Effect of gamma-ray irradiation on thermal conductivity of tritium breeding material Li2TiO3

doi:10.1016/j.ceramint.2020.12.276

	Effect of gamma-ray irradiation on thermal conductivity of tritium breeding material Li2TiO3
	Ji, Baolong 1,2; Gu, Shouxi 1,2; Qi, Qiang 1,4; Zhu, Qingjun 1; Zhang, Yingchun 3; Zhou, Haishan 1; Luo, Guang-Nan 1,2
刊名	CERAMICS INTERNATIONAL
	2021-04-15
卷号	47
关键词	Tritium breeders Irradiation Defects Thermal Conductivity Electron Paramagnetic Resonance EasySpin
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2020.12.276
通讯作者	Qi, Qiang(qiqiang@ipp.ac.cn)
英文摘要	Thermal performance is one of the important parameters for tritium breeders in D-T fusion reactor. It has a certain significance to study the effect of irradiation damages on the thermal conductivity for enriching the database. gamma-ray irradiation has been adopted due to its presence in the reactor and uniform defect distribution similar to neutron irradiation. The results of XRD and Raman indicate that the samples are damaged by irradiation. The irradiation defects have been studied by Electron Paramagnetic Resonance (EPR or ESR). E'-center and Ti3+ are determined as the main defects introduced in irradiated Li2TiO3. The spatial distribution of defects introduced in Li2TiO3 by gamma-ray irradiation is uniform calculated by Fluka. The relative concentrations of E'-center, A-centers and Ti3+ have been obtained by EasySpin simulation. The thermal diffusivity at room temperature decreases as irradiation dose increases. However, there is no obvious change in trends for thermal conductivity. For isochronal annealing experiments, it can be found that the thermal conductivity changes by the effects of E'-center and Ti3+. E'-center gradually decreases with the increase of the annealing temperature. The comprehensive analysis of experimental results and EasySpin fitting results has been performed. According to analysis and comparison with other reports, it is indicated that E'-center has negative effects on thermal conductivity, while the presence of Ti3+ plays a major role in enhancing the thermal conductivity. Based on the work, the suggestion for improving thermal conductivity by adopting additional Ti3+ has been proposed.
资助项目	National MCF Energy RD Program[2018YFE0307103] ; National Natural Science Foundation of China[11605230] ; National Natural Science Foundation of China[51372017]
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000631971100002
资助机构	National MCF Energy RD Program ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120890]
专题	中国科学院合肥物质科学研究院
通讯作者	Qi, Qiang
作者单位	1.Chinese Acad Sci, HFIPS, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, 30 Xueyuan Rd, Beijing 100083, Peoples R China 4.Anhui Prov Key Lab Special Welding Technol, Huainan 232000, Peoples R China
推荐引用方式 GB/T 7714	Ji, Baolong,Gu, Shouxi,Qi, Qiang,et al. Effect of gamma-ray irradiation on thermal conductivity of tritium breeding material Li2TiO3[J]. CERAMICS INTERNATIONAL,2021,47.
APA	Ji, Baolong.,Gu, Shouxi.,Qi, Qiang.,Zhu, Qingjun.,Zhang, Yingchun.,...&Luo, Guang-Nan.(2021).Effect of gamma-ray irradiation on thermal conductivity of tritium breeding material Li2TiO3.CERAMICS INTERNATIONAL,47.
MLA	Ji, Baolong,et al."Effect of gamma-ray irradiation on thermal conductivity of tritium breeding material Li2TiO3".CERAMICS INTERNATIONAL 47(2021).