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Author:

Wang Yang (Wang Yang.) | Zhang Xin (Zhang Xin.) | Zhang Jiu-Xing (Zhang Jiu-Xing.) | Liu Hong-Liang (Liu Hong-Liang.) | Jiang Hao (Jiang Hao.) | Li Lu-Lu (Li Lu-Lu.)

Indexed by:

SCIE PKU CSCD

Abstract:

CeB6 with simple cubic CaB6-type structure has attracted much interest owing to its promising scientific and technological characteristics like high brightness, high melting point, low vapor pressure, long service life, and low work function. High-quality Ce1-xGdxB6(x=0 similar to 0.3) single crystals with ultra-low work function are successfully synthesized via the spark plasma sintering combining floating zone technique. The quality, chemical composition and thermionic emission properties of the Ce1-xGdxB6 single crystals were systematically investigated by 360 phi scanning X-ray single crystal diffraction, X-ray fluorescence and emission measurements. Based on the testing results, the prepared single crystals exhibit good quality. The emission current density of Ce0.9Gd0.1B6 on (100) crystal surface is up to 82.3 A/cm(2) higher than that of CeB6 under 4000 V at 1873 K, while the current density under zero voltage condition is 24.70 A/cm(2), about two-fold higher than that of CeB6. The average value of effective work functions at different temperatures is reduced to 2.30 eV lower than 2.93 eV of CeB6. Such excellent performances suggest that the ternary hexaborides can be used as a promising cathode emitter source for exploration and research in the electron emitter field.

Keyword:

thermionic emission property floating zone method (Ce1-xGdx)B-6 single crystal

Author Community:

  • [ 1 ] [Wang Yang]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang Xin]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Zhang Jiu-Xing]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Liu Hong-Liang]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 5 ] [Jiang Hao]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 6 ] [Li Lu-Lu]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 7 ] [Zhang Jiu-Xing]Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

Reprint Author's Address:

  • [Zhang Xin]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China

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Source :

JOURNAL OF INORGANIC MATERIALS

ISSN: 1000-324X

Year: 2016

Issue: 8

Volume: 31

Page: 797-801

1 . 7 0 0

JCR@2022

ESI HC Threshold:305

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 11

SCOPUS Cited Count: 14

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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