About: Fe3C nanopowder synthesized by laser pyrolysis and its annealing behaviour

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We describe the Fe3C-based nanopowder obtained through the laser-induced pyrolysis of the gas mixture of Fe(CO)5 and C2H4. This ferromagnetic nanopowder was characterized by XRD, HRTEM and magnetic measurements. Aggregated core-shell nanoparticles were identified in the nanopowder; Fe3C cores were coated with pyrolytic carbon. The mean coherence domain size estimated by the Scherrer formula was 18 nm. Basic magnetic characteristics were measured at 20 °C: HC = 42.0 kA/m; σ_r = 31.2 A m2/kg; σ_s = 95.7 A.m2/kg (at 1200 kA/m). The Curie temperature Tc was 227 °C. Thermally induced phase transformations are discussed. We describe the Fe3C-based nanopowder obtained through the laser-induced pyrolysis of the gas mixture of Fe(CO)5 and C2H4. This ferromagnetic nanopowder was characterized by XRD, HRTEM and magnetic measurements. Aggregated core-shell nanoparticles were identified in the nanopowder; Fe3C cores were coated with pyrolytic carbon. The mean coherence domain size estimated by the Scherrer formula was 18 nm. Basic magnetic characteristics were measured at 20 °C: HC = 42.0 kA/m; σ_r = 31.2 A m2/kg; σ_s = 95.7 A.m2/kg (at 1200 kA/m). The Curie temperature Tc was 227 °C. Thermally induced phase transformations are discussed. (en) Studujeme nanoprášek obsahující Fe3C získaný metodou laserové pyrolýzy plynné směsi Fe(CO)5 a C2H4. Tento feromagnetický nanoprášek byl studován pomocí RTG, HRTEM a magnetických měření. V nanoprášku byly identifikovány agregované nanočástice s morfologií jádro-slupka; Fe3C jádra byla pokryta pyrolytickým uhlíkem. Střední velikost koherentní domény pro Fe3C byla odhadnuta pomocí Scherrerovy formule na 18 nm. Základní magnetické parametry byly změřeny při 20 °C: Hc = 42.0 kA/m; σ_r = 31.2 A.m2/kg; σ_s = 95.7 A.m2/kg (at 1200 kA/m). Curieova teplota Tc vzorku byla 227 °C. Diskutujeme fázové transformace probíhající ve vzorku při vyšších teplotách. (cs)
Title	Fe3C nanopowder synthesized by laser pyrolysis and its annealing behaviour Fe3C nanopowder synthesized by laser pyrolysis and its annealing behaviour (en) Fe3C nanoprášek syntetizovaný laserovou pyrolýzou a jeho chování při žíhání (cs)
skos:prefLabel	Fe3C nanopowder synthesized by laser pyrolysis and its annealing behaviour Fe3C nanopowder synthesized by laser pyrolysis and its annealing behaviour (en) Fe3C nanoprášek syntetizovaný laserovou pyrolýzou a jeho chování při žíhání (cs)
skos:notation	RIV/68081723:_____/06:00045337!RIV07-AV0-68081723
http://linked.open.../vavai/riv/strany	482;485
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(1M0512), P(IAA1041404), Z(AV0Z20410507), Z(AV0Z40320502)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	David, Bohumil Schneeweiss, Oldřich Pizúrová, Naděžda
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	475750
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/06:00045337
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	nanoparticles; laser pyrolysis; Fe3C (en)
http://linked.open.../riv/klicoveSlovo	laser pyrolysis nanoparticles Fe3C
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[9F48B1C5ABC3]
http://linked.open...i/riv/nazevZdroje	Surface and Interface Analysis
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Research center of powdered nanomaterials Atomic ordering at surfaces and interfaces of alloys of 3d metals
http://linked.open...UplatneniVysledku	2006
http://linked.open...v/svazekPeriodika	38
http://linked.open...iv/tvurceVysledku	Bezdička, Petr David, Bohumil Klementová, Mariana Schneeweiss, Oldřich Pizúrová, Naděžda Morjan, I. Alexandrescu, R. Dumitrache, F.
http://linked.open...n/vavai/riv/zamer	Physical properties of advanced materials in relation to their microstructure and processing Design, syntéza a charakterizace klastrů, kompozitů, komplexů a dalších sloučenin na bázi anorganických látek; mechanismy a kinetika jejich interakcí
issn	0142-2421
number of pages	4 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Fe3C nanopowder synthesized by laser pyrolysis and its annealing behaviour Fe3C nanopowder synthesized by laser pyrolysis and its annealing behaviour

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