Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13

The oxide materials Ca3Co4O9 and Na2Ca2Nb4O13 were combined in a new ceramic composite with promising synergistic thermoelectric properties. Both compounds show a plate-like crystal shape and similar aspect ratios but the matrix material Ca3Co4O9 with lateral sizes of less than 500 nm is about two o...

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Autores principales:	R. Hinterding, M. Wolf, M. Jakob, O. Oeckler, A. Feldhoff
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Calcium cobalt oxide Composite Ceramic Sodium calcium niobate Reaction sintering Thermoelectrics Clay industries. Ceramics. Glass TP785-869
Acceso en línea:	https://doaj.org/article/04fd1439c6d14121897857fafa19e907
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spelling	oai:doaj.org-article:04fd1439c6d14121897857fafa19e9072021-11-28T04:38:49ZImproved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O132666-539510.1016/j.oceram.2021.100198https://doaj.org/article/04fd1439c6d14121897857fafa19e9072021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666539521001449https://doaj.org/toc/2666-5395The oxide materials Ca3Co4O9 and Na2Ca2Nb4O13 were combined in a new ceramic composite with promising synergistic thermoelectric properties. Both compounds show a plate-like crystal shape and similar aspect ratios but the matrix material Ca3Co4O9 with lateral sizes of less than 500 nm is about two orders of magnitude smaller. Uniaxial pressing of the mixed compound powders was used to produce porous ceramics after conventional sintering. Reactions between both compounds and their compositions were thoroughly investigated. In comparison to pure Ca3Co4O9, mixing with low amounts of Na2Ca2Nb4O13 proved to be beneficial for the overall thermoelectric properties. A maximum figure-of-merit of zT = 0.32 at 1073 K and therefore an improvement of about 19% was achieved by the ceramic composites.R. HinterdingM. WolfM. JakobO. OecklerA. FeldhoffElsevierarticleCalcium cobalt oxideCompositeCeramicSodium calcium niobateReaction sinteringThermoelectricsClay industries. Ceramics. GlassTP785-869ENOpen Ceramics, Vol 8, Iss , Pp 100198- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Calcium cobalt oxide Composite Ceramic Sodium calcium niobate Reaction sintering Thermoelectrics Clay industries. Ceramics. Glass TP785-869
spellingShingle	Calcium cobalt oxide Composite Ceramic Sodium calcium niobate Reaction sintering Thermoelectrics Clay industries. Ceramics. Glass TP785-869 R. Hinterding M. Wolf M. Jakob O. Oeckler A. Feldhoff Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13
description	The oxide materials Ca3Co4O9 and Na2Ca2Nb4O13 were combined in a new ceramic composite with promising synergistic thermoelectric properties. Both compounds show a plate-like crystal shape and similar aspect ratios but the matrix material Ca3Co4O9 with lateral sizes of less than 500 nm is about two orders of magnitude smaller. Uniaxial pressing of the mixed compound powders was used to produce porous ceramics after conventional sintering. Reactions between both compounds and their compositions were thoroughly investigated. In comparison to pure Ca3Co4O9, mixing with low amounts of Na2Ca2Nb4O13 proved to be beneficial for the overall thermoelectric properties. A maximum figure-of-merit of zT = 0.32 at 1073 K and therefore an improvement of about 19% was achieved by the ceramic composites.
format	article
author	R. Hinterding M. Wolf M. Jakob O. Oeckler A. Feldhoff
author_facet	R. Hinterding M. Wolf M. Jakob O. Oeckler A. Feldhoff
author_sort	R. Hinterding
title	Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13
title_short	Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13
title_full	Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13
title_fullStr	Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13
title_full_unstemmed	Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13
title_sort	improved thermoelectric properties in ceramic composites based on ca3co4o9 and na2ca2nb4o13
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/04fd1439c6d14121897857fafa19e907
work_keys_str_mv	AT rhinterding improvedthermoelectricpropertiesinceramiccompositesbasedonca3co4o9andna2ca2nb4o13 AT mwolf improvedthermoelectricpropertiesinceramiccompositesbasedonca3co4o9andna2ca2nb4o13 AT mjakob improvedthermoelectricpropertiesinceramiccompositesbasedonca3co4o9andna2ca2nb4o13 AT ooeckler improvedthermoelectricpropertiesinceramiccompositesbasedonca3co4o9andna2ca2nb4o13 AT afeldhoff improvedthermoelectricpropertiesinceramiccompositesbasedonca3co4o9andna2ca2nb4o13
_version_	1718408237607288832

Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13

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