Open AccessElectrical Properties of La and Sm Co-Doped SrTiO3 for Mixed Ionic-Electronic Conductor
Author(s) -
Ke Shan,
Fengrui Zhai,
Nan Li,
Zhen Yi
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/678/1/012139
Subject(s) - materials science , doping , analytical chemistry (journal) , electrical resistivity and conductivity , ionic bonding , ionic conductivity , conductivity , mineralogy , chemistry , ion , electrode , electrolyte , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics
The mixed conductor materials La 0.3 Sr 0.7 Sm x Ti 1-x O 3-δ was prepared via sol-gel method. The influence of Sm content on the electrical properties of La, Sm co-doping SrTiO 3 was investigated. Sm-doping increased the sinterability of La 0.3 Sr 0.7 Sm x Ti 1-x O 3-δ. With the Sm-doping increasing, the total electrical conductivity and the ionic conductivity of La 0.3 Sr 0.7 Sm x Ti 1-x O 3-δ increased. The optimized La 0.3 Sr 0.7 Sm 0.08 Ti 0.92 O 3-δ sample exhibits the total electrical conductivity in the order of 0.132-0.315 S·cm −1 at 500-900°C. The ionic conductivity for La 0.3 Sr 0.7 Sm 0.08 Ti 0.92 O 3-δ was 9.22×10 −3 S·cm −1 and increased about 266% compared with La 0.3 Sr 0.7 Sm 0.04 Ti 0.96 O 3-δ at 950°C. The possible charge compensation mechanism in La 0.3 Sr 0.7 Sm x Ti 1-x O 3-δ was discussed.