Готові списки джерел за темами / Soft magnetic nanofibers

Добірка наукової літератури з теми "Soft magnetic nanofibers"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Soft magnetic nanofibers"

1

Liao, Yuan, Shu Hua Qi, Dong Hong Wang, and You Ming Wu. "Synthesis and Electromagnetic Properties of Polyaniline Nanofibers Using Polyglycol as ‘Soft’ Template in the Aqueous Ethanol." Advanced Materials Research 79-82 (August 2009): 309–12. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.309.

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Анотація:
In this paper Polyglycol (PG) was used as ‘soft’ template to induce the polymerization of aniline in aqueous ethanol and hence control both the nucleation and growth of polyaniline (PANI) nanofibers. The products were characterized by Transmission electro microscope (TEM) and X-ray diffraction (XRD) techniques. TEM photos showed that the diameter of PANI nanofibers synthesized in pure water is 100nm while that of PANI nanofibers synthesized in aqueous ethanol is 50nm. It revealed that the volume fraction of ethanol showed really important effect on the morphological parameters of the PANI nanofibers. The X-ray diffraction patterns of the PANI nanofibers showed high crystallinity. Moreover, the resulting PANI nanofibers exhibited an unusual electromagnetic loss at the microwave frequency (f = 8.2~12.4 GHz) . Compared with 1.79, the highest electrical loss, tanδe, of the microparticles PANI at 8.47 GHz and 0.72, the highest magnetic loss, tanδm at 10.93 GHz, it was noted that the highest electrical loss, tanδe, of PANI nanofibers reached 3.26 at 10.4 GHz, and the highest magnetic loss, tanδm, was 2.85 at 9.35 GHz. It might arise from order arrangement of polaron as charge carrier caused by nanofibers morphology and can be used for the potential application as microwave absorbing materials.
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2

Araujo, R. N., E. P. Nascimento, H. B. Sales, M. R. Silva, G. A. Neves, and R. R. Menezes. "CaFe2O4 ferrite nanofibers via solution blow spinning (SBS)." Cerâmica 66, no. 380 (December 2020): 467–73. http://dx.doi.org/10.1590/0366-69132020663802932.

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Abstract CaFe2O4 nanofibers were successfully synthesized via solution blow spinning (SBS), and the influences of heat-treatment on morphological, microstructural, magnetic, and optical properties of the nanofibers were evaluated. In the synthesis process, stoichiometric amounts of iron and calcium nitrates were dissolved in an aqueous solution containing polyvinylpyrrolidone (PVP) and, after that, hybrid nanofibers (PVP/precursors) were produced by SBS. The hybrid nanofibers were calcined and then subjected to microstructural, morphological, and magnetic characterizations. The results evidenced that the fibers presented the crystalline nature of the single-phase CaFe2O4, with a crystallite size of 32.7 and 34.4 nm for the samples calcined at 800 and 1000 °C, respectively. The CaFe2O4 fibers calcined at 600 and 800 °C presented a homogeneous morphology, without beads, and mean diameters of 521 and 427 nm, respectively. The results also revealed nanofibers with low band gaps of approximately 1.98 eV and characteristics of soft magnetic materials.
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3

Strečková, Magdaléna, Mária Fáberová, Radovan Bureš, and Pavel Kurek. "The Preparation of Soft Magnetic Composites Based on FeSi and Ferrite Fibers." Powder Metallurgy Progress 16, no. 2 (December 1, 2016): 107–16. http://dx.doi.org/10.1515/pmp-2016-0009.

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Анотація:
Abstract The fields of soft magnetic composites and powder metallurgy technologies have a powerful potential to redesign the way of electric motor preparation, and will continue to grow for years to come. A design of the novel soft microcomposite material composed of spherical FeSi particles and Ni0.3Zn0.7Fe2O4 ferrite nanofibers is reported together with a characterization of basic mechanical and electrical properties. The needle-less electrospinning method was used for a preparation of Ni0.3Zn0.7Fe2O4 ferrite nanofibers, which has a spinel-type crystal structure as verified by XRD and TEM analysis. The dielectric coating was prepared by mixing of nanofibers with glycerol and ethanol because of safe manipulation with fumed fibers and homogeneous distribution of the coating around the FeSi particle surface. The final microcomposite samples were prepared by a combination of the traditional PM compaction technique supplemented with a conventional sintering process of the prepared green compacts. The composition and distribution of the secondary phase formed by the spinel ferrite fibers were examined by SEM. It is demonstrated that the prepared composite material has a tight arrangement without any significant porosity, which manifest itself through superior mechanical properties (high mechanical hardness, Young modulus, and transverse rupture strength) and specific electric resistivity compared to the related composite materials including resin as the organic binder.
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4

Khunová, Viera, David Pavliňák, Ivo Šafařík, Martin Škrátek, and František Ondreáš. "Multifunctional Electrospun Nanofibers Based on Biopolymer Blends and Magnetic Tubular Halloysite for Medical Applications." Polymers 13, no. 22 (November 9, 2021): 3870. http://dx.doi.org/10.3390/polym13223870.

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Tubular halloysite (HNT) is a naturally occurring aluminosilicate clay with a unique combination of natural availability, good biocompatibility, high mechanical strength, and functionality. This study explored the effects of magnetically responsive halloysite (MHNT) on the structure, morphology, chemical composition, and magnetic and mechanical properties of electrospun nanofibers based on polycaprolactone (PCL) and gelatine (Gel) blends. MHNT was prepared via a simple modification of HNT with a perchloric-acid-stabilized magnetic fluid–methanol mixture. PCL/Gel nanofibers containing 6, 9, and 12 wt.% HNT and MHNT were prepared via an electrospinning process, respecting the essential rules for medical applications. The structure and properties of the prepared nanofibers were studied using infrared spectroscopy (ATR-FTIR) and electron microscopy (SEM, STEM) along with energy-dispersive X-ray spectroscopy (EDX), magnetometry, and mechanical analysis. It was found that the incorporation of the studied concentrations of MHNT into PCL/Gel nanofibers led to soft magnetic biocompatible materials with a saturation magnetization of 0.67 emu/g and coercivity of 15 Oe for nanofibers with 12 wt.% MHNT. Moreover, by applying both HNT and MHNT, an improvement of the nanofibers structure was observed, together with strong reinforcing effects. The greatest improvement was observed for nanofibers containing 9 wt.% MHNT when increases in tensile strength reached more than two-fold and the elongation at break reached a five-fold improvement.
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5

Barakat, Nasser A. M., Khalil A. Khalil, Ibrahim H. Mahmoud, Muzafar A. Kanjwal, Faheem A. Sheikh, and Hak Yong Kim. "CoNi Bimetallic Nanofibers by Electrospinning: Nickel-Based Soft Magnetic Material with Improved Magnetic Properties." Journal of Physical Chemistry C 114, no. 37 (August 31, 2010): 15589–93. http://dx.doi.org/10.1021/jp1041074.

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6

Dakova, L', J. Fuzer, S. Dobak, P. Kollar, Y. Osadchuk, M. Streckova, M. Faberova, R. Bures, P. Kurek, and M. Vojtko. "Analysis of Magnetic Losses and Complex Permeability in Novel Soft Magnetic Composite With Ferrite Nanofibers." IEEE Transactions on Magnetics 54, no. 12 (December 2018): 1–6. http://dx.doi.org/10.1109/tmag.2018.2866814.

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7

Dong, Juan, Yi Zhang, Xinlei Zhang, Qingfang Liu, and Jianbo Wang. "Improved magnetic properties of SrFe12O19/FeCo core–shell nanofibers by hard/soft magnetic exchange–coupling effect." Materials Letters 120 (April 2014): 9–12. http://dx.doi.org/10.1016/j.matlet.2014.01.022.

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8

Lee, Jimin, Gyutae Lee, Tae-Yeon Hwang, Hyo-Ryoung Lim, Hong-Baek Cho, Jongryoul Kim, and Yong-Ho Choa. "Phase- and Composition-Tunable Hard/Soft Magnetic Nanofibers for High-Performance Permanent Magnet." ACS Applied Nano Materials 3, no. 4 (February 17, 2020): 3244–51. http://dx.doi.org/10.1021/acsanm.9b02470.

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9

Song, Fuzhan, Xiangqian Shen, Mingquan Liu, and Jun Xiang. "Microstructure, magnetic properties and exchange–coupling interactions for one-dimensional hard/soft ferrite nanofibers." Journal of Solid State Chemistry 185 (January 2012): 31–36. http://dx.doi.org/10.1016/j.jssc.2011.10.009.

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10

Seah, Tzu Hui, and Martin Pumera. "Platelet graphite nanofibers/soft polymer composites for electrochemical sensing and biosensing." Sensors and Actuators B: Chemical 156, no. 1 (August 2011): 79–83. http://dx.doi.org/10.1016/j.snb.2011.03.075.

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