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浙江大学学报(理学版)
物理学     
K在C60单晶中的扩散通量研究
浙江大学玉泉校区物理系,浙江 杭州 310027
Study on the Diffusion Flux of K in C60 Single Crystal
Department of Physics,Zhejiang University,Hangzhou 310027,China
 全文: PDF(49 KB)  
摘要: 通过电阻率测量研究了K原子在C60单晶中的扩散深度与时间的关系,得出温度为230℃时K原子在C60单晶中的扩散系数约为10-15m2s-1.由扩散系数估算出制备0.1mm厚K3C60单晶约需1452小时扩散时间,而1mm厚单晶约需16年,因而毫米级K3C60单晶几乎是不可能制成的,对K原子扩散通量的计算结果表明,要使样品中(尤其是表面附近)不形成K6C60相,扩散初期样品附近K蒸气的压强不宜超过1×10-6Torr,并应随时间的(-1/2)次方而减小.在这个工作基础上,对文献中一些矛盾的结果作了较为满意的解释.
关键词: K3C60单晶扩散系数扩散通量     
Abstract: The relationship between diffusion depth of K in the C60 single crystal and diffusion time was researched through the electrical resistivity measurements.Diffusion coefficient of about 10-15m2s-1 was deduced.Diffusion time for the preparation of 0.1mm and 1.0mm thickness K3C60 single crystal was calculated to be about 1452 hours and 16 years respectively.In order to prevent the specimen from formating K6C60,the calculated flux of K in the K3C60 single crystal demonstrated that the vapour pressure of K around the specimen should be no more than 1×10-16 Torr in the initial period of diffusion.Based on these works,some inconsistent results in the literatures were successfully explained.
Key words: K3C60 single crystal    diffusion coefficience    diffusion flux
收稿日期: 1997-01-10 出版日期: 2017-11-10
CLC:  O511.3  
作者简介: 李宏年(1966-),男,浙江大学玉泉校区物理系讲师,主要从事富勒烯物理与表面物理研究.
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引用本文:

李宏年,徐波,徐亚伯,何丕模,鲍世宁. K在C60单晶中的扩散通量研究[J]. 浙江大学学报(理学版), .

LI Hong-nian,XU Bo,XU Ya-bo,et al . Study on the Diffusion Flux of K in C60 Single Crystal. Journal of Zhejiang University (Science Edition), .

链接本文:

https://www.zjujournals.com/sci/CN/        https://www.zjujournals.com/sci/CN/Y1999/V26/I2/33

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