Fabrication of CeO2 ceramic spheres as a surrogate of nuclear fuel by an improved microwave-assisted rapid internal gelation process

doi:10.1016/j.ceramint.2018.01.090

	Fabrication of CeO2 ceramic spheres as a surrogate of nuclear fuel by an improved microwave-assisted rapid internal gelation process
	Tian, Wei1,2 ; Guo, Hangxu 1,2; Yin, Xiaojie1 ; Chen, Denglei 1; Qin, Zhi1 ; Pouchon, M. A.3
刊名	CERAMICS INTERNATIONAL
	2018-04-15
卷号	44 页码:6739-6746
关键词	Ceramic CeO2 spheres In-situ instant mixing Microwave-assisted rapid internal gelation Nuclear fuel
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2018.01.090
英文摘要	CeO2 is a surrogate of PuO2 in nuclear fuel development. Uniform sized ceramic CeO2 spheres were fabricated by an improved internal gelation process which combined the in-situ instant mixing of room-temperature precursor solutions with microwave-assisted internal gelation. Chemical kinetics investigations showed that the gelation process sped up as the[HMTA]/[Ce4+] ratio, [OH-]/[Ce4+] ratio and temperature increased. However, to avoid cracking during the sintering process, the [HMTA]/[Ce4+] ratio should be limited at low value while [OH-]/ [Ce4+] ratio should be sufficiently high. Besides, pressured water treatment was adopted to wipe off impurities in the gelled spheres before sintering. The microstructure and morphology of the prepared ceramic CeO2 spheres were also investigated. The improved microwave-assisted internal gelation process greatly simplifies the conventional sol-gel process and avoids secondary organic radioactive waste. It will be a potential method for the fabrication of MAs and Pu-containing ceramic nuclear fuel spheres in glove-box in future.
资助项目	CAS Strategic Priority Research Program[XDA03010402] ; Chinese National Nature Science Fund[91326203] ; nuclear chemistry laboratory of IMP ; material center of IMP
WOS关键词	GEL MICROSPHERE PELLETIZATION ; ZIRCONIA MICROSPHERES ; CERIA ; DROPLETS ; URANIUM ; PELLETS ; POWDER ; YTTRIA
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000427215100124
资助机构	CAS Strategic Priority Research Program ; Chinese National Nature Science Fund ; nuclear chemistry laboratory of IMP ; material center of IMP
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/47458]
专题	近代物理研究所_实验物理中心
通讯作者	Qin, Zhi
作者单位	1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Paul Scherrer Inst, CH-5232 Villigen, Switzerland
推荐引用方式 GB/T 7714	Tian, Wei,Guo, Hangxu,Yin, Xiaojie,et al. Fabrication of CeO2 ceramic spheres as a surrogate of nuclear fuel by an improved microwave-assisted rapid internal gelation process[J]. CERAMICS INTERNATIONAL,2018,44:6739-6746.
APA	Tian, Wei,Guo, Hangxu,Yin, Xiaojie,Chen, Denglei,Qin, Zhi,&Pouchon, M. A..(2018).Fabrication of CeO2 ceramic spheres as a surrogate of nuclear fuel by an improved microwave-assisted rapid internal gelation process.CERAMICS INTERNATIONAL,44,6739-6746.
MLA	Tian, Wei,et al."Fabrication of CeO2 ceramic spheres as a surrogate of nuclear fuel by an improved microwave-assisted rapid internal gelation process".CERAMICS INTERNATIONAL 44(2018):6739-6746.