Rapid synthesis of Gd2Zr2O7 glass‐ceramics using spark plasma sintering
Rapid synthesis of Gd2Zr2O7 glass‐ceramics using spark plasma sintering
复制标题
放电等离子烧结快速合成Gd2Zr2O7玻璃陶瓷
DOI：
10.1111/jace.16658
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发表时间：
2019
影响因子：
3.9
通讯作者：
Xirui Lu
中科院分区：
文献类型：
--
作者：
Xiaoyan Shu;Shunzhang Chen;Chenxi Hou;Yi Xie;Haibin Zhang;Bingsheng Li;Yushan Yang;Xiaoqiang Wang;Linyan Li;Xirui Lu
玻璃陶瓷是高放废物固定化的可能基质。Gd2Zr2O7玻璃陶瓷基质使用放电等离子体烧结（SPS）方法在5分钟内成功合成。使用X射线衍射、拉曼和透射电子显微镜研究了随烧结温度的相变。结果表明，当烧结温度低于1800°C时，样品中主要存在缺陷萤石相。玻璃相在1850°C以上迅速增加。在1900°C时，无定形结构成为主体，纳米级晶体分散在块体中。随着玻璃相的增加，晶界变得几乎不可分辨。综述了Gd_2Zr_2O_7的终相与合成温度范围及相应工艺的关系。采用SPS烧结法，将烧结温度提高到1850°C以上，可获得Gd2Zr2O7微晶玻璃。
Glass‐ceramics are possible host matrix for high level waste immobilization. The Gd2Zr2O7 glass‐ceramic matrix was successfully synthesized using spark plasma sintering (SPS) method in 5 minutes. The phase transition with sintering temperature was studied using X‐ray diffraction, Raman and transmission electron microscopy. It revealed that samples kept a main defected fluorite phase as being sintered below 1800°C. Glass phase increased rapidly beyond 1850°C. The amorphous structure became the main body at 1900°C, with nanoscale crystal scattered in the bulk. With the increase of glass phase, the grain boundary became almost indistinguishable. The relationship between the final phase of Gd2Zr2O7 with its synthetic temperature range and corresponding technology was reviewed. Gd2Zr2O7 glass‐ceramics could be acquired by extending the sintering temperature beyond 1850°C using SPS method.