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Densification behavior and properties of Li4SiO4 ceramic breeder with the addition of SiC as a sintering aid

文献类型：期刊论文

作者Tan, Guangfan1; Hu, Xin1; Cai, Liang1; Dong, Xiaoxu1; Yang, Xiuhong2; Zhang, Yingchun1
刊名CERAMICS INTERNATIONAL
出版日期2023-02-15
卷号49期号:4页码:6843-6855
ISSN号0272-8842
关键词Li4SiO4 SiC powder Crushing load Thermal conductivity Activation energy
DOI10.1016/j.ceramint.2022.10.220
英文摘要Lithium orthosilicate (Li4SiO4) is regarded as a vital tritium breeder candidate due to its favorable properties, such as high lithium contents, superior tritium release behavior, and irradiation stability. However, the poor crushing load and low thermal conductivity of the Li4SiO4 ceramic pebbles fabricated via existing methods will lead to the blocking of the tritium release channels, giving rise to thermal stress concentration. To overcome the above shortcomings, the SiC was employed as sintering aid to improve Li4SiO4 ceramic pebbles via simple wet method in this paper. The effects of SiC content on the shrinkage, internal structure evolution, and crushing load of the Li4SiO4 ceramic pebbles are comprehensively investigated, and the densification process is analyzed in detail. It was found that the addition of SiC improves the crushing load (54 N) significantly owing to decreasing the densification activation energy. Moreover, the Li4SiO4 ceramic pebbles with excess Li2CO3 further displays excellent properties at 800 degrees C, such as the relative density of 90.3%, the crushing load of 65.3 N, and the thermal conductivity of 1.97 W/(m.K) respectively, which is much higher than that of traditional methods (at least 1000 degrees C). The Li4SiO4 ceramic pebbles with homogeneous micro-pore distribution, the porosity of 7.3% were further measured by using the X-ray computer tomography technique. Therefore, this proposed tactic has great prospects for the service performance of tritium breeding materials in the blanket.
WOS关键词TRITIUM RELEASE PROPERTIES ; ENHANCED CRUSH LOAD ; PEBBLE FABRICATION ; LI2TIO3 ; CONDUCTIVITY ; STRENGTH ; GRAIN
资助项目National Natural Science Foundation of China[51972018] ; China National Key R D Program[2019YFC1907501]
WOS研究方向Materials Science
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000920973400001
资助机构National Natural Science Foundation of China ; China National Key R D Program
源URL[http://ir.ipe.ac.cn/handle/122111/56926]  
通讯作者Zhang, Yingchun
作者单位1.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, 30 Xueyuan Rd, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Tan, Guangfan,Hu, Xin,Cai, Liang,et al. Densification behavior and properties of Li4SiO4 ceramic breeder with the addition of SiC as a sintering aid[J]. CERAMICS INTERNATIONAL,2023,49(4):6843-6855.
APA Tan, Guangfan,Hu, Xin,Cai, Liang,Dong, Xiaoxu,Yang, Xiuhong,&Zhang, Yingchun.(2023).Densification behavior and properties of Li4SiO4 ceramic breeder with the addition of SiC as a sintering aid.CERAMICS INTERNATIONAL,49(4),6843-6855.
MLA Tan, Guangfan,et al."Densification behavior and properties of Li4SiO4 ceramic breeder with the addition of SiC as a sintering aid".CERAMICS INTERNATIONAL 49.4(2023):6843-6855.

入库方式： OAI收割

来源：过程工程研究所

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