Premium
Economical Route to Produce High Seebeck Coefficient Calcium Cobaltate for Bulk Thermoelectric Applications
Author(s) -
Selig Jiri,
Lin Sidney,
Lin HuaTay,
Ray Johnson D.,
Wang Hsin
Publication year - 2011
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.1551-2916.2011.04819.x
Subject(s) - seebeck coefficient , thermoelectric effect , materials science , thermal conductivity , particle size , phase (matter) , electrical resistivity and conductivity , particle (ecology) , mineralogy , specific surface area , chemical engineering , thermoelectric materials , analytical chemistry (journal) , metallurgy , composite material , chemistry , thermodynamics , biochemistry , physics , electrical engineering , oceanography , organic chemistry , chromatography , engineering , geology , catalysis
Phase pure calcium cobaltate ( Ca 1.24 Co 1.62 O 3.86 ) was prepared by S elf‐propagating H igh‐temperature Synthesis ( SHS ) followed by a short post heat treatment. Prepared powders were characterized by XRD for phase purity, and SEM for particle size, and distribution. Temperature histories at the center and on the surface of reaction pellet during the SHS process were monitored and recorded. Particle size of synthesized powders was reduced using a planetary mill to increase its specific surface area. Electrical conductivity, thermal conductivity, and Seebeck coefficient of the prepared power were measured and figure of merit was reported.