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为了研究钙钛矿结构的SrTiO3固化Y3+（90Y的模拟物）的化学稳定性，以Sr（NO3）2，TiO2及Y2O3粉体作为原料，按照化学计量比Sr1-1.5xYxTiO3（0≤x≤0.12）设计配方，采用高温固相法制备一系列固化体. 利用X射线衍射、扫描电镜和Raman对制备固化体的物相、结构和微观形貌进行分析表征，并对其抗浸出性能进行了研究. 结果表明：当xx≥0.08时，固化体中出现部分烧绿石相；固化体中的Sr2+，Y3+的浸出浓度随浸泡时间延长而增大，在浸泡42d时，Sr2+的最大浸出浓度为0.004μ·mL-1，Y3+的最大浸出浓度为0.02μ·mL-1.In order to study the stability of perovskite-type SrTiO3 used for immobilizing Y3+, Sr (NO3)2, TiO2 and Y2O3 are used as starting materials. The synthesized Y2O3-doped SrTiO3 can be generally represented as Sr1-1.5xYxTiO3 (0≤ x≤0.12) with the high temperature solid reaction. The phases, structures and microcosmic shapes of synthetic condensates are characterized by the X-ray diffraction, Raman and scanning electron microscopy, and long-term chemical stability is studied at 90 ℃. The results indicate that the phases of compounds change from perovskite to pyrocholre phase when the value of x is more than 0.08. The leaching rates of Sr2+ and Y3+ in waste form increase with the increase of immersion time. The highest leaching concentrations of Sr2+ and Y3+ for 42-day immersion are no more than 0.004 and 0.02 μg·mL-1, respectively.
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Keywords:
- perovskite-type /
- waster forms /
- leaching behavior
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[21] ASTM C 1285-02 2002 ASTM International (United States: West Conshohocken) pp122-124
[22] Liu X C, Gao F, Deng J P 2008 J. Inorg. Mater. 23 811(in Chinese)[刘向春, 高峰, 邓军平 2008 无机材料学报 23 811]
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[24] Wu X W, Liu X J 2008 Acta. Phys. Sin. 57 5500(in Chinese)[吴雪炜, 刘晓峻 2008 物理学报 57 5500]
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[1] Ojovan M I, Lee W E 2005 Netherlands (Amsterdam: Elsevier Science Publishers) pp213-215
[2] Yang J W, Luo S G, Li B J 2001 At. Enegy. Sci. Technol. 35 (suppl) 104 (in Chinese)[杨建文, 罗上庚, 李宝军 2001 原子能科学与技术(增刊) 35 104]
[3] Ewing R C 1999 National Academy of Science Colloquium 3 3432
[4] Jaffe J E, Renee M, Jiang W L 2012 Computat. Mater. Sci. 53 153
[5] Rao K R 2001 Current Sci. 12 1543
[6] Donald I W, Metcalfe B L, Taylor R N 1997 J. Mater. Sci. 32 5851
[7] Duan T, Lu X R, Liu X N 2012 Acta Phys. Sin. 61 212801(in Chinese)[段涛, 卢喜瑞, 刘晓楠 2012 物理学报 61 212801]
[8] Lu X R, Dong F Q, Hu S 2012 Acta Phys. Sin. 61 152401(in Chinese)[卢喜瑞, 董发勤, 胡淞 2012 物理学报 61 152401]
[9] van Ginhoven R M, Kovarik L, Jaffe J E, Arey B W 2012 J. Phys. Chem. C 116 16709
[10] Sassi M, Uberuaga B P, Stanek C R, Marks N A 2012 Phys. Rev. B 85 094104
[11] Stanek C R, Uberuag B P, Scott B L, Feller R K, Marks N A 2012 Current Opinion in Solid State and Materials Science 16 126
[12] Ewing R C 1999 Proc. Nat. Acad. Sci. USA 96 3432
[13] Ian Farnan, Herman Cho, William J W 2007 Nature 44 5190
[14] Das S, Poddar A, Roy B 2003 Journal of Alloys and Compounds 358 17
[15] Ewing R C, William J, Lian J 2004 J. Phys. Chem. 11 5950
[16] Vance E R 1994 Mater. Res. Soc. Bull. 19 28
[17] Ringwood A E 1988 North Holland (Armsterdam: Elsevier Science Publishers) pp 233-234
[18] Zhang R Z, Guo Z M, Jia G Y 2005 J. Chin. Ceramic Society. 33 1048(in Chinese)[张瑞珠, 郭志猛, 贾光耀 2005 硅酸盐学报 33 1048]
[19] Zhang R Z, Tong Y P, Yang L 2009 J. Nucl. Radiochemistry 31 237(in Chinese)[张瑞珠, 仝玉萍, 杨丽 2009 核化学与放射化学 31 237]
[20] Jaffe J E, van Ginhoven R M, Jiang W L 2012 Computation Materials Science 53 153
[21] ASTM C 1285-02 2002 ASTM International (United States: West Conshohocken) pp122-124
[22] Liu X C, Gao F, Deng J P 2008 J. Inorg. Mater. 23 811(in Chinese)[刘向春, 高峰, 邓军平 2008 无机材料学报 23 811]
[23] Shen Z Y, Li J F 2010 J. Chin. Ceram. Soc. 38 512(in Chinese)[沈宗洋, 李敬锋 2010 硅酸盐学报 38 512]
[24] Wu X W, Liu X J 2008 Acta. Phys. Sin. 57 5500(in Chinese)[吴雪炜, 刘晓峻 2008 物理学报 57 5500]
[25] Weber W H, Hass K C, Mcbrlde J R 1993 Phys. Rev. B 48 178
[26] Chen M J, Cui C L, Lu X R, Duan X R, Yang K, Zhang D 2011 At. Enegy. Sci. Technol. 45 14(in Chinese)[陈梦君, 崔春龙, 卢喜瑞, 段涛, 杨岩凯, 张东 2011 原子能科学与技术 45 14]
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