Electrical Transport and Electron Emission Properties of [Ca24Al28O64]4+: 4e- Single Crystal - 文章详情页

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摘要：

A　single　crystal　of　[Ca24Al28O64]4+:　4e-(C12A7:　e-)　was　prepared　via　a　spark　plasma　sintering　(SPS)-floating　zone　(Fz)-Ti　metal　reduction　method.　The　electron　concentration　of　C12A7:　e-　was　measured　and　its　thermionic　emission　properties　of　free　growth　surface　at　800-1100　were　also　investigated.　The　results　show　that　after　the　reduction　treatment　with　Ti　metal　at　1100　for　30h,　a　C12A7:e-　single　crystal　with　a　theoretical　maximum　electron　concentration　(2.1×1021　cm-3)　is　obtained,　and　the　electrical　conductivity　at　room　temperature　is　1.96×103　S/cm.　The　emission　current　density　reaches　a　maximum　value　of　1.25A/cm2　at　1100　with　a　voltage　of　3.5kV.　The　average　effective　work　function　is　1.81eV,　showing　a　good　thermionic　emission　performance.　©　2019,　Editorial　Department　of　Journal　of　the　Chinese　Ceramic　Society.　All　right　reserved.

关键词：

Spark plasma sintering Electron emission Thermionic emission Single crystals

作者机构：

[ 1 ] [Zhao, Jiping]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Zhang, Xin]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Liu, Hongliang]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Xiao, Yixin]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Jiang, Hao]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Zhang, Jiuxing]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 7 ] [Zhang, Jiuxing]School of Materials Science and Engineering, Hefei University of Technology, Hefei; 230009, China

通讯作者信息：

[zhang, xin]key laboratory of advanced functional materials, college of materials science and engineering, beijing university of technology, beijing; 100124, china

电子邮件地址：

zhxin@bjut.edu.cn

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