THE SINTERING APPARENT ACTIVATION-ENERGY OF (U(0.8), TH(0.2))O(2) IN REDUCING THE OXIDIZING ATMOSPHERES

被引：11

作者：

AYBERS, MT

机构：

[1] Çekmece Nuclear Research and Training Center P.K. 1 Havaalani, Istanbul

来源：

JOURNAL OF NUCLEAR MATERIALS | 1994年 / 210卷 / 1-2期

关键词：

Isothermal shrinkage - Oxidizing atmospheres - Sintering apparent activation energy - Sintering kinetic parameters;

D O I：

10.1016/0022-3115(94)90224-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the sintering apparent activation energy of (U0.8, Th0.2)O2 is investigated in the first-stage sintering (600-degrees-C-1100-degrees-C) using the vertical dilatometer. With the aid of the shrinkage curves, the apparent activation energy and the diffusion coefficients are calculated under 75% H-2 + 25% N2 (P(O2) = 10(-15) atm) and CO2 (P(O2) = 10(-6) atm) atmospheres. The atmosphere has affected the activation energy and the diffusion mechanism. The activation energy is calculated to be about 339 kJ/mol (81 kcal/mol) in reducing atmosphere and 294.7 kJ/mol (70.5 kcal/mol) in oxidizing atmosphere.

引用

页码：73 / 77

页数：5

共 9 条

[1]

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[2] ON THE ACTIVATION ENERGY OF SINTERING NON-STOICHIOMETRIC URANIUM OXIDE [J].