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Statements

Subject Item

n2:RIV%2F60461373%3A22310%2F07%3A00018190%21RIV08-GA0-22310___

rdf:type

n10:Vysledek skos:Concept

dcterms:description

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. Substitution of %22foreign%22 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 secondary phase 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 following reaction 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-ri Využití metod sol-gel pro přípravu směsných oxidů 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. Substitution of %22foreign%22 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 secondary phase 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 following reaction 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-ri

dcterms:title

Use of sol-gel methods for mixed oxides preparation Use of sol-gel methods for mixed oxides preparation Využití metod sol-gel pro přípravu směsných oxidů

skos:prefLabel

Use of sol-gel methods for mixed oxides preparation Využití metod sol-gel pro přípravu směsných oxidů Use of sol-gel methods for mixed oxides preparation

skos:notation

RIV/60461373:22310/07:00018190!RIV08-GA0-22310___

n3:strany

59-60

n3:aktivita

n19:P

n3:aktivity

P(GA203/05/0114)

n3:dodaniDat

n6:2008

n3:domaciTvurceVysledku

n4:4268520 n4:4236602 n4:8374341 n4:1674455

n3:druhVysledku

n18:D

n3:duvernostUdaju

n5:S

n3:entitaPredkladatele

n16:predkladatel

n3:idSjednocenehoVysledku

456968

n3:idVysledku

RIV/60461373:22310/07:00018190

n3:jazykVysledku

n13:eng

n3:klicovaSlova

sol-gel; mixed oxides

n3:klicoveSlovo

n14:mixed%20oxides n14:sol-gel

n3:kontrolniKodProRIV

[0B32C27AD5FA]

n3:mistoVydani

Bratislava

n3:nazevZdroje

DMSRE, 17th joint seminar

n3:obor

n7:CA

n3:pocetDomacichTvurcuVysledku

4

n3:pocetTvurcuVysledku

4

n3:projekt

n12:GA203%2F05%2F0114

n3:rokUplatneniVysledku

n6:2007

n3:tvurceVysledku

Sýkorová, Dagmar Rubešová, Kateřina Smrčková, Olga Jakeš, Vít

s:numberOfPages

2

n17:hasPublisher

Slovenská technická univerzita v Bratislave. Fakulta chemickej a potravinárskej technológie

n11:isbn

978-80-89088-55-3

n20:organizacniJednotka

22310