Morphology dependent sintering path of nanocrystalline ThO2

被引：8

作者：

Wangle, T. ^{[1
,2
,3
]}

Belis, M. ^{[1
,4
]}

Tyrpekl, V. ^{[1
,4
]}

Pakarinen, J. ^{[1
]}

Cardinaels, T. ^{[1
,5
]}

Delloye, T. ^{[3
]}

Vleugels, J. ^{[2
]}

Verwerft, M. ^{[1
]}

机构：

[1] Belgian Nucl Res Ctr SCK CEN, Inst Nucl Mat Sci, Boeretang 200, B-2400 Mol, Belgium

[2] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44,POB 2450, B-3001 Heverlee, Belgium

[3] Solvay RICL, 85 Ave Freres Perret, St Fons 69190, France

[4] Charles Univ Prague, Fac Sci, Dept Inorgan Chem, Hlavova 2030, Prague 2, Czech Republic

[5] Katholieke Univ Leuven, Dept Chem, Celestijnenlaan 200F,PO 2404, B-3001 Heverlee, Belgium

来源：

JOURNAL OF NUCLEAR MATERIALS | 2020年 / 533卷

关键词：

Thoria; Thorium oxide; Thorium oxalate; Sintering; Morphology; FISSION-GAS RELEASE; GRAIN-SIZE; OXALATE; UO2; PRECIPITATION; POWDERS; DECOMPOSITION; CALCINATION; DIFFUSION; BEHAVIOR;

D O I：

10.1016/j.jnucmat.2020.152081

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thorium is most commonly precipitated as oxalate, because of the high efficiency regardless of precipitation conditions. Thorium oxalate readily decomposes into fine-grained ThO2 during heating, but keeps the macrostructure of the oxalate platelets. To assess the effects of precipitate macrostructure on the sintering behavior, different platelet morphologies were prepared and sintered. There are two factors which influence the sintering: the presence of holes within the platelets and the size of the platelets. Small platelets or precipitates with holes generally sinter to thorium dioxide pellets of a higher density and smaller grain size. (c) 2020 Elsevier B.V. All rights reserved.

引用

页数：10

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