悬浮区域熔炼法制备REB6（LaB6、CeB6）单晶体及其表征

功能材料, 2012, 43(2): 178-184.

悬浮区域熔炼法制备REB6（LaB6、CeB6）单晶体及其表征

张宁 ^1, , 张久兴 ^2, , 包黎红 ^3, , 李晓娜 ^4,

1.北京工业大学材料科学与工程学院,新型功能材料教育部重点实验室,北京100124

2.北京工业大学材料科学与工程学院,新型功能材料教育部重点实验室,北京100124

3.北京工业大学材料科学与工程学院,新型功能材料教育部重点实验室,北京100124

4.北京工业大学材料科学与工程学院,新型功能材料教育部重点实验室,北京100124

基金项目: 国家自然科学基金资助项目(50871002)

关键词：悬浮区域熔炼 , 单晶LaB6 , 单晶CeB6 , 表征

Floating zone growth and characterization of single crystal REB6（LaB6,CeB6）cathode

Keywords： floating zone growth , single crystal LaB6 , single crystal CeB6 , characteriation

采用区域熔炼法成功制备出了高质量、高纯度、大尺寸的LaB6、CeB6单晶体。系统分析了制备过程中每个参数对晶体生长的影响,确定了晶体成长最佳工艺：（1）LaB6：转速为30r/min,生长速度为8～10mm/h,两次区熔;（2）CeB6：转速为30r/min,生长速度15～20mm/h,一次区熔。然后对晶体进行表征,主要方法有单晶衍射、断面扫描、拉曼衍射、摇摆曲线。由此可知悬浮区域熔炼法是制备高质量、高纯度、大尺寸REB6的最佳方法。

The high quality,high purity and large size LaB6,CeB6 single crystals had been successfully grown by optical floating zone method.Each parameter which impact in the process of crystal growth was studied in this article.We determine the optimum crystal growth：（1） LaB6： speed of 30r/min,the growth rate of 8-10mm/h,twice zone melting;（2） CeB6： speed of 30r/min,the growth rate of 15-20mm/h,once zone melting.And then analysis the characterizations of single crystals.We use the main method,and they are single crystal diffraction,Raman diffraction,rocking curve,cross-section scanning.These show that floating zone growth is the best method in the produced single crystal REB6（LaB6,CeB6） cathode.

参考文献

[1]	Otani S.;Nishi Y.;Kieda N.;Nakagawa H. .Floating zone growth and high temperature hardness of rare-earth hexaboride crystals: LaB6, CeB6, PrB6, NdB6, and SmB6[J].International Journal of Quantum Chemistry,2000(1):238-241.
[2]	Ma, XG;Xu, ZM;Yuan, HY;He, YY;Xiao, D;Choi, MMF .High-sensitive and selective Eu3+ electrochemical sensor based on LaB6 electrode and sodium dodecylbenzene sulfonate[J].Sensors and Actuators, B. Chemical,2010(1):152-158.
[3]	Zhang, MF;Jia, Y;Xu, GG;Wang, PF;Wang, XQ;Xiong, SL;Wang, XJ;Qian, YT .Mg-Assisted Autoclave Synthesis of RB6 (R = Sm, Eu, Gd, and Tb) Submicron Cubes and SmB6 Submicron Rods[J].European journal of inorganic chemistry,2010(8):1289-1294.
[4]	Zhang, MF;Wang, XQ;Zhang, XW;Wang, PF;Xiong, SL;Shi, L;Qian, YT .Direct low-temperature synthesis of RB6 (R=Ce, Pr, Nd) nanocubes and nanoparticles[J].Journal of Solid State Chemistry,2009(11):3098-3104.
[5]	Qin Yuan Zhang;Jun Qi Xu;Yan Ming Zhao;Xiao Hongji;Shu Ping Lau .Fabrication Of Large-scale Single-crystalline Prb_6 Nanorods And Their Temperature-dependent Electron Field Emission[J].Advanced Functional Materials,2009(5):742-747.
[6]	周身林,刘丹敏,张久兴.SPS制备亚微米多晶LaB6块体的EBSD研究[J].电子显微学报,2008(06):483-486.
[7]	卢庆亮,闵光辉,于化顺.LaB6单晶体制备方法的特点和进展[J].材料导报,2005(09):5-7,11.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网