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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F03%3A00007904%21RIV%2F2004%2FMSM%2F223104%2FN
rdf:type
n7:Vysledek skos:Concept
dcterms:description
Historical pursue of the first spherical tungsten particles appearence lead us till the article on tungsten discovery by Spanish brothers D´Elhuyar in 1783 [1]. The authors used the zinnvaldite ore of Czech provenience for tungsten oxide preparation. After the subsequent reduction of oxide by carbon in a closed crucible they observed pin´s-head size tungsten balls. No later developed technology, that applies carbon for reduction of tungsten oxidic compounds produces such balls. Even thermal sprayedtungsten particles do not show the ideal spherical shape. The first preparation of well shaped globular tungsten particles by plasma spraying was described by Austrian authors in 1963 [2]. Similar looking rounded W-particles can be obtained by leachin g of #heavy metal composites# (W-Ni-Cu pseudoalloys). Historical pursue of the first spherical tungsten particles appearence lead us till the article on tungsten discovery by Spanish brothers D´Elhuyar in 1783 [1]. The authors used the zinnvaldite ore of Czech provenience for tungsten oxide preparation. After the subsequent reduction of oxide by carbon in a closed crucible they observed pin´s-head size tungsten balls. No later developed technology, that applies carbon for reduction of tungsten oxidic compounds produces such balls. Even thermal sprayedtungsten particles do not show the ideal spherical shape. The first preparation of well shaped globular tungsten particles by plasma spraying was described by Austrian authors in 1963 [2]. Similar looking rounded W-particles can be obtained by leachin g of #heavy metal composites# (W-Ni-Cu pseudoalloys).
dcterms:title
Nanosized and spheroidized tungsten and tungsten carbide powders Nanosized and spheroidized tungsten and tungsten carbide powders
skos:prefLabel
Nanosized and spheroidized tungsten and tungsten carbide powders Nanosized and spheroidized tungsten and tungsten carbide powders
skos:notation
RIV/60461373:22310/03:00007904!RIV/2004/MSM/223104/N
n3:strany
79-80
n3:aktivita
n5:Z
n3:aktivity
Z(MSM 223100002)
n3:dodaniDat
n11:2004
n3:domaciTvurceVysledku
n9:9960597
n3:druhVysledku
n18:D
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n10:predkladatel
n3:idSjednocenehoVysledku
617153
n3:idVysledku
RIV/60461373:22310/03:00007904
n3:jazykVysledku
n16:eng
n3:klicovaSlova
nanosized; spheroidized; tungsten; carbide
n3:klicoveSlovo
n4:carbide n4:spheroidized n4:tungsten n4:nanosized
n3:kontrolniKodProRIV
[A1D17D189886]
n3:mistoKonaniAkce
Granada
n3:mistoVydani
Nuernberg
n3:nazevZdroje
Sborník - 4th European Congress of Chemical Engineering
n3:obor
n19:CA
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:rokUplatneniVysledku
n11:2003
n3:tvurceVysledku
Dufek, Vladimír Neufuss, K. Brožek, Vlastimil
n3:typAkce
n13:EUR
n3:zahajeniAkce
2003-09-21+02:00
n3:zamer
n6:MSM%20223100002
s:numberOfPages
2
n17:hasPublisher
ECCE
n20:isbn
84-88233-23-0
n14:organizacniJednotka
22310