The Complex Sol-Gel Process for producing small ThO2 microspheres

被引：11

作者：

Brykala, Marcin ^{[1
]}

Rogowski, Marcin ^{[1
]}

机构：

[1] Inst Nucl Chem & Technol, 16 Dorodna Str, PL-03195 Warsaw, Poland

来源：

JOURNAL OF NUCLEAR MATERIALS | 2016年 / 473卷

关键词：

Thorium dioxide; Microspheres; Complex Sol-Gel Process; Ascorbic acid; ICHTJ process; INERT MATRIX; THORIUM; NUCLEAR; PELLETS; TEMPERATURE; PRECURSORS;

D O I：

10.1016/j.jnucmat.2016.03.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thorium based fuels offer several benefits compared to uranium based fuels thus they might be an attractive alternative to conventional fuel types. This study is devoted to the synthesis and the characterization of small thorium dioxide microspheres (O < 50 mu m). Their application involves using powder-free process, called the Complex Sol-Gel Process. The source sols used for the processes were prepared by the method where in the starting ascorbic acid solution the solid thorium nitrate was dissolved and partially neutralized by aqueous ammonia under pH control. The microspheres of thorium-ascorbate gel were obtained using the ICHTJ Process (INCT in English). Studies allowed to determine an optimal heat treatment with calcination temperature of 700 degrees C and temperature rate not higher than 2 degrees C/min which enabled us to obtain a crack-free surface of microspheres. The main parameters which have a strong influence on the synthesis method and features of the spherical particles of thorium dioxide are described in this article. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：249 / 255

页数：7

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