Sintering of monoclinic SrAl2Si2O8 ceramics and their Sr immobilization

Jie Luo; Xin Li; Fu-jie Zhang; Song Chen; Ding Ren

doi:10.1007/s12613-020-2056-6

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Jie Luo, Xin Li, Fu-jie Zhang, Song Chen, and Ding Ren, Sintering of monoclinic SrAl2Si2O8 ceramics and their Sr immobilization, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2056-6

Cite this article as:

Jie Luo, Xin Li, Fu-jie Zhang, Song Chen, and Ding Ren, Sintering of monoclinic SrAl₂Si₂O₈ ceramics and their Sr immobilization, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2056-6

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Research Article

Sintering of monoclinic SrAl₂Si₂O₈ ceramics and their Sr immobilization

+ Author Affiliations

Corresponding author:
Ding Ren E-mail: rending2k@scu.edu.cn
Received: 3 December 2019; Revised: 28 March 2020; Accepted: 30 March 2020; Available online: 3 April 2020

Abstract

Abstract

Monoclinic SrAl₂Si₂O₈ ceramics for Sr immobilization were prepared by a liquid-phase sintering method. The sintering temperature, mineral phase composition, microstructure, flexural strength, bulk density, and Sr ion leaching characteristics of the SrAl₂Si₂O₈ ceramics were investigated. A crystalline monoclinic SrAl₂Si₂O₈ phase formed through liquid-phase sintering at 1223 K. The introduction of four flux agents (B₂O₃, CaO·2B₂O₃, SrO·2B₂O₃, and BaO·2B₂O₃) to the SrAl₂Si₂O₈ ceramics not only reduced the densification temperature and decreased the volatilization of Sr during high-temperature sintering but also impacted the mechanical properties of the ceramics. Product consistency tests showed that the leaching concentration of Sr ions in the sample with flux agent B₂O₃ was the lowest, whereas that of Sr ions in the sample with flux agent BaO·2B₂O₃ was the highest. These results show that the leaching concentration of Sr ions depends largely on the amorphous phase in the ceramics. Meanwhile, the formation of mineral analog ceramics containing Sr is an important factor to improve Sr immobilization.
- low-temperature liquid-phase sintering,
- strontium immobilization,
- monoclinic strontium feldspar,
- flux agent

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References(25)

References

[1]	T. Hijikata, M. Sakata, H. Miyashiro, K. Kinoshita, T. Higashi, and T. Tamai, Development of pyrometallurgical partitioning of actinides from high-level radioactive waste using a reductive extraction step, Nucl. Technol., 115(1996), No. 1, p. 114. doi: 10.13182/NT96-A35280
[2]	G.R. Choppin, Actinide speciation in the environment, J. Radioanal. Nucl. Chem., 273(2007), No. 3, p. 695. doi: 10.1007/s10967-007-0933-3
[3]	M.Y. Alyapyshev, V.A. Babain, and Y.A. Ustynyuk, Recovery of minor actinides from high-level wastes: Modern trends, Russ. Chem. Rev., 85(2016), No. 9, p. 943. doi: 10.1070/RCR4589
[4]	C.M. Jantzen, W.E. Lee, and M.I. Ojovan, Radioactive waste conditioning, immobilization, and encapsulation processes and technologies: Overview and advances, [in] W.E. Lee, M.I. Ojovan, and C.M. Jantzen, eds., Radioactive Waste Management and Contaminated Site Clean-up: Processes, Technologies and International Experience, Woodhead Publishing, Cambridge, 2013, p. 171.
[5]	R.S. Forsyth and L.O. Werme, Spent fuel corrosion and dissolution, J. Nucl. Mater., 190(1992), p. 3. doi: 10.1016/0022-3115(92)90071-R
[6]	I.W. Donald, B.L. Metcalfe, and R.N.J. Taylor, The immobilization of high level radioactive wastes using ceramics and glasses, J. Mater. Sci., 32(1997), No. 22, p. 5851. doi: 10.1023/A:1018646507438
[7]	L. Wang and T.X. Liang, Ceramics for high level radioactive waste solidification, J. Adv. Ceram., 1(2012), No. 3, p. 194. doi: 10.1007/s40145-012-0019-8
[8]	W.E. Lee, M.I. Ojovan, M.C. Stennett, and N.C. Hyatt, Immobilization of radioactive waste in glasses, glass composite materials and ceramics, Adv. Appl. Ceram., 105(2006), No. 1, p. 3. doi: 10.1179/174367606X81669
[9]	E.R. Vance, B.D. Begg, and D.J. Gregg, Immobilization of high-level radioactive waste and used nuclear fuel for safe disposal in geological repository systems, [in] M.J. Apted and J. Ahn, eds., Geological Repository Systems for Safe Disposal of Spent Nuclear Fuels and Radioactive Waste, 2nd ed., Woodhead Publishing, Cambridge, 2017, p. 269.
[10]	C. Ferone, B. Liguori, A. Marocco, S. Anaclerio, M. Pansini, and C. Colella, Monoclinic (Ba, Sr)-celsian by thermal treatment of (Ba, Sr)-exchanged zeolite A, Microporous Mesoporous Mater., 134(2010), No. 1-3, p. 65. doi: 10.1016/j.micromeso.2010.05.008
[11]	C.M. López-Badillo, J. López-Cuevas, C.A. Gutiérrez-Chavarría, J.L. Rodríguez-Galicia, and M.I. Pech-Canul, Synthesis and characterization of BaAl₂Si₂O₈ using mechanically activated precursor mixtures containing coal fly ash, J. Eur. Ceram. Soc., 33(2013), No. 15-16, p. 3287. doi: 10.1016/j.jeurceramsoc.2013.05.014
[12]	Y. Kobayashi and M. Inagaki, Preparation of reactive Sr-celsian powders by solid-state reaction and their sintering, J. Eur. Ceram. Soc., 24(2004), No. 2, p. 399. doi: 10.1016/S0955-2219(03)00215-2
[13]	B. Liguori, C. Ferone, S. Anaclerio, and C. Colella, Monoclinic Sr-celsian by thermal treatment of Sr-exchanged zeolite A, LTA-type framework, Solid State Ionics, 179(2008), No. 40, p. 2358. doi: 10.1016/j.ssi.2008.09.006
[14]	S. Chen and D.G. Zhu, Low-temperature sintering behaviour and properties of monoclinic-SrAl₂Si₂O₈ ceramics prepared via an aqueous suspension milling process, J. Mater. Sci.:Mater. Electron., 27(2016), No. 11, p. 11127. doi: 10.1007/s10854-016-5230-x
[15]	Z.H. Xu, Z. Jiang, D.D. Wu, X. Peng, Y.H. Xu, N. Li, Y.J. Qi, and P. Li, Immobilization of strontium-loaded zeolite A by metakaolin based-geopolymer, Ceram. Int., 43(2017), No. 5, p. 4434. doi: 10.1016/j.ceramint.2016.12.092
[16]	ASTM International, ASTM Standard C1285-14: Standard Test Methods for Determining Chemical Durability of Nuclear, Hazardous, and Mixed Waste Glasses and Multiphase Glass Ceramics: The Product Consistency Test (PCT), ASTM International, West Conshohocken, 2014.
[17]	E.M. Levin, H.F. McMurdie, and F.P. Hall, Phase Diagrams for Ceramists, The American Ceramic Society, Columbus, 1956.
[18]	E.M. Levin and H.F. McMurdie, The system BaO–B₂O₃, J. Am. Ceram. Soc., 32(1949), No. 3, p. 99. doi: 10.1111/j.1151-2916.1949.tb18932.x
[19]	H. Witzmann and G. Herzog, Luminescence-optical behaviour of alkaline earth borate luminophors, Z. Phys. Chem., 225(1964), p. 197.
[20]	R.M. German, S. Farooq, and C.M. Kipphut, Kinetics of liquid sintering, Mater. Sci. Eng. A, 105-106(1988), p. 215. doi: 10.1016/0025-5416(88)90499-5
[21]	S. Chen, D.G. Zhu, and X.S. Cai, Low-temperature densification sintering and properties of monoclinic-SrAl₂Si₂O₈ ceramics, Metall. Mater. Trans. A, 45(2014), No. 9, p. 3995. doi: 10.1007/s11661-014-2344-8
[22]	S. Rajesh, H. Jantunen, M. Letz, and S. Pichler-Willhelm, Low temperature sintering and dielectric properties of alumina-filled glass composites for LTCC applications, Int. J. Appl. Ceram. Technol., 9(2012), No. 1, p. 52. doi: 10.1111/j.1744-7402.2011.02684.x
[23]	S.D. Ross and M. Finkelstein, Barium Borate Preparation, United States Patent, Appl. 4897249, 1990.
[24]	S. Chen, D.G. Zhu, P.Q. Sun, and H.L. Sun, Sintering behavior and dielectric properties of SrB₂Si₂O₈ ceramics, J. Mater. Sci.:Mater. Electron., 24(2013), No. 11, p. 4593. doi: 10.1007/s10854-013-1448-z
[25]	H. Scholze, Glass: Nature, Structure, and Properties, Springer, New York, 1991.