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기능성 나노코팅 박막의 열처리 분위기에 따른 특성분석 및 오염방지 태양광 모듈제작
강현일(Hyunil Kang),신승권(Seung Kwon Shin),김형철(Hyungchul Kim),임윤식(Yonnsik Lim),유영식(Youngsik Yoo),정연호(Yeun-Ho Joung),김정현(Junghyun Kim),최원석(Won Seok Choi) 대한전기학회 2015 전기학회논문지 P Vol.64 No.3
We investigated that effects of annealing ambient on the characteristics of functional nano thin film synthesized on glass substrate. The functional nano thin films were annealed by using rapid thermal annealing (RTA) equipment in vacuum, oxygen and nitrogen ambient, respectively. The hardness of the functional nano thin films were measured by a standard hardness testing method (ASTM D3363) such as a H-9H, F, HB and B-6B pencil (Mitsubishi, Japan). Also, the adhesion of the functional nano thin films were measured by a standard adhesion testing method (ASTM D3359) using scotch tape (3M, Korea). The contact angle of the functional nano thin films was measured by a contact angle analyzer (Phoenix 300 Touch, S.E.O.). The optical property of functional nano thin films was measured via UV-visible spectroscopy (S-3100, Scinco).
세라믹 기판위에 코팅된 기능성 필름의 열처리 분위기에 따른 내오염 및 기계적 특성
선박문,강현일,최원석,정연호,Shan, Bowen,Kang, Hyunil,Choi, Won Seok,Joung, Yeun-Ho 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.4
For the improvement of the anti-pollution properties of porcelain electrical insulators, in this study, we have applied the functional film to the surface of insulator. The functional films were coated on the ceramic substrates which components were like the porcelain electrical insulator. The coating material was applied to ceramic substrate by spray coating method and then the film was cured at around $300^{\circ}C$ for 10 minutes with different gas ambient, such as $O_2$, $N_2$, and only vacuum. We have measured the contact angle of the coated surface, and obtained the lowest angle ($8.9^{\circ}$) and a strong hydrophilic property at vacuum condition. The anti-pollution properties were measured, revealing that as the contact angle decreased, the anti-pollution properties improved. The mechanical hardness and adhesion were both excellent regardless of the annealing ambient.
코팅막의 두께에 따른 기능성 코팅의 내오염 특성 분석 및 전기철도용 애자로의 활용
선박문(Bowen Shan),강현일(Hyunil Kang),최원석(Wonseok Choi),김정현(Jung Hyun Kim) 대한전기학회 2017 전기학회논문지 P Vol.66 No.2
A method of improving the anti-fouling characteristics of porcelain insulators was proposed in this study. Functional coating was performed as a method of reducing the surface contamination of the porcelain insulators. The functional coating was applied on a ceramic substrate, which has the same material as the porcelain insulators. After coating the ceramic substrate 2, 3, 4, and 5 times alternately in the horizontal and vertical directions, the surface characteristics according to the thickness of the coating film were analyzed. The optimal process was selected to coat the surfaces of the post insulators and long rod insulators, which are the representative porcelain insulators. After coating, heat treatment was performed for 1 hour at 200oC in a furnace to secure the durability of the coating film. Compared to the uncoated insulators, the insulators with the functional coating showed significantly improved anti-fouling characteristics as well as excellent adhesion to the coated insulator surface.
선박문(Bowen Shan),강현일(Hyunil Kang),최원석(Won Seok Choi),이경복(Kyoung-Bok Lee),마상견(Sanggyeon Ma) 대한전기학회 2016 전기학회논문지 P Vol.65 No.1
Because of the low pollution resistance of the porcelain electrical insulator itself, in this work the anti-pollution performance of insulator was improved by using the functional coating. The ceramic substrates that components were same as the porcelain electrical insulator were used in this experiment. The functional films were coated on the ceramic substrate by using a spray coating method, and then the coated substrate were annealed under different coating condition such as natural curing and annealing temperature of 200℃, 300℃ and 400℃. Then, the contact angles of the coated surfaces were measured and the minimum angle (8.3o) was obtained at 400℃. The anti-contamination properties were measured, revealing that as the contact angle decreased, the anti-contamination properties improved. The hardness and adhesion were small at the natural curing condition however the excellent mechanical properties were obtained under higher temperature annealing.
김성윤(Sung-Yun Kim),강현일(Hyunil Kang),최원석(Won Seok Choi),정연호(Yeun-Ho Joung),임윤식(Yonnsik Lim),유영식(Youngsik Yoo),황현석(Hyun Suk Hwang),송우창(Woo-Chang Song) 대한전기학회 2014 전기학회논문지 P Vol.63 No.4
Graphite electrodes are used for secondary batteries, fuel cells, and super capacitors. Research is underway to increased the reaction area of graphite electrodes used carbon nanotube (CNT) and porous carbon. CNT is limited to device utilization in order to used a metal catalyst by lack of surface area to improve. In contrast carbon nanowall (CNW) is chemically very stable. So this paper, microwave plasma enhanced chemical vapor deposition (PECVD) system was used to grow carbon nanowall (CNW) on Si substrate with methane (CH₄) and hydrogen (H₂) gases. To find the growth properties of CNW according to the reaction gas ratio, we have changed the methane to hydrogen gas ratios (4:1, 2:1, 1:2, and 1:4). The vertical and surficial conditions of the grown CNW according to the gas ratios were characterized by a field emission scanning electron microscopy (FE-SEM) and Raman spectroscopy measurements showed structure variations.