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Compactibility and sintering behavior of nanocrystalline (Th1−xCex)O2 powders synthesized by co-precipitation process |
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| Authors: | Ö Yildiz G Modolo |
| Affiliation: | a Kocaeli University, Faculty of Engineering, Department of Metallurgical and Materials Engineering, TR-41380 Kocaeli, Turkey b Institute for Energy Research and Reaktor Technology, Research Centre Jülich, D-52425 Jülich, Germany c Institute of Mineral Engineering (Ceramic, Glass, Refractory and Building Materials) of RWTH Aachen, D-52064 Aachen, Germany |
| Abstract: | Thoria (ThO2) based ceramic material is a versatile and very important matrix for immobilization of plutonium and other tetravalent actinides either as a burning or a deposition material for final disposal. The aim of this study was to investigate the influence of the actinide concentration (simulated with cerium), the fabrication conditions and the properties of the produced powders on the compactibility and sinterability of the final products. The (Th1−xCex)O2 powders with ceria concentration varying from 5 to 50 mol% were synthesized by co-precipitation method. The pellets were then compacted from calcined and ground powders at pressures varying from 250 to 750 MPa. The produced pellets had a homogenous grain size and sintered densities of 0.88% to 0.95% TD, respectively. |
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