About: Plasmachemical preparation of lead-tungstate bronze

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Redukcí PbWO4 v induktivně buzeném vodíkovém plazmatu při 900°C byla připravena olovnato-wolframová bronz Pb0,261WO3 a metodou DE* změřeny parametry její barevnosti. Dále byla ověřena struktura této látky a sledovány změny obsahu kyslíku v závislosti na době redukce. (cs) Tungsten bronzes are materials based on tungsten oxide that exhibit different colours, excellent chemical resistivity, metallic appearance and good conductivity. The doped tungsten bronzes may by used as anodic catalyst in fuel cells. The tungsten bronzes are prepared by reduction of tungstates. The reduction process is known for very long time, but the correlation between their stoichiometry, conductivity and colour are not yet completely understood. The published results about colour of products are very often misleading. In this paper, we study chemical reactions between lead-tungstate and hydrogen plasma. The reduction was performed in an inductively coupled r.f. discharge. The r.f. generator operated at the frequency of 27 MHz with the power output of 1 kW. The PbWO4 was heated by the discharge to the temperature of 900°C. The resulting samples were analysed by SEM, XRD and three point Lab* method. The XRD spectra of our plasmachemical product show diffraction patterns of... Tungsten bronzes are materials based on tungsten oxide that exhibit different colours, excellent chemical resistivity, metallic appearance and good conductivity. The doped tungsten bronzes may by used as anodic catalyst in fuel cells. The tungsten bronzes are prepared by reduction of tungstates. The reduction process is known for very long time, but the correlation between their stoichiometry, conductivity and colour are not yet completely understood. The published results about colour of products are very often misleading. In this paper, we study chemical reactions between lead-tungstate and hydrogen plasma. The reduction was performed in an inductively coupled r.f. discharge. The r.f. generator operated at the frequency of 27 MHz with the power output of 1 kW. The PbWO4 was heated by the discharge to the temperature of 900°C. The resulting samples were analysed by SEM, XRD and three point Lab* method. The XRD spectra of our plasmachemical product show diffraction patterns of... (en)
Title	Plasmachemical preparation of lead-tungstate bronze Plazmochemická příprava olovnato-wolframové bronzi (cs) Plasmachemical preparation of lead-tungstate bronze (en)
skos:prefLabel	Plasmachemical preparation of lead-tungstate bronze Plazmochemická příprava olovnato-wolframové bronzi (cs) Plasmachemical preparation of lead-tungstate bronze (en)
skos:notation	RIV/61389021:_____/04:00109587!RIV/2005/AV0/A52005/N
http://linked.open.../vavai/riv/strany	13;14
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(ME 489), Z(AV0Z2043910)
http://linked.open...vai/riv/dodaniDat	2005
http://linked.open...aciTvurceVysledku	Brožek, Vlastimil
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	Ústav fyziky plazmatu AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	579695
http://linked.open...ai/riv/idVysledku	RIV/61389021:_____/04:00109587
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	tungsten bronzes, plasmachemical preparation, RF-discharge (en)
http://linked.open.../riv/klicoveSlovo	plasmachemical preparation RF-discharge tungsten bronzes
http://linked.open...ontrolniKodProRIV	[B7527307FD81]
http://linked.open...v/mistoKonaniAkce	Lednice
http://linked.open...i/riv/mistoVydani	Praha
http://linked.open...i/riv/nazevZdroje	Proceedings 14th Joint Seminar DMSRE
http://linked.open...in/vavai/riv/obor	JH
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/ME%20489
http://linked.open...UplatneniVysledku	2004
http://linked.open...iv/tvurceVysledku	Brožek, Vlastimil Eliáš, M. Janča, J.
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2004-08-31 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Generování a diagnostika různých typů plazmatu a jejich interakce s ostatními skupenstvími hmoty
number of pages	2 (xsd:int)
http://purl.org/ne...btex#hasPublisher	MAXDORF,s.r.o
https://schema.org/isbn	80-7345-032-1

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