高放废物(HLW)是国内外放射性废物处理的重点和难点，人造岩石能够将核素原子固定于其晶格结构中，是较为理想的HLW固化介质。本课题拟选用人造岩石中稳定性高的钙钛锆石矿相，作为长寿命锕系HLW的固化基材，采用反应温度高、速度快、操作简便的自蔓延高温合成(SHS)技术，同时结合快速加压工艺，制备性能优异的钙钛锆石基人造岩石固化基材；添加Nd和Ce的氧化物模拟三价和四价锕系核素，制备包容模拟核素的钙钛锆石固化体；研究模拟锕系核素在钙钛锆石中的赋存状态及固化机制，探明固化体对不同模拟元素的极限包容量，并测定其机械性能和化学稳定性。本研究有望为SHS制备钙钛锆石固化基材提供依据，为简化人造岩石的制备工艺、推动锕系HLW的人造岩石固化和最终安全处置提供技术支持。

The disposal of high-level radioactive waste(HLW) is a complex and technological problem in the processing of radioactive wastes around the world. Synroc, which has been considered as the waste form of second generation, is suggested as the potential immobilization material for HLW as it exhibits high chemical, thermal and radiation stability. Nuclide atoms can be fixed in the crystal lattice of synroc structure and the eventual security can be guaranteed. One synroc mineral, zirconolite, is chosen as the waste form of long-lived actinide nuclides in this project. Self-propagating high-temperature synthesis(SHS) is utilized as the preparation route. With the combination of quick press and optimization of processing parameters, zirconolite based mineral-like waste form with excellent properties will be prepared. Oxides of Nd and Ce will be added as the simulated elements of trivalent and tetravalent actinide nuclides in the synthesis procedure. Zirconolite based solidified body will be synthesized with immobilization of the simulated elements. Mode of occurrence, immobilizing mechanism and ultimate capacity of the simulated elements in zirconolite based waste form will be studied. The mechanical property and chemical stability will be characterized as well. This research will be a direction for the preparation of zirconolite based solidified body from SHS process. This project will also provide technological support for the immobilization of actinide nuclides by synroc process and their eventual disposal with prolonged security.