Near single phase zirconolite ceramics, prototypically CaZrTi₂O₇, were fabricated by reactive spark plasma sintering (RSPS), from commercially available CaTiO₃, ZrO₂ and TiO₂ reagents, after processing at 1200 °C for only 1 h. Ceramics were of theoretical density and formed with a controlled mean grain size of 1.9 ± 0.6 μm. The reducing conditions of RSPS afforded the presence of paramagnetic Ti³⁺, as demonstrated by EPR spectroscopy. Overall, this study demonstrates the potential for RSPS to be a disruptive technology for disposition of surplus separated plutonium stockpiles in ceramic wasteforms, given its inherent advantage of near net shape products and rapid throughput.

在1200°C下仅处理1 h后，通过反应火花等离子体烧结（RSPS），由市售的CaTiO ₃，ZrO ₂和TiO ₂试剂制备了近单相锆石陶瓷，原型为CaZrTi ₂ O ₇。陶瓷具有理论密度，并且形成的受控平均晶粒尺寸为1.9±0.6μm。如EPR光谱所示，RSPS的还原条件提供了顺磁性Ti ³⁺的存在。总的来说，这项研究证明了RSPS潜在的破坏性技术，因为它具有接近净形产品和快速生产的固有优势，可用于处置陶瓷废料中多余的分离separated库存。