Premium
High‐Temperature Transport Property of In 2− x Ce x O 3 (0 ≤ x ≤ 0.10) Fine Grained Ceramics
Author(s) -
Liu Yong,
Lin YuanHua,
Xu Wei,
Cheng Bo,
Lan Jinle,
Chen Dongliang,
Zhu Hongmin,
Nan CeWen
Publication year - 2012
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/j.1551-2916.2012.05206.x
Subject(s) - spark plasma sintering , grain size , materials science , thermoelectric effect , ceramic , sintering , doping , analytical chemistry (journal) , mineralogy , chemistry , composite material , optoelectronics , chromatography , physics , thermodynamics
Using the spark plasma sintering process In 2 −x Ce x O 3 (0 ≤ x ≤ 0.10) fine grained ceramics have been synthesized. Our results indicate that all the In 2 O 3 ‐based ceramic samples show good electrical conductivity and high thermoelectric power factor. In comparison with pure In 2 O 3 bulks or doped samples with grain size above 1 μm, the 100–300 nm fine grain In 2 O 3 ‐based ceramics exhibit much lower thermal conductivities (1.9–2.5 W·(m·K) −1 at 1173 K), demonstrating a remarkable cooperative tuning effect imposed by grain size reduction and nano‐clusters formation. The maximum figure of merit ZT value is optimized up to ~0.47 at 1223 K for In 1.92 Ce 0.08 O 3 sample, which makes them promising candidates for thermoelectric applications.