Effects of size reduction on the structure and magnetic properties of core-shell Ni3Si/silica nanoparticles prepared by electrochemical synthesis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F14%3A00425774" target="_blank" >RIV/61389005:_____/14:00425774 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jallcom.2013.09.035" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2013.09.035</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2013.09.035" target="_blank" >10.1016/j.jallcom.2013.09.035</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of size reduction on the structure and magnetic properties of core-shell Ni3Si/silica nanoparticles prepared by electrochemical synthesis

Popis výsledku v původním jazyce

anostructured nickel silicides find application in electronics, high-temperature alloys, electrode materials and catalysis. In this work, the effect of size reduction on the structure and magnetic properties of beta(1)-Ni3Si intermetallic phase nanoparticles is studied. Electrochemical selective phase dissolution (ESPD) was used to produce the beta(1)-Ni3Si nanoparticles of different sizes (from 20 to 215 nm) by extracting beta(1) nano-size precipitates from two-phase Ni-Si and Ni-Si-Al precursor alloys. The extracted nanoparticles have a core-shell structure with beta(1)-Ni3Si core and an amorphous silica shell. Particles size and shape are controlled by the composition and thermal treatment of the precursor alloys. Precipitates size is scaled withoutmodifying the ordered L1(2) lattice structure. The bulk beta(1)-Ni3Si is ferromagnetic below 260 K with low saturation magnetization (2 emu/g), while the core-shell Ni3Si/silica nanoparticles are superparamagnetic at low temperatures (<9

Název v anglickém jazyce

Effects of size reduction on the structure and magnetic properties of core-shell Ni3Si/silica nanoparticles prepared by electrochemical synthesis

Popis výsledku anglicky

anostructured nickel silicides find application in electronics, high-temperature alloys, electrode materials and catalysis. In this work, the effect of size reduction on the structure and magnetic properties of beta(1)-Ni3Si intermetallic phase nanoparticles is studied. Electrochemical selective phase dissolution (ESPD) was used to produce the beta(1)-Ni3Si nanoparticles of different sizes (from 20 to 215 nm) by extracting beta(1) nano-size precipitates from two-phase Ni-Si and Ni-Si-Al precursor alloys. The extracted nanoparticles have a core-shell structure with beta(1)-Ni3Si core and an amorphous silica shell. Particles size and shape are controlled by the composition and thermal treatment of the precursor alloys. Precipitates size is scaled withoutmodifying the ordered L1(2) lattice structure. The bulk beta(1)-Ni3Si is ferromagnetic below 260 K with low saturation magnetization (2 emu/g), while the core-shell Ni3Si/silica nanoparticles are superparamagnetic at low temperatures (<9

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

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Svazek periodika

584

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

119-127

Kód UT WoS článku

000327135400018

EID výsledku v databázi Scopus

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