材料研究学报  2012, Vol. 26 Issue (3): 279-283

研究论文 本期目录 | 过刊浏览 |

粉末表面氧化对二氧化铀芯块烧结性能的影响

高家诚1,  吴曙芳1,  杨晓东2,   畅 欣2

1.重庆大学材料科学与工程学院 重庆 400045 2.宜宾核燃料元件公司 宜宾 644000

Effect of Pre–oxidation Powders on Sintering Properties of Uranium Dioxide Pellets

GAO Jiacheng1,  WU Shufang1,   YANG Xiaodong2,   CHANG Xin2

1.College of Material Science and Engineering, Chongqing University, Chongqing 400045 2.Yibin Nuclear Fuel Company, Yibin 644000

高家诚 吴曙芳 杨晓东 畅 欣. 粉末表面氧化对二氧化铀芯块烧结性能的影响[J]. 材料研究学报, 2012, 26(3): 279-283.
. Effect of Pre–oxidation Powders on Sintering Properties of Uranium Dioxide Pellets[J]. Chin J Mater Res, 2012, 26(3): 279-283.

摘要 参考文献 相关文章 Metrics 全文: PDF(882 KB)   摘要: 用SEM、XRD、BET和DSC--TG、热膨胀仪等观察了UO2粉末的形貌结构并研究粉末氧化前后的烧结性能, 分析了UO2粉末表面预氧化对二氧化铀芯块烧结性能的影响。结果表明, 240℃×8 h是UO2粉末预氧化表面改性的最佳工艺；粉末改性后表层为UO2+x和少量U3O7, 改性粉末压坯在氩气气氛中开始发生收缩的温度降低了530--600℃, 平均线收缩率提高了1倍；在本氩气保护条件下, 热膨胀试验后芯块的密度从8.52 g/cm3提高到9.44 g/cm3。采用本改性粉末, 在1300℃×5 h/N2+5%CO2--1500℃×1 h/H2批试烧结, 其密度达10.26 g/cm3, O/U比为2.013。 关键词 ： 无机非金属材料,  二氧化铀,  表面改性,  预氧化,  低温烧结     Abstract：The rationship between surface pre-oxidation and low-temperature sintering of uranium dioxide powders was studied in this paper. The oxidation processess of uranium dioxide powders in air were analyied by DSC-TG.Morphology, phases and properties of modified powders were tested by SEM, XRD and BET. Sintering properties of uranium dioxide powders before and after modification were compared and researched by thermal expansion instrument. The Results show that a process of 240℃×8h in air is a better process to surface modify uranium dioxide powders in our conditions. Beginning shrinkage temperature of modified powser pellets in Ar decresed from 1096-1171℃to 572-576℃, average line shrinking rate increased from 151.5266×10-6/K to 308.2275×10-6/K, density of the uranium dioxide pellets increased also from 8.52g/cm3 to 9.44g/cm3. Obviously, sintering densitying of modified powders is more rapid and higher than before. Density of the modified powders sintered pellets at 1300℃×5h/N2+5%CO2-1500℃×1h/H2 is 10.26 g/cm3。 Key words： inorganic non–metallic materials    uranium dioxide    surface modification    pre–oxidation    low–temperature 收稿日期: 2011-08-08      ZTFLH:  TL211   基金资助: 国家自然科学基金50874126资助项目。 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 高家诚 44.8K 链接本文: https://www.cjmr.org/CN/      或      https://www.cjmr.org/CN/Y2012/V26/I3/279 1 LI Rui, GAO Jiacheng, YANG Xiaodong, Development of sintering processes of uranium dioxide nuclear fuel pellets, Materials Review, 20(2), 91(2006) (李 锐, 高家诚, 杨晓东, 二氧化铀核燃料芯块烧结工艺的发展概况, 材料导报,  20(2), 91(2006)) 2 Sornay Phillppe, Bertrand Eric, Method for making a dense material for nuclear fuel, EP1971986, 2011–05–11 3 Song Kun Woo, Kang Ki Won, Kim Jong Hun, Method of producing large grained nuclear fuel pellet by controlling chrome cation solubility in UO2 lattice, US20100091933, 2010–04–15 4 Hallstadius Lars G, Lahoda Eward J, Use of boron or enriched boron 10 in UO2, EP1647993, 2007–05–30 5 H.H.S.Santana, G.Maier, U.W.Scherer, Analysis of mechanical strength in ceramic pellets of nuclear fuel, Radiation Effects and Defects in Solids, 164(5–6), 313(2009) 6 S.L.Reis, E.C.C.Souza, E.N.S.Muccillo, Solid solution formation, densification and ionic conductivity of Gd– and Sm–doped ceria, Solid State Ionics, 192(1), 172(2011) 7 Toshiyuki Usuki, Katsumi Yoshida, Toyohiko Yano, Fabrication and characterization of silicon nitride–based inert matrix fuels sintered with magnesium silicates, Progress in Nuclear Energy, 53(7),1078(2011) 8 Jiacheng Gao, Xiaodong Yang, Rui Li, Low–temperature sintering mechanism on uranium dioxide, Journal of Materials Science, 42(5), 936(2007) 9 GAO Jiacheng, YANG Xiaodong, LI Rui, Study on low temperature sintering mechanism of uranium dioxide pellets, Journal of Functional Materials, 37(8), 1298–1302(2006) (高家诚, 杨晓东, 李 锐, 二氧化铀芯块低温烧结机理的研究, 功能材料,  37(8), 1298(2006)) 10 WANG Liangfen, Research on creep properties of uranium dioxide at high temperature, Master Dissertation, Chongqing University(2008) (王良芬, 二氧化铀高温蠕变性能的研究, 硕士学位论文, 重庆大学(2008)) 11 YANG Xiaodong, GAO Jiacheng, WU Zhiming, Sintering of uranium dioxide pellets in low partial oxidative atmosphere,  Atom Energy Science and Technology, 40(6), 682(2006) (杨晓东, 高家诚, 伍志明, 二氧化铀芯块的低分压氧化性气氛烧结, 原子能科学技术,  40(6), 682(2006)) 12 E.Strom, Y.Cao, Y.M.Yao, Low temperature oxidation of Cr–alloyed MoSi2, Transactions of Nonferrous Metals Society of China, 17(6), 1282(2007) 13 GAO Jiacheng, WANG Yong, WU Shufang, Method on surface oxidation treatment of uranium dioxide powders, ZL200810069503.9, 2010–06–16 (高家诚, 王 勇, 吴曙芳, 二氧化铀粉末表面氧化处理的方法, ZL200810069503.9, 2010--06--16) 14 Peizhong Feng, Xuanhui Qu, Islam S. Humail, Xueli Du. Low–temperature oxidation behavior of MoSi2 powders, Journal of University of Science and Technology Beijing, 14, 558(2007) 15 ZHANG Lixiong, TAN Yun, Preparation and application of U3O8 powders, Atom Energy Science and Technology, 40(5), 574(2006) (张立雄, 谭 耘, 八氧化三铀粉末制备与利用, 原子能科学技术,  40(5), 574(2006)) 16 LI Huiqian, LIN Tao, GUO Zhimeng, WU Chengyi, LUO Ji, Singtering process of nano–tungsten powders, Journal of Beijing University of Science and Technology, 30(3), 272(2008) (李会谦, 林 涛, 郭志猛, 吴成义, 罗 骥, 纳米钨粉的烧结工艺, 北京科技大学学报,  30(3), 272(2008)) [1] 宋莉芳, 闫佳豪, 张佃康, 薛程, 夏慧芸, 牛艳辉. 碱金属掺杂MIL125的CO2 吸附性能[J]. 材料研究学报, 2023, 37(9): 649-654. [2] 邵鸿媚, 崔勇, 徐文迪, 张伟, 申晓毅, 翟玉春. 空心球形AlOOH的无模板水热制备和吸附性能[J]. 材料研究学报, 2023, 37(9): 675-684. [3] 任富彦, 欧阳二明. g-C3N4 改性Bi2O3 对盐酸四环素的光催化降解[J]. 材料研究学报, 2023, 37(8): 633-640. [4] 刘明珠, 樊娆, 张萧宇, 马泽元, 梁城洋, 曹颖, 耿仕通, 李玲. SnO2 作散射层的光阳极膜厚对量子点染料敏化太阳能电池光电性能的影响[J]. 材料研究学报, 2023, 37(7): 554-560. [5] 李延伟, 罗康, 姚金环. 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