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Investigation of electrical and magnetic properties of ferro-nanofluid on transformers.

Tsai TH, Chen PH, Lee DS, Yang CT - Nanoscale Res Lett (2011)

Bottom Line: The ferro-nanofluid was fabricated by a chemical co-precipitation method.The experimental results indicated that the inductance and coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration.The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, owing to the phase lag between the external magnetic field and the magnetization of the material.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, No, 1, Sec, 4, Roosevelt Rd,, Taipei 10617, Taiwan. phchen@ntu.edu.tw.

ABSTRACT
This study investigated a simple model of transformers that have liquid magnetic cores with different concentrations of ferro-nanofluids. The simple model was built on a capillary by enamel-insulated wires and with ferro-nanofluid loaded in the capillary. The ferro-nanofluid was fabricated by a chemical co-precipitation method. The performances of the transformers with either air core or ferro-nanofluid at different concentrations of nanoparticles of 0.25, 0.5, 0.75, and 1 M were measured and simulated at frequencies ranging from 100 kHz to 100 MHz. The experimental results indicated that the inductance and coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration. The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, owing to the phase lag between the external magnetic field and the magnetization of the material.

No MeSH data available.


The crystalline phases of Fe3O4 nanoparticles.
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Figure 2: The crystalline phases of Fe3O4 nanoparticles.

Mentions: The shape and size of the Fe3O4 nanoparticles was examined by a transmission electron microscope (TEM). Figure 1 shows the TEM photo of the Fe3O4 nanoparticles. The average diameter of the nanoparticles was approximately 10 nm. The crystalline phases of Fe3O4 nanoparticles were determined by X-ray diffraction, as shown in Figure 2. The magnetic properties of Fe3O4 nanofluid were measured by a vibrating sample magnetometer (VSM). The magnetized curve of the Fe3O4 nanofluid measured by a VSM is shown in Figure 3. The measured results illustrate that the synthesized ferro-nanofluids have the characteristic of super-paramagnetism. The saturated magnetizations of 0.25, 0.5, 0.75, and 1 M Fe3O4 nanofluids were 3.75, 8.85, 12.7, and 16.7 emu/g, respectively.


Investigation of electrical and magnetic properties of ferro-nanofluid on transformers.

Tsai TH, Chen PH, Lee DS, Yang CT - Nanoscale Res Lett (2011)

The crystalline phases of Fe3O4 nanoparticles.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211327&req=5

Figure 2: The crystalline phases of Fe3O4 nanoparticles.
Mentions: The shape and size of the Fe3O4 nanoparticles was examined by a transmission electron microscope (TEM). Figure 1 shows the TEM photo of the Fe3O4 nanoparticles. The average diameter of the nanoparticles was approximately 10 nm. The crystalline phases of Fe3O4 nanoparticles were determined by X-ray diffraction, as shown in Figure 2. The magnetic properties of Fe3O4 nanofluid were measured by a vibrating sample magnetometer (VSM). The magnetized curve of the Fe3O4 nanofluid measured by a VSM is shown in Figure 3. The measured results illustrate that the synthesized ferro-nanofluids have the characteristic of super-paramagnetism. The saturated magnetizations of 0.25, 0.5, 0.75, and 1 M Fe3O4 nanofluids were 3.75, 8.85, 12.7, and 16.7 emu/g, respectively.

Bottom Line: The ferro-nanofluid was fabricated by a chemical co-precipitation method.The experimental results indicated that the inductance and coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration.The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, owing to the phase lag between the external magnetic field and the magnetization of the material.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Mechanical Engineering, National Taiwan University, No, 1, Sec, 4, Roosevelt Rd,, Taipei 10617, Taiwan. phchen@ntu.edu.tw.

ABSTRACT
This study investigated a simple model of transformers that have liquid magnetic cores with different concentrations of ferro-nanofluids. The simple model was built on a capillary by enamel-insulated wires and with ferro-nanofluid loaded in the capillary. The ferro-nanofluid was fabricated by a chemical co-precipitation method. The performances of the transformers with either air core or ferro-nanofluid at different concentrations of nanoparticles of 0.25, 0.5, 0.75, and 1 M were measured and simulated at frequencies ranging from 100 kHz to 100 MHz. The experimental results indicated that the inductance and coupling coefficient of coils grew with the increment of the ferro-nanofluid concentration. The presence of ferro-nanofluid increased resistance, yielding to the decrement of the quality factor, owing to the phase lag between the external magnetic field and the magnetization of the material.

No MeSH data available.