Využití metod sol-gel pro přípravu směsných oxidů

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F07%3A00018190" target="_blank" >RIV/60461373:22310/07:00018190 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Use of sol-gel methods for mixed oxides preparation

Popis výsledku v původním jazyce

High-Tc cuprates are superconductors of II-type with a problem of current losses caused by early vortex melting. Vortices can be pinned down by structure defects or by particles of size comparable with coherence length of the superconductor. Substitutionof "foreign" cations into superconducting cuprates is still noteworthy for possibilities to affect properties of prepared materials. One of the main problems with preparation of such material is to ensure distribution and appropriate size of a secondaryphase playing role of pinning centre. Bi-2223 phase consists of five cations and is build out of alternating rocksalt-like and perovskite-like layers. This high-Tc phase is formed in solid state by multistep reaction via many mixed oxides. The followingreaction mechanism is generally accepted [1,2] in solid state reaction between oxides and carbonates of Bi, Pb, Sr, Ca and Cu: Raveau phase (2201) or 2212 phase is firstly produced, then it reacts with mixed oxide of Ca and Pb forming Pb

Název v anglickém jazyce

Use of sol-gel methods for mixed oxides preparation

Popis výsledku anglicky

High-Tc cuprates are superconductors of II-type with a problem of current losses caused by early vortex melting. Vortices can be pinned down by structure defects or by particles of size comparable with coherence length of the superconductor. Substitutionof "foreign" cations into superconducting cuprates is still noteworthy for possibilities to affect properties of prepared materials. One of the main problems with preparation of such material is to ensure distribution and appropriate size of a secondaryphase playing role of pinning centre. Bi-2223 phase consists of five cations and is build out of alternating rocksalt-like and perovskite-like layers. This high-Tc phase is formed in solid state by multistep reaction via many mixed oxides. The followingreaction mechanism is generally accepted [1,2] in solid state reaction between oxides and carbonates of Bi, Pb, Sr, Ca and Cu: Raveau phase (2201) or 2212 phase is firstly produced, then it reacts with mixed oxide of Ca and Pb forming Pb

Druh

D - Stať ve sborníku

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA203%2F05%2F0114" target="_blank" >GA203/05/0114: Bismutové supravodiče s nanočásticemi dopantů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2007

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

DMSRE, 17th joint seminar

ISBN

978-80-89088-55-3

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

59-60

Název nakladatele

FCFT STU Bratislava

Místo vydání

Bratislava

Místo konání akce

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Datum konání akce

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Typ akce podle státní příslušnosti

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Kód UT WoS článku

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