Effects of Synthesis and Processing on the Thermoelectric Properties of Ca3Co4O9+δ

Publication: ResearchConference abstract for conference – Annual report year: 2012

View graph of relations

In the present study, Ca3Co4O9+δ was synthesized by solid-state and sol-gel reactions followed by spark plasma sintering (SPS) under different conditions such as sintering temperatures, applied pressures and ramping rates. The materials were then characterized with respect to their microstructure, phase purity and thermoelectric properties. With the identical optimal SPS process, the power factor of about 400 µW/m•K2 and 465 µW/m•K2 (at 800 °C) is measured from samples produced by solid-state and sol-gel reactions respectively, both of these values are higher than the value reported so far. The thermoelectric performance improvement observed for the solid-state and sol-gel reactions suggests that the particle sizes may be a predominant key parameter of the Ca3Co4O9+δ thermoelectric properties. Smaller particle size (500 nm) as produced in this study by sol-gel synthesis method with optimal SPS process conditions would be a better way to fabricate high performance thermoelectric material Ca3Co4O9+δ.
Original languageEnglish
Publication date2012
StatePublished

Conference

Conference31st International & 10th European Conference on Thermoelectrics
Number31 / 10
CountryDenmark
CityAalborg
Period09/07/1212/07/12
Internet addresshttp://www.ict2012.its.org/

Keywords

  • Thermoelectrics, Spark plasma sintering, Ca3Co4O9+δ, Solid-state reaction, Sol-gel reaction
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 12926619