Heat generation ability in AC magnetic field of MgAlxFe2-xO4 ferrite powder prepared by sol-gel method

2016 ◽  
Author(s):  
Hideyuki Hirazawa ◽  
Yoshiki Ito ◽  
Deleg Sangaa ◽  
Namsrai Tsogbadrakh ◽  
Hiromichi Aono ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Generation ◽  
Sol Gel ◽  
Ferrite Powder ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ac Magnetic Field

scholarly journals Self-standing magnetic composite nanosheets prepared in the presence of an external magnetic field: Characterization and potential for medical applications

2020 ◽  
pp. 174751982095860
Author(s):  
Mina Sakuragi ◽  
Yoshikazu Takahashi ◽  
Keito Ehara ◽  
Katsuki Kusakabe
Keyword(s):  
Magnetic Field ◽  
Thermal Decomposition ◽  
External Magnetic Field ◽  
Decomposition Method ◽  
Sol Gel ◽  
Magnetic Composite ◽  
Magnetic Response ◽  
Gel Method ◽  
Sol Gel Method ◽  
Thermal Decomposition Method

The aim of this study is to develop self-standing, ultrathin film, nanosheets with high magnetic response for use in a medical device that can be migrated to a target location in the body by using an external magnetic field. First, iron oxide nanoparticles are synthesized by either the sol-gel method or thermal decomposition. The resulting magnetic properties of the nanoparticles show that the thermal decomposition method provides a greater saturation magnetization value than the sol-gel method. Next, the nanoparticles obtained by the thermal decomposition method are embedded into nanosheets of poly(L-lactide) at varying concentrations. Embedding of the nanoparticles in the composite nanosheets is achieved by the application of an external magnetic field. The composite nanosheets are then characterized. The thickness of the nanosheet increases, and the nanoparticles are well dispersed, with an increase in poly (L-lactide) concentration. The NP-embedded nanosheets are imaged by transmission electron microscopy, which reveals thin, long aggregates aligned in collinear line features. X-ray diffraction results indicate that the magnetic hard axis of the nanoparticles in the nanosheets is aligned in parallel to the plane of the nanosheet by magnetic field application during nanosheet preparation. In addition, the nanosheets at high poly (L-lactide) concentrations that had been subjected to a magnetic field during preparation show a slightly greater magnetic response compared with both nanosheets without magnetic field exposure and nanosheets prepared at low poly (L-lactide) concentrations.

The Heat Generation Behavior for Y3Fe5O12 Ferrite Powder with Addition of Lanthanum in an AC Magnetic Field

2015 ◽  
Vol 44 (10) ◽  
pp. 1298-1299
Author(s):  
Hideyuki Hirazawa ◽  
Syo Yoshikawa ◽  
Hiromichi Aono ◽  
Takashi Naohara ◽  
Tsunehiro Maehara ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Generation ◽  
Ferrite Powder ◽  
Ac Magnetic Field

Annealing effects on the crystal growth and the magnetic properties of Mn0.8Zn0.1Ni0.1Fe2O4 ferrite powder grown by using the sol-gel method

2012 ◽  
Vol 60 (5) ◽  
pp. 795-799 ◽  
Author(s):  
Jeoung Yun Kang ◽  
Woo Hyun Kwon ◽  
Seung Wha Lee ◽  
Jae-Gwang Lee ◽  
Byung-Sub Kang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Crystal Growth ◽  
Sol Gel ◽  
Ferrite Powder ◽  
Gel Method ◽  
Sol Gel Method ◽  
Annealing Effects

Heat generation ability in AC magnetic field of nano MgFe2O4-based ferrite powder prepared by bead milling

2011 ◽  
Vol 323 (6) ◽  
pp. 675-680 ◽  
Author(s):  
Hideyuki Hirazawa ◽  
Hiromichi Aono ◽  
Takashi Naohara ◽  
Tsunehiro Maehara ◽  
Mitsunori Sato ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Generation ◽  
Ferrite Powder ◽  
Ac Magnetic Field ◽  
Bead Milling

Heat generation ability in AC magnetic field and their computer simulation for Ti tube filled with ferrite powder

2011 ◽  
Vol 323 (1) ◽  
pp. 88-93 ◽  
Author(s):  
Hiromichi Aono ◽  
Takashi Naohara ◽  
Tsunehiro Maehara ◽  
Hideyuki Hirazawa ◽  
Shinya Matsutomo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Computer Simulation ◽  
Heat Generation ◽  
Ferrite Powder ◽  
Ac Magnetic Field

scholarly journals Effect of magnetic field on the synthesis of well-aligned TiO2-5CB by sol-gel method

2017 ◽  
Vol 13 (4) ◽  
pp. 690-692
Author(s):  
Nur Izzati Abu Bakar ◽  
Sheela Chandren ◽  
Nursyafreena Attan ◽  
Leaw Wai Loon ◽  
Hadi Nur
Keyword(s):  
Magnetic Field ◽  
Liquid Crystal ◽  
Sol Gel ◽  
Potential Method ◽  
Ambient Condition ◽  
Drying Process ◽  
Gel Method ◽  
Sol Gel Method ◽  
5Cb Liquid Crystal ◽  
The Magnetic Field

This paper describes the approach by using a magnetic field as a technique in order to synthesize well-aligned materials. The magnetic field technique could be a potential method because it has advantage that all of the materials could be aligned by magnetic field as long as they have magnetic anisotropy. The aim of this research is to explore the effects of magnetic field and magnetic line in the synthesis of well-aligned material, namely titania (TiO2).  The synthesis of well-aligned titania with liquid crystal as the structure-aligning agent is demonstrated under magnetic field in the presence of liquid crystal, 4′-pentyl-4-biphenylcarbonitrile (5CB), tetra-n-butyl orthotitanate (TBOT), 2-propanol and water. The mixture underwent slow hydrolysis and drying process under magnetic field (0.3 T) in ambient condition. The use of magnetic field and 5CB liquid crystal as the structure aligning agent has led to the successful formation of well-aligned TiO2-5CB via sol-gel method. When no magnetic field was applied, the TiO2-5CB obtained was spherical in shape and no alignment can be observed. This study demonstrated that magnetic field can play an important role in the synthesis of well-aligned TiO2-5CB.

High-Heat Generation Ability in AC Magnetic Field for Ti Tube Filled with Ferrite Powder

2006 ◽  
Vol 45 (11) ◽  
pp. 8673-8675 ◽  
Author(s):  
Hideyuki Hirazawa ◽  
Kodai Uchihara ◽  
Hiromichi Aono ◽  
Koichi Hiraoka ◽  
Takashi Naohara ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Generation ◽  
High Heat ◽  
Ferrite Powder ◽  
Ac Magnetic Field
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