2-31 An Improved Internal Gelation Process for Fabricating CeO2 Ceramic Microspheres as a Surrogate of PuO2 Nuclear Fuels

摘要

In this work,an advanced approach is described to simplify the internal gelation process.The chemical kenetics of the internal gelation process is systematically studied by two different methods.The gelation time is affected by three factors:[OH?]/[Ce4+],[HMTA]/[Ce4+]and temperature(T).The gelation process speeds up when we increase the[OH?]/[Ce4+],[HMTA]/[Ce4+]and temperature(T).Gels with good property can be achieved by adjusting the[OH?]/[Ce4+],[HMTA]/[Ce4+].The room temperature stock cerium nitrate solution and HMUR solution were delivered separately by two HPLC pumps and mixed statically in a commercial T-typed mixer just before the drop formation[1].