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鈦基金屬摻混納米金剛石陰極的場發(fā)射特性
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延安大學(xué)物理與電子信息學(xué)院,延安大學(xué)物理與電子信息學(xué)院,西北大學(xué)信息科學(xué)與技術(shù)學(xué)院,西北大學(xué)信息科學(xué)與技術(shù)學(xué)院,延安大學(xué)物理與電子信息學(xué)院

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The PH.D Start-up Foundation of Yan’an University (No. YD 2010-04), the Special Foundation of Yan’an University (No. YDZD 2011-01), 2012 Local University National Training Project of Innovation and Entrepreneurship for Undergraduates (No. 201210719026), 2014 Education and Innovation Project of Yan’an University for Graduate Student and 2014 Local University National Training Project of Innovation and Entrepreneurship for Undergraduates (No. 201410719023)


Field emission characteristics of metals-doped nano-diamond cathode on titanium substrate
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College of Physics & Electronic Information, Yan’an University,College of Physics & Electronic Information, Yan’an University,College of Information Science &Technology, Northwest University,College of Information Science &Technology, Northwest University,College of Physics & Electronic Information, Yan’an University

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    摘要:

    研究了鈦基金屬摻混納米金剛石的場發(fā)射特性，其中，以鈦和鉿分別和納米金剛石摻混，采用電泳法制得了陰極樣品，并使用SEM和XRD對陰極樣品的結(jié)構(gòu)和形貌進(jìn)行了表征，最后進(jìn)行場發(fā)射特性的測試。結(jié)果發(fā)現(xiàn)，摻入5 mg的鈦樣品的形貌更加均勻和致密，而摻入鉿樣品的形貌變差。同時，與未摻雜樣品相比較而言，摻鈦樣品的場發(fā)射特性有了提高，而摻鉿樣品的場發(fā)射特性有所下降。摻鈦樣品之間的比較發(fā)現(xiàn)，鈦摻入量不宜過多，適量的鈦摻入能使得納米金剛石陰極的場發(fā)射性能得到提高。分析表明，這是由金屬鈦和鉿的性質(zhì)決定的，影響了金剛石與基底Ti的鍵合反應(yīng)，從而影響了摻雜納米金剛石的場發(fā)射性能。

    Abstract:

    Field emission characteristics of metals-doped nano-diamond on titanium substrate are studied, wherein metals—Ti and Hf are mixed with nano-diamond separately, and cathode samples are prepared by electrophoresis. Then the structures and morphologies of cathode samples are characterized by SEM and XRD, finally, field emission test is conducted. Results show that the morphology of 5 mg Ti-doped sample is more uniform and dense, but the morphologies of Hf-doped samples become worse. Meanwhile, compared with undoped sample, field emission characteristics of Ti-doped samples improve, Hf-doped samples decrease. Compared between Ti-doped samples, it is found that the amount of Ti mixed with nano-diamond should not be too much, mixing a moderate amount of Ti can make field emission characteristics of nano-diamond on Ti substrate improve. Analysis shows that this is determined by the nature of metal Ti and Hf, which influences the bonding reaction between nano-diamond and substrate Ti, therefore, field emission characteristics of doped nano-diamond on Ti substrate are influenced.

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引用本文

楊延寧,李偉霞,張志勇,翟春雪,劉巧平.鈦基金屬摻混納米金剛石陰極的場發(fā)射特性[J].稀有金屬材料與工程,2017,46(3):617~621.[Yang Yanning, Li Weixia, Zhang Zhiyong, Zhai Chunxue, Liu Qiaoping. Field emission characteristics of metals-doped nano-diamond cathode on titanium substrate[J]. Rare Metal Materials and Engineering,2017,46(3):617~621.]
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  • 收稿日期:2014-12-06
  • 最后修改日期:2015-07-22
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2017-05-18
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