite-type structures, without any apparent segregation of ceria or thoria. The (ThCe)O-2 lattice parameter was found to be a function of the ceria content according to Vegard's law. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：783 / 788

页数：6

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