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Author:

Liu, Fei (Liu, Fei.) | Zhang, Xin (Zhang, Xin.) | Yin, Zhanqing (Yin, Zhanqing.) | Luo, Zhuang (Luo, Zhuang.) | Xiao, Yixin (Xiao, Yixin.) | Liu, Yanqin (Liu, Yanqin.) | Lu, Qingmei (Lu, Qingmei.) (Scholars:路清梅)

Indexed by:

EI Scopus SCIE

Abstract:

(Ca1-xCux) 12A7: e(-) bulks (0 <= x <= 0.05) with electrical performance were fabricated by the in-situ aluminothermic synthesis. The results showed that all the electron concentrations of (Ca1-xCux) 12A7: e(-) reached the theoretical value of about 2.28 x 10(21) cm(-3). In (Ca0.96Cu0.04) 12A7: e(-), the electron mobility at room temperature increased from 3.81 to 5.19 cm(2) V-1 S-1 and the conductivity increased from 415 to 1405 S cm(-1). It indicated that Cu-doping effectively improved electrical properties. The photoexcitation property also changed positively. The energy required for electrons to transition from cage conduction band to frame conduction band showed a decreasing trend, from 2.23 to 1.48 eV. The first-principle calculation showed an upward shift in the Fermi energy level position of C12A7: e(-). In addition, Cu atoms provided more density of states near the Fermi energy level. The number of empty orbitals near the Fermi surface of (Ca1-xCux) 12A7: e(-) that can receive excited electrons increased. It provided a theoretical basis for preparing (Ca1-xCux) 12A7: e(-) with high electrical transport characteristics.

Keyword:

electrical properties first-principles functional ceramic e(-)

Author Community:

  • [ 1 ] [Liu, Fei]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Dept Mat Sci & Engn,Fac Mat & Mfg, Beijing, Peoples R China
  • [ 2 ] [Zhang, Xin]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Dept Mat Sci & Engn,Fac Mat & Mfg, Beijing, Peoples R China
  • [ 3 ] [Yin, Zhanqing]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Dept Mat Sci & Engn,Fac Mat & Mfg, Beijing, Peoples R China
  • [ 4 ] [Luo, Zhuang]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Dept Mat Sci & Engn,Fac Mat & Mfg, Beijing, Peoples R China
  • [ 5 ] [Xiao, Yixin]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Dept Mat Sci & Engn,Fac Mat & Mfg, Beijing, Peoples R China
  • [ 6 ] [Liu, Yanqin]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Dept Mat Sci & Engn,Fac Mat & Mfg, Beijing, Peoples R China
  • [ 7 ] [Lu, Qingmei]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Dept Mat Sci & Engn,Fac Mat & Mfg, Beijing, Peoples R China

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Source :

JOURNAL OF THE AMERICAN CERAMIC SOCIETY

ISSN: 0002-7820

Year: 2022

Issue: 6

Volume: 105

Page: 4135-4142

3 . 9

JCR@2022

3 . 9 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:66

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 4

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 6

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