不同晶核剂对硼硅酸盐钙钛锆石固化体析晶行为及化学稳定性的影响

doi:10.11896/j.issn.1005-023X.2018.22.024

Abstract
Figure/Table
References
Related Citation (1)

Download:

Full Text ( PDF ) (2521KB)
Export: BibTeX | EndNote (RIS)

Abstract The zirconolite-based borosilicate glass-ceramics containing 24wt% simulated nuclear waste was prepared by the “one-step” thermal treatment, from the perspective of crystallization kinetics, the action of the solidified bodies’ crystallization behavior and the effect of chemical stability under different nucleation agent (Fe₂O₃, Cr₂O₃, P₂O₅, CaF₂) were investigated. As a result, the addition of Cr₂O₃ has led to the precipitation of tabular CaZrTi₂O₇ crystals and the energy E of crystallization activation decreased from 218 kJ/mol to 128 kJ/mol, and promoting the simulated nuclide remaining in the glass matrix to fuse into the precipitated crystal phase, yet other nucleation agents did not produce obvious effect. The MCC-1 experiment of glass-ceramics showed that the excellent leaching resistance and chemical stability under the impact of Cr₂O₃, and the normalized leaching rate of Ce below 10^-7 g·m^-2·d^-1 after 7 d.

Key words： glass-ceramics solidification zirconolite chemical stability devitrification

Published: 21 December 2018

CLC number:

TQ171

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	GENG Andong
	ZHU Yongchang
	CUI Zhu
	ZHANG Hao
	ZHU Hanzhen
	HAN Xu
	HUO Jichuan

Cite this article:

GENG Andong,ZHU Yongchang,CUI Zhu, et al. The Effects of Different Nucleation Agents on the Crystallization Behavior and Chemical Stability of the Zirconolite-based Borosilicate Glass-Ceramics[J]. Materials Reports, 2018, 32(22): 3979-3983.

URL:

http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.22.024 OR http://www.mater-rep.com/EN/Y2018/V32/I22/3979

1 罗上庚.放射性废物概论[M].北京:原子能出版社,2003.
2 Liao Q L, Liao C J, Xiang G H, et al. Effect of Al₂O₃ on monazite glass-ceramics wasteform[J]. Atomic Energy Science and Techno-logy,2014,48(1):23(in Chinese).
廖其龙,廖春娟,向光华,等.Al₂O₃对独居石玻璃陶瓷固化体的影响[J].原子能科学技术,2014,48(1):23.
3 卢喜瑞.钆锆烧绿石固化锕系核素机理及稳定性[M].北京:科学出版社,2016.
4 Zhang Y, Gregg D J, Kong L, et al. Zirconolite glass-ceramics for plutonium immobilization: The effects of processing redox conditions on charge compensation and durability[J]. Journal of Nuclear Materials,2017, 490:238.
5 Vance E R, Ball C J, Day R A, et al. Actinide and rare earth incorporation into zirconolite[J]. Journal of Alloys & Compounds,1994,213-214(1):406.
6 Wu L, Li Y, Teng Y, et al. Preparation and characterization of borosilicate glass-ceramics containing zirconolite and titanite crystalline phases[J]. Journal of Non-Crystalline Solids,2013,380(5):123.
7 Lin J S, Shen P. Fabrication of CaO-ZrO₂-TiO₂-Al₂O₃-B₂O₃-SiO₂ glasses and glass-ceramics[J]. Journal of Non-Crystalline Solids,1996,204(2):135.
8 何峰.微晶玻璃的制备与应用[M].北京:化学工业出版社,2017.
9 Loiseau P, Caurant D, Majerus O, et al. Fillet. craystallization study of (TiO₂,ZrO₂)-rich SiO₂-Al₂O₃-CaO glass-PartⅠ preparation and characterization of ziconolite-based glass-ceramics[J]. Journal of Meterials Science,2003,38(4):843.
10 Bansal N P, Doremus R H, Bruce A J, et al. Kinetics of crystallization of ZrF₄-BaF₂-LaF₃ glass by differential scanning calorimetrys[J]. Journal of the American Ceramic Society,1983,66(4):233.
11 Kuang J Z. Effect of cooling-heating on crystallization kinetics of CaO-Al₂O₃-SiO₂ system glass[J]. Transactions of Materials and Heat Treatment,2012,3(1):37.
12 Chu H R, Ruan J S, Zhang Y. Research progress of chemical durability assessment methods for high level radiation glass[J]. Shandong Chemical Industry,2017,46(16):65(in Chinese).
褚浩然,阮佳晟,张禹.高放玻璃固化体化学耐久性评估方法研究进展[J].山东化工,2017,46(16):65.
13 Neilson R M J, Nicolaras H, Lai J, et al. Leachability of solidified. Low-level radioactive waste forms[J]. Transactions of the American Nuclear Society,1978,30(11):97.
14 Lv C X. The study of crystallization process of ZrO₂[D]. Lanzhou: Lanzhou University of Technology,2010(in Chinese).
吕彩霞.氧化锆晶化过程的研究[D].兰州:兰州理工大学,2010.
15 Li P, Ding X G, Yang H, et al. Crystallization and leaching resis-tance performance of zirconolite-based glass-ceramics[J]. Journal of Silicate,2012,40(2):324(in Chinese).
李鹏,丁新更,杨辉,等.钙钛锆石玻璃陶瓷体的晶化和抗浸出性能[J].硅酸盐学报,2012,40(2):324.
16 Kong L, Wei T, Zhang Y, et al. Phase evolution and microstructure analysis of CaZrTi₂O₇, zirconolite in glass[J]. Ceramics International,2018,44:6285.
17 Li P. The structure control and properties of simulated radionuclide cerium ions doped glass/glass-ceramics matrix[D]. Hangzhou: Zhejiang University,2013(in Chinese).
李鹏.掺杂模拟核素铈离子的玻璃/玻璃陶瓷固化体的结构控制与性能研究[D].杭州:浙江大学,2013.