Premium
Electrical and Thermal Conduction Behaviors in La‐Substituted GdBaCuFeO 5+δ Ceramics
Author(s) -
Zeng Chengcheng,
Zhan Bin,
Butt Sajid,
Liu Yaochun,
Ren Guangkun,
Lin YuanHua,
Li Ming,
Nan CeWen
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13728
Subject(s) - ceramic , materials science , crystallite , electrical resistivity and conductivity , microstructure , analytical chemistry (journal) , substitution (logic) , thermal conduction , thermal conductivity , mineralogy , phase (matter) , band gap , composite material , metallurgy , chemistry , optoelectronics , electrical engineering , organic chemistry , chromatography , computer science , programming language , engineering
Gd 1− x La x BaCuFeO 5+δ polycrystalline ceramics have been prepared by a sol–gel method combined with the traditional ceramic processing. Analysis of the microstructure and phase composition reveals that the pure GdBaCuFeO 5+δ phase can be obtained even after the substitution of 50% La at Gd‐site. The band gap can be tuned from 1.47 to 1.36 eV by La substitution, resulting in a significant increase in the electrical conductivity. In addition, the total thermal conductivity can also be suppressed by the substitution of La at Gd‐sites. A ZT value of 0.02 at 1023 K is achieved in the 50% La‐substituted samples, which is over 20 times higher than that of the pure GdBaCuFeO 5+δ sample.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom