Thermoelectric Efficiency of Reduced   SrTiO   3  Ceramics Modified with   La   and   Nb | Zendy

Teranishi Takashi | Zendy; Ishikawa Yusuke | Zendy; Hayashi Hidetaka | Zendy; Kishimoto Akira | Zendy; Katayama Misaki | Zendy; Inada Yasuhiro | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Premium

Thermoelectric Efficiency of Reduced SrTiO 3 Ceramics Modified with La and Nb

Author(s) -

Teranishi Takashi,

Ishikawa Yusuke,

Hayashi Hidetaka,

Kishimoto Akira,

Katayama Misaki,

Inada Yasuhiro

Publication year - 2013

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.12379

Subject(s) - materials science , sintering , analytical chemistry (journal) , ceramic , seebeck coefficient , electrical resistivity and conductivity , strontium titanate , mineralogy , thermoelectric effect , doping , metallurgy , chemistry , nanotechnology , composite material , thermal conductivity , thin film , physics , optoelectronics , chromatography , thermodynamics , quantum mechanics

Ceramics of La x Sr 1− x Nb y Ti 1− y O 3 ( LSNT ) were synthesized under various reducing atmospheres. Covering the specimens with graphite carbon felt under an Ar‐gas flow during sintering drastically enhanced the electrical conductivity, σ. Ti K‐edge absorption spectra indicated the presence of Ti 3+ for heavily reduced specimens. The increase in conductivity was attributed to the 3d band of Ti 3+ . The maximum value for the figure of merit, ZT , was obtained for strontium titanate ceramics modified with both 5 mol% La and 5 mol% Nb, namely 5/5‐LSNT, exhibiting a ZT value of ~0.221 at 473 K. This high ZT value was almost 1.5 × larger than that of the conventional 10 mol% La‐doped sample, 10/0‐LSNT ( ZT ~0.144), and was mainly attributed to the larger Seebeck coefficient of the material.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research