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지원영 한국전기전자재료학회 2001 전기전자재료학회논문지 Vol.14 No.11
The fundamental study on HTV silicone for insulation material has been performed. In order to estimate the chemical behavior of siloxane under high voltage, H-NMR, GPC and vinyl contents measurement were used. As an experimental results, after high voltage stress, the molecular weight of siloxane are increased, the vinyl contents of siloxane are decreased. The dielectric strength of vinyl group containing siloxane was lower than only methyl containing siloxane.
李水夫,崔鍾汶,李峻昊,池源泳 湖西大學校工業技術硏究所 1999 工業技術硏究所論文集 Vol.18 No.-
Polymer insulating materials are widely used in power distribution and transmission systems for their good dielectric properties, light weight, low cost, and good contamination performance. Tracking is one of the biggest problems to be overcome in polymer insulating materials. The alumina trihydrate(ATH) is widely used as a filler for improve the tracking performance of silicone rubber. In this paper, we have investigated the influence of surface treatment of fillers on the tracking performance of silicone insulator using the IEC 587 tracking test method.
Micro Fabrication of Aluminum Oxide Patterns Using Local Anodization
지원영,김장길,주종남 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.1
In this study, a novel process for fabricating micro Al2O3 patterns using local anodization is proposed. On the basis of double layer theory, the anodizing region was localized on an aluminum surface near a micro tool electrode with a small inter-electrode gap. The localized oxide formation process was observed by field emission scanning electron microscope (FE-SEM) including energy dispersive spectroscopy (EDS). It was confirmed that micro-scale localized aluminum oxide was fabricated on the aluminum surface. Features of the anodized oxide line were investigated using different ratios of sulfuric and oxalic acid mixtures at various pulse durations and voltage conditions. The experimental results show that an insulating aluminum oxide line pattern was fabricated on 10 µm aluminum foil. Subsequently, a coplanar waveguide (CPW) micro patch antenna was fabricated and characterized by a PNA network analyzer. The local anodization can be used for fabricating micro-electric circuits without masks and substrate; which will promise the next generation of micro electronic devices.
지원영,이준호 한국고무학회 2002 엘라스토머 및 콤포지트 Vol.37 No.2
고압애자용 실리콘 고무를 제조하기 위해 사용되는 polydimethylsiloxane(PDMS)의 vinyl 기 함량과 실리카의 종류가 전기특성 및 물성에 미치는 영향을 연구하였다. 실리콘 폴리머의 비닐함량이 증가함에 따라 가교밀도와 경도가 높아졌으며 이로 인해 인장강도, 체적저항 및 트래킹 특성이 증가하였다. 건식실리카로 보강된 실리콘 고무가 습식실리카로 보강된 실리콘 고무보다 전기적 특성 및 물성이 우수하였으며 이는 실리카에 존재하는 수분의 함량에 영향을 받는 것을 알 수 있었다. This study was carried out to investigate the influences of the vinyl content of polydimethylsiloxane(PDMS) and type of silica on the electrical and mechanical properties of silicone rubber for high voltage insulation. When the content of vinyl group was increased, cross-linking density and hardness were increased, and tensile strength, volume resistivity and tracking resistance were improved. The mechanical and electrical properties of silicone rubber reinforced with fumed silica were higher than those of silicone rubber reinforced with precipitated silica. It was found that the electrical and mechanical properties of silicone rubber were influenced greatly by the water contents of silica.
Fabrication of Hydrophobic Surfaces using Copper Electrodeposition and Oxidation
권민호,지원영,주종남 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
The fabrication process of metallic hydrophobic surfaces was investigated using copper electrodeposition and oxidation. Hierarchical structures have well known advantages for producing super-hydrophobic surfaces. A micro-pillar array with a hierarchical structure of copper was fabricated through a sequential process of laser ablation followed by electrodeposition. Heat oxidation enhanced the hydrophobicity of both flat and micro-structured copper surfaces. Electrodeposition at higher current density gave a hierarchical structure with low surface energy, resulting from the presence of copper oxide. Fabricated surfaces with a depth of more than 100 micrometers display super-hydrophobicity. The effects of copper oxide and hierarchical structure were confirmed by an oxidation test of the fabricated structures, because the thickness of copper oxide was undetectable by XRD and XPS.