Size dependence of magnetorheological properties of cobalt ferrite ferrofluid

Radhika, B.; Sahoo, Rasmita; Srinath, S.

doi:10.1063/1.4917808

Cited by 2 publications

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“…Multiple magnetic materials, such as iron (II, III) oxide (Fe 3 O 4 ) [15,16], calcium iron oxide (CaFe 2 O 4 ) [17], manganese ferrite (MnFe 2 O 4 ) [18], cobalt ferrite (CoFe 2 O 4 ) [19], and magnesium ferrite (MgFe 2 O 4 ) [20], have been studied for use in MRF. However, of these materials, carbonyl iron particles (CIP) draw considerable attention due to their soft magnetic characteristics and high magnetic saturation [21,22].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Sr-CoFe2O4 Nanoparticles with Different Particles Sized as Additives in CIP-Based Magnetorheological Fluid

et al. 2021

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This study investigated the effect of adding strontium (Sr)-doped cobalt ferrite (CoFe2O4) nanoparticles in carbonyl iron particle (CIP)-based magnetorheological fluids (MRFs). Sr-CoFe2O4 nanoparticles were fabricated at different particle sizes using co-precipitation at calcination temperatures of 300 and 400 °C. Field emission scanning electron microscopy (FESEM) was used to evaluate the morphology of the Sr-CoFe2O4 nanoparticles, which were found to be spherical. The average grain sizes were 71–91 nm and 118–157 nm for nanoparticles that had been calcinated at 300 and 400 °C, respectively. As such, higher calcination temperatures were found to produce larger-sized Sr-CoFe2O4 nanoparticles. To investigate the rheological effects that Sr-CoFe2O4 nanoparticles have on CIP-based MRF, three MRF samples were prepared: (1) CIP-based MRF without nanoparticle additives (CIP-based MRF), (2) CIP-based MRF with Sr-CoFe2O4 nanoparticles calcinated at 300 °C (MRF CIP+Sr-CoFe2O4-T300), and (3) CIP-based MRF with Sr-CoFe2O4 nanoparticles calcinated at 400 °C (MRF CIP+Sr-CoFe2O4-T400). The rheological properties of these MRF samples were then observed at room temperature using a rheometer with a parallel plate at a gap of 1 mm. Dispersion stability tests were also performed to determine the sedimentation ratio of the three CIP-based MRF samples.

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Section: Introductionmentioning

confidence: 99%

The Effect of Sr-CoFe2O4 Nanoparticles with Different Particles Sized as Additives in CIP-Based Magnetorheological Fluid

et al. 2021

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“…Among these spinel ferrites, CoFe 2 O 4 has been proven to increase the rheological properties of MRF. CoFe 2 O 4 is known as a spinel ferrite that has moderate magnetic saturation, high coercivity, high Currie point, large magnetostrictive and high mechanical hardness [38][39][40][41][42][43]. However, CoFe 2 O 4 has the nature of hard magnetic properties that had high coercivity.…”

Section: Introductionmentioning

confidence: 99%

The effect of Mn_xCo_(1-x)Fe₂O₄ with x = 0, 0.25 and 0.5 as nanoparticles additives in magnethorheological fluid

Nugroho

Ubaidillah

Purnama

et al. 2020

Smart Mater. Struct.

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This study focused on the effect of manganese substituted cobalt ferrite (Mn x Co 1-x Fe 2 O 4 ) nanoparticles with different mole ratios (x = 0, 0.25 and 0.5) in magnetorheological fluids (MRF). The nanoparticles were synthesized using co-precipitation method. The irregularly-spherical form of the nanoparticles was observed/confirmed using a field emission scanning (FESEM) microscope. The vibrating sample magnetometer (VSM) was performed to analyze the effect of nanoparticles in MRF on their magnetic properties. The VSM test results show that the nanoparticles have a negative effect on the magnetic properties of MRF. The higher magnetic saturation of nanoparticles will reduce more magnetic saturation in MRF. This phenomenon shows that the direction of the magnetic field from the cobalt manganese ferrite has the opposite direction to MRF. It is also identified that the field-dependent rheological properties of MRF show that the addition of nanoparticles increases the yield stress of MRF results except for Mn 0.5 Co 0.5 Fe 2 O 4 which leads to the reduction of the yield stress of MRF.

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Size dependence of magnetorheological properties of cobalt ferrite ferrofluid

Cited by 2 publications

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The Effect of Sr-CoFe2O4 Nanoparticles with Different Particles Sized as Additives in CIP-Based Magnetorheological Fluid

The Effect of Sr-CoFe2O4 Nanoparticles with Different Particles Sized as Additives in CIP-Based Magnetorheological Fluid

The effect of Mn_xCo_(1-x)Fe₂O₄ with x = 0, 0.25 and 0.5 as nanoparticles additives in magnethorheological fluid

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Size dependence of magnetorheological properties of cobalt ferrite ferrofluid

Cited by 2 publications

References 0 publications

The Effect of Sr-CoFe2O4 Nanoparticles with Different Particles Sized as Additives in CIP-Based Magnetorheological Fluid

The Effect of Sr-CoFe2O4 Nanoparticles with Different Particles Sized as Additives in CIP-Based Magnetorheological Fluid

The effect of MnxCo(1-x)Fe2O4 with x = 0, 0.25 and 0.5 as nanoparticles additives in magnethorheological fluid

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The effect of Mn_xCo_(1-x)Fe₂O₄ with x = 0, 0.25 and 0.5 as nanoparticles additives in magnethorheological fluid