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材料导报  2022, Vol. 36 Issue (7): 21020054-5    https://doi.org/10.11896/cldb.21020054
  无机非金属及其复合材料 |
Nd2O3对钼酸钙-钙钛锆石硼硅酸盐玻璃陶瓷结构和性能的影响
连启会1, 张行泉2, 霍冀川2, 吴浪1, 张壮森1
1 西南科技大学材料科学与工程学院, 四川 绵阳 621010
2 西南科技大学分析测试中心,四川 绵阳 621010
Effect of Nd2O3 on Structure and Properties of Powellite-Zirconolite Borosilicate Glass Ceramics
LIAN Qihui1, ZHANG Xingquan2, HUO Jichuan2, WU Lang1, ZHANG Zhuangsen1
1 School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
2 Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
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摘要 针对乏燃料后处理产生的高放废液中具有镧系元素(Ln)和过渡金属元素(Mo)含量较高的特点,本实验开发了一种以钼酸钙和钙钛锆石为主晶相的硼硅酸盐玻璃陶瓷固化体,并研究了Nd2O3含量(0%~5%,摩尔分数,下同)对玻璃陶瓷固化体的物相组成、形貌结构和抗浸出性能的影响。结果表明,Nd2O3含量为 0%~3%的固化体仅含均匀分布在玻璃基质中的钼酸钙和钙钛锆石两种晶相;随Nd2O3含量增加,固化体的BO4向BO3转变,玻璃陶瓷固化体的体积密度和氧堆积密度逐渐增加,结构变得更加致密;产品一致性测试(PCT)结果表明,28 d后含Nd2O3玻璃陶瓷的Mo浸出率相较于不含Nd2O3玻璃陶瓷的Mo浸出率(LR)低了约两个数量级,其中Nd2O3含量为3%样品的LRSiLRCaLRMoLRNd分别约为1.90×10-3 g·m-2·d-1、6.38×10-4 g·m-2·d-1、8.27×10-5 g·m-2·d-1和1.42×10-6 g·m-2·d-1
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连启会
张行泉
霍冀川
吴浪
张壮森
关键词:  高放废液  玻璃陶瓷  钼酸钙  钙钛锆石  抗浸出性能    
Abstract: In this paper, a borosilicate glass-ceramic waste form with powellite and zirconolite as the main crystalline phases was developed, for the high content of lanthanide (Ln) and transition metal (Mo) in high-level liquid waste arising from spent nuclear fuel reprocessing, and the phase composition, structure and leaching properties of glass-ceramic forms with content of 0mol%—5mol%Nd2O3 were investigated. The results show that two major target phases, powellite and zirconolite, are observed for the glass-ceramics with 0mol%—3mol% Nd2O3, which are homogenously distributed in the glass matrix. With Nd2O3 addition, the BO4 group transformed to BO3, bulk density and oxygen packing density gra-dually increased, and the structure became denser. PCT result shows that after 28 d, the leaching rate of glass-ceramic incorporated Nd2O3 reduced by about two orders of magnitude lower than that of those without Nd2O3 glass ceramic, and for the sample with 3 mol% Nd2O3, of which LRSi, LRCa, LRMo and LRNd are approximately 1.90×10-3 g·m-2·d-1, 6.38×10-4 g·m-2·d-1, 8.27×10-5 g·m-2·d-1and 1.42×10-6 g·m-2·d-1.
Key words:  high-level liquid waste    glass-ceramic    powellite    zirconolite    chemical durability
发布日期:  2022-04-07
ZTFLH:  TQ171.9  
基金资助: 国家自然科学基金(11775182)
通讯作者:  zxqli@163.com; lang.wu@163.com   
作者简介:  连启会,2017年毕业于绵阳师范学院,获理学学士学位。2020年毕业于西南科技大学,获理学硕士学位。现为西南科技大学材料科学与工程专业博士研究生,在吴浪教授的指导下进行研究。主要研究领域为放射性废物处理材料。主持西南科技大学研究生创新基金重点项目1项(已结题),发表SCI论文1篇。
吴浪,教授,博士研究生导师。2008年毕业于四川大学,获工学博士学位。2008年至今在西南科技大学材料科学与工程学院从事科研教学工作。2014年6月至12月在美国加州大学圣地亚哥分校(University of California, San Diego)作访问学者。主要从事特种陶瓷、玻璃及功能材料的制备、结构、性能及器件应用研究,先后承担国家自然科学基金、企业横向合作项目、四川省教育厅重点项目等15项,其中主持8项(含国家自然科学基金项目2项),主研7项。在国内外期刊上已发表论文35篇,被SCI收录20篇,另有11篇被EI收录;授权发明专利6项;参编专著1部。
张行泉,副教授,硕士研究生导师。2011年7月毕业于哈尔滨工业大学,获理学博士学位。同年就职于西南科技大学分析测试中心至今,主要从事无机非金属氧化物功能材料及核废物处理材料方面的研究工作。主持或参与国家自然科学基金项目、国防军工项目、四川省教育厅项目、国防重点学科实验室开放基金、中国工程物理研究院外协项目及西南科技大学“龙山学术人才科研支持计划”重点支持等项目10余项,发表学术论文26篇,授权专利1项。
引用本文:    
连启会, 张行泉, 霍冀川, 吴浪, 张壮森. Nd2O3对钼酸钙-钙钛锆石硼硅酸盐玻璃陶瓷结构和性能的影响[J]. 材料导报, 2022, 36(7): 21020054-5.
LIAN Qihui, ZHANG Xingquan, HUO Jichuan, WU Lang, ZHANG Zhuangsen. Effect of Nd2O3 on Structure and Properties of Powellite-Zirconolite Borosilicate Glass Ceramics. Materials Reports, 2022, 36(7): 21020054-5.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21020054  或          http://www.mater-rep.com/CN/Y2022/V36/I7/21020054
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