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作者:

Zhang Fei-Peng (Zhang Fei-Peng.) | Lu Qing-Mei (Lu Qing-Mei.) | Zhang Jiu-Xing (Zhang Jiu-Xing.) | Zhang Xin (Zhang Xin.)

收录:

Scopus SCIE PKU CSCD

摘要:

Double-substituted BaxAgyCa3-x-yCo4O9 bulks were fabricated by nitric acid sol-gel and spark plasma sintering, and the phase composition, orientation, texture and electrical transport properties of the bulks were investigated by means of X-ray diffraction, scanning electron microscope and electrical resisitivity measurement. The result shows that silver which does not belong to the stoichiometric compounds BaxAgyCa2.8Co4O9 is distributed in the matrix. The degree of orientation increases with increasing ratio of Ba to Ag for the double-substituted bulk. The orientation of BaxAgyCa2.8Co4O9 (y > 0) bulks is prominently lower than that of Ca3Co4O9 and the orientation of Ba0.2Ca2.8Co4O9 bulk is higher than that of Ca3Co4O9 bulk. The electrical transport mechanism of the bulk with x = y = 0. 1 is changed slightly. The Ba0.1Ag0.1Ca2.8Co4O9 bulk exhibits simultaneously lowered orientation and moderately low resistivity and the resistivity reaches 7.3 m Omega(.)cm at 973 K. The Ag0.2Ca2.8Co4O9 bulk exhibits lowest orientation and lowest resistivity, reaching 6.3 m Omega(.)cm at 973 K.

关键词:

electrical transport properties Cu3Co4O9 texture double substitution

作者机构:

  • [ 1 ] [Zhang Fei-Peng]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Lu Qing-Mei]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 ] [Zhang Xin]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China

通讯作者信息:

  • [Lu Qing-Mei]Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China

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来源 :

ACTA PHYSICA SINICA

ISSN: 1000-3290

年份: 2009

期: 4

卷: 58

页码: 2697-2701

1 . 0 0 0

JCR@2022

ESI学科: PHYSICS;

JCR分区:3

中科院分区:1

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