About: Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis.

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About: Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis. Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A composite based on 3d metals particles embedded in MgO matrix is a promising material for application in sensors using high magnetoresistance. We prepared Mg-Fe-Ni nanocomposite using spark synthesis of the pure Mg, and permalloy (Ni3Fe) electrodes. The magnetic separation and sedimentation treatments were used for separation of nanocrystalline parts from the as-prepared powders. In the as-prepared powder, a-Fe + g-Ni3Fe, Fe(Ni) in Mg, and FeO phases were determined using the Mössbauer phase analysis. Some of the phases were confirmed by the x-ray diffraction measurements. The TG/DTA results indicate presence nanoparticles of Fe-Ni hydrides and high adsorption capacity of moisture and air gases. Temperature dependence of magnetization shows spin-glass like behaviour of the sample. Transformation of the Fe(Ni) in Mg phase and the hydride phases into a-Fe + g Ni3Fe and simultaneously an increasing in FeO + MgO were observed after annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2). A composite based on 3d metals particles embedded in MgO matrix is a promising material for application in sensors using high magnetoresistance. We prepared Mg-Fe-Ni nanocomposite using spark synthesis of the pure Mg, and permalloy (Ni3Fe) electrodes. The magnetic separation and sedimentation treatments were used for separation of nanocrystalline parts from the as-prepared powders. In the as-prepared powder, a-Fe + g-Ni3Fe, Fe(Ni) in Mg, and FeO phases were determined using the Mössbauer phase analysis. Some of the phases were confirmed by the x-ray diffraction measurements. The TG/DTA results indicate presence nanoparticles of Fe-Ni hydrides and high adsorption capacity of moisture and air gases. Temperature dependence of magnetization shows spin-glass like behaviour of the sample. Transformation of the Fe(Ni) in Mg phase and the hydride phases into a-Fe + g Ni3Fe and simultaneously an increasing in FeO + MgO were observed after annealing in vacuum (10-3 Pa) or in the protective atmosphere (H2). (en)
Title	Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis. Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis. (en)
skos:prefLabel	Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis. Structure and Properties of Mg-Ni-Fe Based Nanaocomposite Prepared by Spark Synthesis. (en)
skos:notation	RIV/68081723:_____/01:07013271!RIV/2003/AV0/A07003/N
http://linked.open.../vavai/riv/strany	48
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/01/0668), P(GV202/98/K002), P(KSK1010104), P(ME 209), Z(AV0Z2041904), Z(AV0Z4032918)
http://linked.open...vai/riv/dodaniDat	2003
http://linked.open...aciTvurceVysledku	Schneeweiss, Oldřich Žák, Tomáš Jirásková, Yvonna
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 materiálů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	697477
http://linked.open...ai/riv/idVysledku	RIV/68081723:_____/01:07013271
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	nanomaterials; magnetic properties; Mössbauer spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	Mössbauer spectroscopy magnetic properties nanomaterials
http://linked.open...ontrolniKodProRIV	[FBCFD16516B0]
http://linked.open...v/mistoKonaniAkce	Maatsricht [NL]
http://linked.open...i/riv/mistoVydani	Nijmegen
http://linked.open...i/riv/nazevZdroje	SMARTON 5 Workshop: Functional Surfaces and Materials. Exploring the Vectorial World.
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...ocetUcastnikuAkce	0 (xsd:int)
http://linked.open...nichUcastnikuAkce	0 (xsd:int)
http://linked.open...vavai/riv/projekt	Condensed matter physics and materials science Relation between structure, electric and magnetic parameters of nanocrystalline and gradient materials and their diffusibility and solubility for gases http://linked.opendata.cz/resource/domain/vavai/projekt/ME%20209 Measuring station for materials research with application of synchrotron radiation
http://linked.open...UplatneniVysledku	2001
http://linked.open...iv/tvurceVysledku	Bezdička, Petr Schneeweiss, Oldřich Žák, Tomáš Jirásková, Yvonna Večerníková, Eva
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2001-11-15 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Synthesis and structure of novel (inorganic) compounds, clusters and composites; mechanisms of conversion and transfer in systems involving inorganic substance Behavior and properties of metallic and non-metallic materials in relation to their structure, research on processes leading to degradation of material quality
number of pages	1 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Katholieke Universiteit Nijmegen

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