About: Use of sol-gel methods for mixed oxides preparation

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 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 (en) Využití metod sol-gel pro přípravu směsných oxidů (cs)
Title	Use of sol-gel methods for mixed oxides preparation Use of sol-gel methods for mixed oxides preparation (en) Využití metod sol-gel pro přípravu směsných oxidů (cs)
skos:prefLabel	Use of sol-gel methods for mixed oxides preparation Use of sol-gel methods for mixed oxides preparation (en) Využití metod sol-gel pro přípravu směsných oxidů (cs)
skos:notation	RIV/60461373:22310/07:00018190!RIV08-GA0-22310___
http://linked.open.../vavai/riv/strany	59-60
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA203/05/0114)
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Sýkorová, Dagmar Jakeš, Vít Rubešová, Kateřina Smrčková, Olga
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
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	456968
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/07:00018190
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	sol-gel; mixed oxides (en)
http://linked.open.../riv/klicoveSlovo	mixed oxides sol-gel
http://linked.open...ontrolniKodProRIV	[0B32C27AD5FA]
http://linked.open...i/riv/mistoVydani	Bratislava
http://linked.open...i/riv/nazevZdroje	DMSRE, 17th joint seminar
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Bi-based superconductors with nanosize dopants
http://linked.open...UplatneniVysledku	2007
http://linked.open...iv/tvurceVysledku	Jakeš, Vít Rubešová, Kateřina Smrčková, Olga Sýkorová, Dagmar
number of pages	2 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Slovenská technická univerzita v Bratislave. Fakulta chemickej a potravinárskej technológie
https://schema.org/isbn	978-80-89088-55-3
http://localhost/t...ganizacniJednotka	22310

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