Gd_(2-x)Nd_xZr_2O_7(Nd=An(Ⅲ),0≤x≤2.0)模拟固化体固溶量与其物相、密度、硬度之间的关系

详细信息    查看全文 | 推荐本文 |

英文篇名：Relation of containment capacity with phase composition,density and Vickers hardness of simulated waste forms Gd_(2-x)Nd_xZr_2O_7(Nd = An(Ⅲ),0≤x≤2.0) 作者：段涛 ; 卢喜瑞 ; 刘小楠 ; 竹文坤 ; 黄叶菊 英文作者：Duan Tao~(1)2)) Lu Xi-Rui~(2)) Liu Xiao-Nan~(2)) ZhuWen-Kun~(2)) Huang Ye-Ju~(2)) 1)(Fundament on Nuclear Waste and Environmental Security Laboratory,Southwest University of Science and Technology, Mianyang 621010,China) 2)(Laboratory for Extreme Conditions Matter Properties,Southwest University of Science and Technology,Mianyang 621010,China) 关键词：钆锆烧绿石 ; 固化体 ; 固溶量 ; 相组成 英文关键词：Gd_2Zr_2O_7 pyrochlore;;waste forms;;containment capacity;;phase composition 中文刊名：WLXB 英文刊名：Acta Physica Sinica 机构：西南科技大学核废物与环境安全国防重点学科实验室;西南科技大学极端条件物质特性实验室; 出版日期：2012-11-08 出版单位：物理学报 年：2012 期：v.61 基金：国家自然科学基金(批准号:51074131,21007052);; 核废物与环境安全国防重点学科实验室基金(批准号:11zxnk09)资助的课题~~ 语种：中文; 页：WLXB201221024 页数：6 CN：21 ISSN：11-1958/O4 分类号：168-173

摘要

以Nd(Ⅲ)作为放射性核素An(Ⅲ)的模拟替代物,以Gd_2O_3和ZrO_2粉体为原料,通过高温固相反应法(1500℃,保温72 h)合成了Gd_(2-x)Nd_xZr_2O_7(0≤x≤2.0)微米级的钆锆烧绿石固化An(Ⅲ)的模拟固化体.利用X射线衍射仪、显微硬度计和扫描电子显微镜等对所制备样品的物相、密度、维氏硬度和微观形貌进行了表征.结果表明:Gd_(2-x)Nd_xZr_2O_7(0≤x≤2.0)系列固化体样品多呈板状,均为烧绿石相;其密度值随固溶量x值的增加,呈逐渐下降趋势,但均≥5.76 g·cm~(-3).固化体的维氏硬度值(H_v)随x值的递增呈逐渐减小趋势,x值与维氏硬度值之间满足H_v=695.18636-162.64091 x的线性关系,但维氏硬度值均≥400kg·mm~(-2)以上.
        In order to investigate the capability of Gd_2Zr_2O_7 pyrochlore as a waste form for immobilizing trivalent actinides nuclides,Nd(Ⅲ) is used as an alternative substance for An(Ⅲ).The compounds in the system Gd_(2-x)Nd_xZr_2O_7(0≤x≤2.0) are synthesized at 1500℃for 72 h by high temperature solid state reaction method,using Gd_2O_3 and ZrO_2 powders as the raw materials.The phase, intensity,Vickers hardness and microcosmic shape are characterized by X-ray diffraction,Vickers hardness tester,scanning electron microscopy and so on.The results indicate mat the phase of synthesized waste form with plate-shape keeps the phase of pyrochlore. The intensity of compound slightly decreases with the increase of the containment capacity value x,but it is above 5.76 g·cm~(-3). The value of Vickers hardness also decreases with the increase of x.The values of x and Vickers hardness are linearly related by H_V = 695.18636 - 162.64091 x(H_V≥400 kg·mm~(-2)).

引文

[1]Amin Y M 1989 Nucl.Instrum.Methods Phys.Res.280 314
    [2]Nasdala L,Irmer G,Wolf D 1995 Eur.J.Mineral.7 471
    [3]Weber W J 1991 Radiation Effects and Defects in Solids 115 341
    [4]Clarke D R 1983 Ann.Rev.Mater.Sci.13 191
    [5]Robert L E J 1990 Annu.Rev.Part.Sci.40 79
    [6]Wang S X,Begg B D,Wang L M,Ewing R C,Weber W J,Govidan Kutty K V 1999 J.Mater.Res.14 4470
    [7]Weber W J,Ewing R C 2000 Science 289 2051
    [8]Sickafus K E,Minervini L,Grimes R W 2000 Science 289 748
    [9]Ewing R C,Weber W J,Lian J 2004 J.Appl.Phys.95 5949
    [10]Chen J,Lian J,Wang L M,Ewing R C 2001 Appt.Phys.Lett.79 1989
    [11]Lian J,Wang L M,Chen J,Sun K,Ewing R C,Farmer J M,Boatner L A 2003 Acta Mater.51 1493
    [12]Lian J,Wang L M,Haire R G,Helean K B,Ewing R C 2004 Nucl. Instrum.Methods Phys.Res.B 218 236
    [13]Lian J,Ewing R C,Wang L M,Helean K B 2004 J.Mater.Res. 19 1575
    [14]Zhang F X,Lian J,Zhang J M,Moreno K J,Fuentes A F,Wang Z W,Ewing R C 2010 Journal of Alloy and Compounds 494 34
    [15]Pan ZL 1993 Crystallography and Mineralogy(Vol.1)(Beijing: Geology Press) pl52(in Chinese)[潘兆鲁1993结晶学及矿物学(上)(北京:地质出版社)第152页]