Electrical properties of MgO-ZrO2 insulating coatings on different types of epoxies
The insulating coating of MgO-ZrO2 was coated on Stainless-Steel-304 (SS) tapes by reel-to-reel sol-gel process for investigation of electrical properties under various pressures at room temperature (298 K) and liquid nitrogen temperature (77 K) for HTS/LTS high field insert coil. Solutions were...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2007
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/c269419ba0ed4541bd85e65ea019bd6e |
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| Sumario: | The insulating coating of MgO-ZrO2 was coated on Stainless-Steel-304 (SS) tapes by
reel-to-reel sol-gel process for investigation of electrical properties under various pressures at
room temperature (298 K) and liquid nitrogen temperature (77 K) for HTS/LTS high field
insert coil. Solutions were prepared by using Mg and Zr based precursors, solvent and chelating agent, then the insulation was made on long-length SS substrate. Insulation thickness for
4, 8, and 12 dippings was determined to be 7, 12, and 15 μm, respectively. Three different
types of stycast, 2850 FT/24 LV Black and Blue, and White Buecher Epoxy Resin were studied. Stycast thicknesses were varied from 32-18 μm, when the pressure was applied from 0
to 0.54 GPa. The thicknesses of insulating coatings and stycast were measured by using Environmental Scanning Electron Microscope (ESEM). Resistance, capacitance and High Voltage
Breakdown (HVbd) of the samples were measured by using standard equipment. Then, dielectric constant and electric strength were calculated. An analytical model was modified by the
experimental data. The results were presented graphically. |
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