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Statements

Subject Item
n2:RIV%2F70883521%3A28610%2F13%3A43870101%21RIV14-GA0-28610___
rdf:type
n12:Vysledek skos:Concept
dcterms:description
Magnetorheological (MR) suspensions are generally two-phase systems consisting of magnetic particles and silicone oil. Upon application of an external magnetic field particles become magnetized and form chain-like internal structures, resulting in the change of the rheological behaviour of whole suspension. Viscosity can increase in several orders of magnitude and then return to its original value when magnetic field is replaced. Thus, the viscosity of such suspensions can be controlled using various magnetic field strengths. Reversible change of viscosity can find application in damping systems or torque transducers. This study is aimed on the prepraration of the novel magnetic particles assembled from carbonyl iron (CI) core and ZnO rod-like shell. The hybrid CI/ZnO microparticles were prepared via two-step synthesis. Firstly, the CI particles were seeded with ZnO crystal nuclei and further with the help of hydrothermal synthesis the rod-like structures were formed. Prepared particles were characterized using SEM technique as well as XRD analysis. Further, the magnetic properties of both bare CI particles and CI/ZnO rod-like ones were investigated using vibration magnetization saturation method. The rheological properties of the suspension consiting of bare CI and CI/ZnO rod-like were elucidated in the absence as well as in the presence of the applied external magnetic fiedl strength. The presented core-shell material based suspension exhibited similar MR efficiency in comparison to the supesnsion based on bare CI particles. On the other hand, the thermal stabiliy of the particles was considerably enhanced. Thus, the main aim of this contribution will be focused on the magnetorheological behaviour of novel CI/ZnO rod-like particles, at broad temperature range. Magnetorheological (MR) suspensions are generally two-phase systems consisting of magnetic particles and silicone oil. Upon application of an external magnetic field particles become magnetized and form chain-like internal structures, resulting in the change of the rheological behaviour of whole suspension. Viscosity can increase in several orders of magnitude and then return to its original value when magnetic field is replaced. Thus, the viscosity of such suspensions can be controlled using various magnetic field strengths. Reversible change of viscosity can find application in damping systems or torque transducers. This study is aimed on the prepraration of the novel magnetic particles assembled from carbonyl iron (CI) core and ZnO rod-like shell. The hybrid CI/ZnO microparticles were prepared via two-step synthesis. Firstly, the CI particles were seeded with ZnO crystal nuclei and further with the help of hydrothermal synthesis the rod-like structures were formed. Prepared particles were characterized using SEM technique as well as XRD analysis. Further, the magnetic properties of both bare CI particles and CI/ZnO rod-like ones were investigated using vibration magnetization saturation method. The rheological properties of the suspension consiting of bare CI and CI/ZnO rod-like were elucidated in the absence as well as in the presence of the applied external magnetic fiedl strength. The presented core-shell material based suspension exhibited similar MR efficiency in comparison to the supesnsion based on bare CI particles. On the other hand, the thermal stabiliy of the particles was considerably enhanced. Thus, the main aim of this contribution will be focused on the magnetorheological behaviour of novel CI/ZnO rod-like particles, at broad temperature range.
dcterms:title
Magnetorheology of the carbonyl iron/ZnO rod-like microparticle suspensions Magnetorheology of the carbonyl iron/ZnO rod-like microparticle suspensions
skos:prefLabel
Magnetorheology of the carbonyl iron/ZnO rod-like microparticle suspensions Magnetorheology of the carbonyl iron/ZnO rod-like microparticle suspensions
skos:notation
RIV/70883521:28610/13:43870101!RIV14-GA0-28610___
n12:predkladatel
n18:orjk%3A28610
n3:aktivita
n10:P
n3:aktivity
P(ED2.1.00/03.0111), P(GA202/09/1626)
n3:dodaniDat
n6:2014
n3:domaciTvurceVysledku
n9:7874138 n9:8125562 n9:4964241 n9:8133662
n3:druhVysledku
n11:O
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
85759
n3:idVysledku
RIV/70883521:28610/13:43870101
n3:jazykVysledku
n16:eng
n3:klicovaSlova
Magnetorheology, carbonyl iron, ZnO rod-like particles, magnetic properties, suspensions, rheological properties.
n3:klicoveSlovo
n4:magnetic%20properties n4:carbonyl%20iron n4:Magnetorheology n4:suspensions n4:ZnO%20rod-like%20particles n4:rheological%20properties.
n3:kontrolniKodProRIV
[364E9D5CAF33]
n3:obor
n13:CA
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n7:ED2.1.00%2F03.0111 n7:GA202%2F09%2F1626
n3:rokUplatneniVysledku
n6:2013
n3:tvurceVysledku
Mrlík, Miroslav Machovský, Michal Kuřitka, Ivo Pavlínek, Vladimír
n15:organizacniJednotka
28610