Phase evolution and microstructure of new Sr0.5Zr2(PO4)(3)-NdPO4 composite ceramics prepared by one-step microwave sintering
Phase evolution and microstructure of new Sr0.5Zr2(PO4)(3)-NdPO4 composite ceramics prepared by one-step microwave sintering
复制标题
一步微波烧结制备新型Sr0.5Zr2(PO4)(3)-NdPO4复合陶瓷的相演化及显微结构
DOI：
10.1016/j.ceramint.2020.05.035
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发表时间：
2020
影响因子：
5.2
通讯作者：
Yang Shiyuan
中科院分区：
文献类型：
--
作者：
Zhan Lei;Wang Junxia;Wang Jin;Zhang Xue;Wei Yufeng;Yang Shiyuan
Sodium Zirconium Phosphate (NaZr2(PO4)3, hereinafter NZP) and monazite are both potential materials for immobilization of nuclear waste. In this work, novel (1-x)Sr0.5Zr2(PO4)3-xNdPO4composite ceramics (x= 0, 0.2, 0.4, 0.6, 0.8, and 1.0) for simultaneously immobilizing the simulated fission product (FP) Sr and trivalent minor actinide (MA) Nd were prepared by one-step microwave sintering technique, in which Sr and Nd were immobilized into NZP and monazite type structures, respectively. The phase evolution and microstructure of the samples were investigated by X-ray diffraction (XRD), Raman, and backscattering scanning electron microscopy (BSE). The results showed that the expected composite ceramics were successfully obtained by one-step microwave sintering at 1050 °C for 2 h. The as-prepared samples consisted of Sr0.5Zr2(PO4)3and NdPO4phases, and the content of the two phases varied regularly asxchanged, generally conforming to the designed nominal chemical composition. Importantly, the composite ceramics presented the homogenous and dense microstructure. The relative density of the composite ceramics was more than 95%, meanwhile, the Vickers-hardness of the samples was higher than 600 MPa. It was indicated that NZP-monazite type composite ceramics could be a potential matrix for the simultaneous immobilization of actinide and fission product.
