MA34789B1 - Nanoferrites (nanoparticules et nanotiges) à base de nd1-xmxfe204 (n=co,ni,mn et sn) - Google Patents

Nanoferrites (nanoparticules et nanotiges) à base de nd1-xmxfe204 (n=co,ni,mn et sn)

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Publication number
MA34789B1
MA34789B1 MA35010A MA35010A MA34789B1 MA 34789 B1 MA34789 B1 MA 34789B1 MA 35010 A MA35010 A MA 35010A MA 35010 A MA35010 A MA 35010A MA 34789 B1 MA34789 B1 MA 34789B1
Authority
MA
Morocco
Prior art keywords
nanoparticles
transition metals
magnetic properties
ndfe2o4
nanoferrite
Prior art date
Application number
MA35010A
Other languages
Arabic (ar)
English (en)
Inventor
Benyoussef Abdelilah
Hamedoun Mohamed
Mounkachi Omar
Moussaoui Hassan
Original Assignee
Mascir Morrocan Foundation For Advanced Science Innovation & Res
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mascir Morrocan Foundation For Advanced Science Innovation & Res filed Critical Mascir Morrocan Foundation For Advanced Science Innovation & Res
Priority to MA35010A priority Critical patent/MA34789B1/fr
Priority to PCT/MA2013/000004 priority patent/WO2014003527A1/fr
Publication of MA34789B1 publication Critical patent/MA34789B1/fr

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    • H01F1/0036—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties showing low dimensional magnetism, i.e. spin rearrangements due to a restriction of dimensions, e.g. showing giant magnetoresistivity
    • H01F1/0045—Zero dimensional, e.g. nanoparticles, soft nanoparticles for medical/biological use
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    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
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    • C01G45/1221—Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof
    • C01G45/1235—Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof of the type (Mn2O4)2-, e.g. Li2Mn2O4 or Li2(MxMn2-x)O4
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Abstract

Cette invention fournit des matériaux de nanoferrite (en poudre) à base d'un mélange de terre rare, métaux de transition. Les nano-ferrites (nanoparticules et nanorodes) de nd1-xmxfe2o4 (m=co,ni,mn,sn....) spinelles ferrites ont été préparés par la méthode de co-précipitation. La diffraction des rayons drx et l'imagerie par tem confirment une bonne cristallisation des nanorodes pour le cas de ndfe2o4 dopé par des métaux de transition et nanoparticles pour le cas de ndfe2o4 dopé par des terres rares. Les résultats montrent que la distribution cationique sur les sites tétraédriques et octaédriques dans le réseau spinelle est partiellement inverse. Les propriétés magnétiques des échantillons ont été caractérisées en utilisant un dispositif d'interférence supraconducteur quantique (squid). Les propriétés magnétiques monrent que le système a un fort moment de saturation et un champ coercitif modéré à la température ambiante. L'aimantation résiduelle, l'aimantation à saturation, le champ coercitif, la température de blocage, et la température de transition du matériau nanoferrite sont optimisés par la concentration des ions magnétiques la taille et la forme des nanoparticules, afin d'atteindre les caractéristiques requises pour des applications bien définies. Les nanoparticules super paramagnétiques fabriquées sont des matériaux multifonctionnels où la taille et la forme présentent un intérêt pour le couplage magnétique et pour les applications. Ces nanoparticules d'oxyde avec un mélange de métaux de transition et de terre rares sont simples et peu coûteux à fabriquer en grandes quantités avec des propriétés magnétiques uniformes et sous différentes formes; encapsulé, fonctionnalisé ou laissé nu comme un oxyde stable à la température ambiante.
MA35010A 2012-06-28 2012-06-28 Nanoferrites (nanoparticules et nanotiges) à base de nd1-xmxfe204 (n=co,ni,mn et sn) MA34789B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
MA35010A MA34789B1 (fr) 2012-06-28 2012-06-28 Nanoferrites (nanoparticules et nanotiges) à base de nd1-xmxfe204 (n=co,ni,mn et sn)
PCT/MA2013/000004 WO2014003527A1 (fr) 2012-06-28 2013-04-05 Nano-ferrites (nanoparticules et nanorodes) a base de nd1-xmexfe2o4 (m =co, ni, mn,sn)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MA35010A MA34789B1 (fr) 2012-06-28 2012-06-28 Nanoferrites (nanoparticules et nanotiges) à base de nd1-xmxfe204 (n=co,ni,mn et sn)

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MA34789B1 true MA34789B1 (fr) 2014-01-02

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