Studies on Nanostructure and Magnetic Behaviors of Mn-Doped Black Iron Oxide Magnetic Fluids Synthesized from Iron Sand

Taufiq, Ahmad; Sunaryono, Sunaryono; Hidayat, Nurul; Hidayat, Arif; Putra, Edy Giri Rachman; Okazawa, Atsushi; Watanabe, Isao; Kojima, Naoya; Pratapa, Suminar; Darminto, Darminto

doi:10.1142/s1793292017501107

Cited by 40 publications

(27 citation statements)

References 55 publications

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“…Such data provides information that the Fe ions consisting of Fe 2+ and Fe 3+ are randomly placed in the spinel system, which corresponds to the X-ray diffraction data. In line with the FTIR data, the previous work presented that the Fe 3 O 4 particles formed a single phase in a spinel cubic structure [31,36]. 1 present SANS profiles of the samples and their data analysis results.…”

Section: Resultssupporting

confidence: 78%

“…Moreover, the interparticle interactions of the magnetic nanoparticles also play an essential role in the aggregation process. It means that the Fe 3 O 4 powders have similar primary particles with the magnetic fluids [31,32]. However, the Fe 3 O 4 powders constructed bigger particles as clusters or secondary particles with a higher fractal dimension than magnetic fluids.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the analytical grades of TMAH from Sigma-Aldrich and H 2 O were also employed as a surfactant and dispersing agents respectively, to make stable Fe 3 O 4 ferrofluids. The details of the experimental procedure for producing Fe 3 O 4 powders and ferrofluids were reported in our previous works [31][32][33]. Finally, the dilution of Fe 3 O 4 ferrofluids with liquid carrier specified by volume composition of H 2 O and Fe 3 O 4 ferrofluids were 0:1, 1:1, 1:2 and 1:5 respectively.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Nanostructure and Magnetic Field Ordering in Aqueous Fe3O4 Ferrofluids: A Small-Angle Neutron Scattering Study

et al. 2019

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Despite the importance of reducing production costs, investigating the hierarchical nanostructure and magnetic field ordering of Fe 3 O 4 ferrofluids is also important to improve its application performance. Therefore, we proposed an inexpensive synthesis method in producing the Fe 3 O 4 ferrofluids and investigated their detailed nanostructure as the effect of liquid carrier composition as well as their magnetic field ordering. In the present work, the Fe 3 O 4 ferrofluids were successfully prepared through a coprecipitation route using a central precursor of natural Fe 3 O 4 from iron sand. The nanostructural behaviors of the Fe 3 O 4 ferrofluids, as the effects of the dilution of the Fe 3 O 4 particles with H 2 O as a carrier liquid, were examined using a small-angle neutron spectrometer (SANS). The Fe 3 O 4 nanopowders were also prepared for comparison. A single lognormal spherical distribution and a mass fractal model were applied to fit the neutron scattering data of the Fe 3 O 4 ferrofluids. The increasing carrier liquid composition of the fluids during dilution process was able to reduce the fractal dimension and led to a shorter length of aggregation chains. However, it did not change the size of the primary particles or building block (approximately 3.8 nm) of the Fe 3 O 4 particles. The neutron scattering of the Fe 3 O 4 ferrofluids under an external magnetic field in the range of 0 to 1 T exhibited in a standard way of anisotropic phenomenon originating from the nanostructural ordering of the Fe 3 O 4 particles. On the other hand, the Fe 3 O 4 powders did not show anisotropic scattering under an external field in the same range. Furthermore, the magnetization curve of the Fe 3 O 4 ferrofluids and nanopowders exhibited a proper superparamagnetic character at room temperature with the respective saturation magnetization of 4.4 emu/g and 34.7 emu/g.

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Section: Resultssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

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Nanostructure and Magnetic Field Ordering in Aqueous Fe3O4 Ferrofluids: A Small-Angle Neutron Scattering Study

et al. 2019

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“…Black iron oxide: According to Taufiq et al , black iron oxide can be synthesized from natural magnetite by using co‐precipitation method at room temperature, and then characterized by SANS spectrometer and SQUID magnetometer. Shen et al designed an experiment by using ferrous and ferric sulphate mixture to prepare nanometre‐sized black iron oxide pigment with NaOH as precipitant.…”

Section: Introductionmentioning

confidence: 99%

Designing high‐performance colour cosmetics through optimization of powder flow characteristics

Liu

Drakontis

Amin

2020

Intern J of Cosmetic Sci

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Objective Explore the impact of powder flow properties such as flow energy and compressibility on the performance characteristics of foundation powders such as cake strength and pay‐off. Methods FT4 Powder Rheometer from Freeman Technology was utilized to explore various powder compositions. The three major tests performed were flowability test, compressibility test and shear cell test. Results The results highlight that the sample which has higher compressibility has the better cake strength, and the sample which requires lower total energy has better pay‐off. Particles or samples with lower total flow energy, should have easier flow, therefore, should have better pay‐off. Samples and components with higher compressibility, should hold the structure better, therefore, should have better cake strength. Talc has the highest compressibility and lowest flow energy. Foundation sample 5 has the highest concentration of talc and also has the best performance. Conclusion The lower the total flow energy, the easier it is for the powder to flow, and have better pay‐off. Powder compressibility correlates with cake strength which means that a sample with better compressibility consequently has the better cake strength. Samples 5 and 10 require less total flow energy, have lower shear stress, and higher compressibility, therefore, have better final performance. Both samples 5 and 10 have higher talc concentrations compared to other formulations.

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“…The SAXS profiles were fitted using mathematical models as well as the form factor P(q,R), structure factor S(q,R) , intensity I ( q ), and distribution of particle size f(R), as shown in Eqs. (5) , (6) , (7) , and (8) [ 18 , 27 ]:

where q is the scattering vector, R is the particle size, σ is the polydispersity index, R 1 is the primary particles, R 2 is the secondary particles, R o is the mean particle radii, N is the normalization factor, ξ is the cutoff length from fractal correlation, and D is the fractal dimension [ 20 ]. In general, the ferrofluids with a single surfactant stabilization have particle size distribution along with a polydisperse character and chain-like structure [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Mn1Zn Fe2O4 ferrofluids from natural sand for magnetic sensors and radar absorbing materials

Taufiq

Bahtiar²,

Saputro

et al. 2020

Heliyon

Self Cite

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Mn 1- x Zn x Fe 2 O 4 ferrofluids were produced from natural sand for magnetic sensors and radar absorbing materials. The X-ray diffraction data showed that the Zn partially substituted the Mn and Fe ions to construct a spinel structure. The increasing Zn composition decreased the lattice parameters of the structure. The transmission electron microscopy images showed that the filler Mn 1- x Zn x Fe 2 O 4 nanoparticles tended to agglomerate in three dimensions. Lognormal and mass fractal models were used to fit the small-angle X-ray scattering data of the ferrofluids demonstrated that the ferrofluids formed chain-like structures with a fractal dimension of 1.12–1.67 that was constructed from primary particles with sizes of 3.6–4.1 nm. The filler, surfactant, and carrier liquid of the ferrofluids were confirmed by the functional groups of the metal oxides, tetramethylammonium hydroxide, and H 2 O, respectively. The secondary particles contributed to the saturation magnetization of the Mn 1- x Zn x Fe 2 O 4 ferrofluids. The Mn 1- x Zn x Fe 2 O 4 ferrofluids demonstrated excellent performance as magnetic sensors with high stability, especially compared with MnFe 2 O 4 ferrofluids. Furthermore, the ferrofluids exhibited excellent radar absorbing materials. The Mn 1- x Zn x Fe 2 O 4 ferrofluids prepared in this work may serve as a future platform for advancing magnetic sensors and radar absorbing materials.

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Studies on Nanostructure and Magnetic Behaviors of Mn-Doped Black Iron Oxide Magnetic Fluids Synthesized from Iron Sand

Cited by 40 publications

References 55 publications

Nanostructure and Magnetic Field Ordering in Aqueous Fe3O4 Ferrofluids: A Small-Angle Neutron Scattering Study

Nanostructure and Magnetic Field Ordering in Aqueous Fe3O4 Ferrofluids: A Small-Angle Neutron Scattering Study

Designing high‐performance colour cosmetics through optimization of powder flow characteristics

Fabrication of Mn1Zn Fe2O4 ferrofluids from natural sand for magnetic sensors and radar absorbing materials

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