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In recent years, powdered materials have been often used in various industries. Among the various uses of powders, we focused on the conveyance of the developer in the printers. Screw conveyors are commonly used in the printer for the conveyance of the developer. However, this presents the problems such as the condensation of the developer by the shearing force and the temperature rise. Thus, low...
We have been investigating functionally graded materials (FGM) with the purpose of controlling and relaxing electric field in solid insulator of electric power apparatus. FGM is characterized by the spatial distribution of dielectric permittivity in a solid insulator, and can control the surrounding electric field distribution in power apparatus such as gas insulated switchgears (GIS) and epoxy mold...
For the electric field control, relaxation and optimization in a solid insulator of electric power apparatus, we have been investigating functionally graded materials (FGM) with spatial distribution of dielectric permittivity (εr). We have so far developed the fabrication and simulation techniques of FGM with a cylindrical shape for post-type solid insulator of gas insulated switchgears (GIS). In...
In order to derive the specific properties of polymer nanocomposites, we investigated the influence of the dispersibility of nanoparticles on dielectric property. Experiments were carried out for epoxy/alumina nanocomposites with the particle dispersion techniques using ultrasonic wave (USW) and centrifugal force (CF). In this paper, by controlling the application duration of ultrasonic wave, we investigated...
For the application of nanocomposite materials to solid insulator in electric power apparatus, we investigated the influence of the dispersibility of nanoparticles on dielectric property. Experiments were carried out in epoxy/alumina nanocomposites with the particle dispersion techniques using ultrasonic wave and centrifugal force. As the result, we verified the specific characteristics of dielectric...
For applications of nanocomposite materials to solid insulator for electric power apparatus, we have to consider various characteristics from mechanical, thermal and electrical points of view. In particular, the agglomerate of nanoparticles would decline the excellent properties of nanocomposite. In this paper, we investigated the influence of dispersibility of nanoparticles on electrical properties...
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