About: Bi-based superconductors with nanosized silver dopant

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Byl studován vliv nanočástic střibra na vznik a transportní vlastnosti fáze Bi-2223. Vzorky nominálního složení Bi3.2Pb0.8Sr4Ca5Cu7Ox byly připraveny reakcí v pevné fázi. Stříbro bylo přidáno v podílech 5, 10 a 15 hm.%. Ag prášek byl přidáván buď do výchozí reakční směsi nebo po druhé kalcinaci. Kritická teplota všech vzorků se pohybovala v intervalu 108-109 K. Pro koncentraci 10 hm.% Ag byl pozorován vzrůst obsahu fáze Bi-2223. Prodloužení doby slinování na 400 hodin zlepšilo kritickou proudovou hustotu nad hodnotu nedopovaného vzorku. Hodnoty porozity a hustoty ukázaly zhutnění vzorků s dlouhou dobou slinování. Podle snímků SEM zlepšuje přídavek stříbra konektivitu zrn. (cs) The effect of nanosized silver on formation and transport properties of Bi-2223 phase was studied. Samples with nominal composition Bi3.2Pb0.8Sr4Ca5Cu7Ox were prepared by solid state synthesis. Ag as additive was used in three different weight percentage 5, 10 and 15. Ag powder was added to the initial mixture or after second calcination. All samples have critical temperature Tc in the range 108-109 K. An increase of the Bi-2223 phase content was observed at Ag concentration 10 wt%. Prolonged sintering time (400 h) improved critical current density Jc(77) above the value of the undoped sample. The values of porosity and density of the long sintered samples demonstrated their densification. The SEM micrographs have shown that addition of the silver improves the connectivity between the grains. The effect of nanosized silver on formation and transport properties of Bi-2223 phase was studied. Samples with nominal composition Bi3.2Pb0.8Sr4Ca5Cu7Ox were prepared by solid state synthesis. Ag as additive was used in three different weight percentage 5, 10 and 15. Ag powder was added to the initial mixture or after second calcination. All samples have critical temperature Tc in the range 108-109 K. An increase of the Bi-2223 phase content was observed at Ag concentration 10 wt%. Prolonged sintering time (400 h) improved critical current density Jc(77) above the value of the undoped sample. The values of porosity and density of the long sintered samples demonstrated their densification. The SEM micrographs have shown that addition of the silver improves the connectivity between the grains. (en)
Title	Bi-based superconductors with nanosized silver dopant Bi-based superconductors with nanosized silver dopant (en) Bismutové supravodiče dopované nanočásticemi stříbra (cs)
skos:prefLabel	Bi-based superconductors with nanosized silver dopant Bi-based superconductors with nanosized silver dopant (en) Bismutové supravodiče dopované nanočásticemi stříbra (cs)
skos:notation	RIV/60461373:22310/06:00016963!RIV07-MSM-22310___
http://linked.open.../vavai/riv/strany	3027-3030
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/05/0114), Z(MSM6046137302)
http://linked.open...iv/cisloPeriodika	9
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	Sýkorová, Dagmar Jakeš, Vít Smrčková, Olga
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	466867
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/06:00016963
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Superconductors; doping; electrical properties (en)
http://linked.open.../riv/klicoveSlovo	Superconductors doping electrical properties
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[EE2865DE139B]
http://linked.open...i/riv/nazevZdroje	Physica Status Solidi (c)
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Bi-based superconductors with nanosize dopants
http://linked.open...UplatneniVysledku	2006
http://linked.open...v/svazekPeriodika	3
http://linked.open...iv/tvurceVysledku	Jakeš, Vít Smrčková, Olga Sýkorová, Dagmar
http://linked.open...n/vavai/riv/zamer	Preparation and research of functional materials and material technologies using micro- and nanoscopic methods
issn	1610-1634
number of pages	4 (xsd:int)
http://localhost/t...ganizacniJednotka	22310

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