Synthesis and characterisation of Ce-doped zirconolite Ca0.80Ce0.20ZrTi1.60M0.40O7 (M = Fe, Al) formed by reactive spark plasma sintering (RSPS)
Synthesis and characterisation of Ce-doped zirconolite Ca0.80Ce0.20ZrTi1.60M0.40O7 (M = Fe, Al) formed by reactive spark plasma sintering (RSPS)
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DOI：
10.1557/s43580-022-00221-6
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发表时间：
2022-02-07
期刊：
影响因子：
0.8
通讯作者：
Blackburn, Lewis R.
中科院分区：
文献类型：
--
作者：
Aldean, Ismail;Sun, Shi-Kuan;Blackburn, Lewis R.
反应放电等离子体烧结已被利用作为一个高通量的处理路线，用于合成两个模拟锆沸石废物材料，针对Ca0.80Ce0.20ZrTi1.60M0.40O7（M = Fe 3+和Al 3+）。材料在15 MPa单轴压力下处理，加热/冷却速率为100摄氏度/分钟至1320摄氏度，保持在真空下。尽管锆英石-2M的产率中等（> 80重量%），但在两种制剂中形成了相当多的富Ce钙钛矿相，这归因于Ce存量完全还原为Ce 3+，如通过Ce L-3-边缘XANES分析所确定的。与Al 3+电荷平衡的组合物有利于基于较低的伴随钙钛矿分数。
Reactive spark plasma sintering has been utilised as a high-throughput processing route for the synthesis of two simulant zirconolite wasteform materials, targeting Ca0.80Ce0.20ZrTi1.60M0.40O7 (M =Fe3+ and Al3+). Materials were processed under 15 MPa uniaxial pressure, with heating/cooling rates of 100 degrees C/min to 1320 degrees C, maintained under vacuum. Despite moderate yield (> 80 wt%) of zirconolite-2M, a considerable Ce-rich perovskite phase was formed in both formulations, attributed to complete reduction of the Ce inventory to Ce3+, as determined by Ce L-3-edge XANES analysis. The composition charge balanced with Al3+ was favoured on the basis of lower accompanying perovskite fraction.