About: Water based sol-gel methods used for Bi-222 thermoelectrics preparation

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Three different water based sol-gel methods were compared in the synthesis of Bi2Sr2Co1.8Ox thermoelectric ceramics. We chose methods that can stabilize a Bi3+ ion while solution and gel are formed: chelating method using combination of ethylenediamintetraacetic acid (EDTA) and triethanolamine (TEA) chelating agents and, further, synthesis using two different water soluble polymers-polyacrylamide or polyethylenimin. In each sol-gel process, we tested two gel decomposition atmospheres. The gels were decomposed either in air or in inert atmosphere (followed by treatment in pure oxygen). Additionally, a sample synthesized by solid state reaction was used for comparison with the sol-gel prepared samples. The grain size of precursors and also their phase composition were determined for methods used and different gels decomposition atmospheres. The sintered final samples did not differ in phase composition; on the other hand, they vary in volume density and microstructure. The differences were reflected in electric transport measurement (the temperature dependence of Seebeck coefficient, resistivity and thermal conductivity). The use of EDTA/TEA or PEI methods led to the samples with improved thermoelectric parameters in comparison to the solid state sample. Three different water based sol-gel methods were compared in the synthesis of Bi2Sr2Co1.8Ox thermoelectric ceramics. We chose methods that can stabilize a Bi3+ ion while solution and gel are formed: chelating method using combination of ethylenediamintetraacetic acid (EDTA) and triethanolamine (TEA) chelating agents and, further, synthesis using two different water soluble polymers-polyacrylamide or polyethylenimin. In each sol-gel process, we tested two gel decomposition atmospheres. The gels were decomposed either in air or in inert atmosphere (followed by treatment in pure oxygen). Additionally, a sample synthesized by solid state reaction was used for comparison with the sol-gel prepared samples. The grain size of precursors and also their phase composition were determined for methods used and different gels decomposition atmospheres. The sintered final samples did not differ in phase composition; on the other hand, they vary in volume density and microstructure. The differences were reflected in electric transport measurement (the temperature dependence of Seebeck coefficient, resistivity and thermal conductivity). The use of EDTA/TEA or PEI methods led to the samples with improved thermoelectric parameters in comparison to the solid state sample. (en)
Title	Water based sol-gel methods used for Bi-222 thermoelectrics preparation Water based sol-gel methods used for Bi-222 thermoelectrics preparation (en)
skos:prefLabel	Water based sol-gel methods used for Bi-222 thermoelectrics preparation Water based sol-gel methods used for Bi-222 thermoelectrics preparation (en)
skos:notation	RIV/60461373:22310/12:43893526!RIV13-GA0-22310___
http://linked.open...avai/predkladatel	Fakulta chemické technologie
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/09/1036), Z(AV0Z10100521)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Sedmidubský, David Jakeš, Vít Rubešová, Kateřina Hlásek, Tomáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	180720
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/12:43893526
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	PAAM; PEI; TEA; EDTA; Sol-gel; Thermoelectrics; BiSrCoO (en)
http://linked.open.../riv/klicoveSlovo	PEI Sol-gel EDTA BiSrCoO PAAM TEA Thermoelectrics
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[9D13F78DC957]
http://linked.open...i/riv/nazevZdroje	JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Thermoelectric cobaltites
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	64
http://linked.open...iv/tvurceVysledku	Sedmidubský, David Hejtmánek, Jiří Jakeš, Vít Rubešová, Kateřina Hlásek, Tomáš
http://linked.open...ain/vavai/riv/wos	000310163400011
http://linked.open...n/vavai/riv/zamer	Physics and technology of nanostructures, surfaces and thin films
issn	0928-0707
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s10971-012-2831-6
http://localhost/t...ganizacniJednotka	22310
is http://linked.open...avai/riv/vysledek of	Water based sol-gel methods used for Bi-222 thermoelectrics preparation

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