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박권필,조규진,이건직,전해수,Park Kwon Pil,Cho Gyou Jin,Lee Gun Jik,Chun Hai Soo 한국전기화학회 1999 한국전기화학회지 Vol.2 No.4
고분자전해질형 연료전지에서 에칭한 Nafion막으로 고분자막/전극 어셈블리를 제조하고 그 성능을 측정하였다. 에칭을 함으로서 고분자막과 전극의 접합이 잘 이루어져 hot pressing 압력과 온도를 낮출 수 있었고, 낮은 온도에서 hot pressing이 이루어짐으로서 전지의 성능을 향상시킬 수 있었다. 어셈블리 제조방법중의 하나인 페인팅 방법에서 에칭 된 Nafion막을 이용하면 전지의 성능이 향상됨을 보였으며, 에칭정도에 따라 적당한 양의 전극촉매를 사용해야 함을 보였다. Etched Nafion membrane and electrode assemblies were fabricated and those performances were observed in PEMFC. Adhesion of membrane to electrode increased with abrasion of membrane surface. Membrane surface ething results in reduction of hot pressing temperature, as a consequence, in improving of cell performance. It was found that Nafion etching was effective in painting method. The optimum content of electrode catalyst should be selected according to etching intensity.
분체공학,유동층,고분자,재료(무기, 유기) : 제철 분진 슬래그를 이용한 열용사 코팅 막의 물리화학적 특성분석
이영석 ( Young Seak Lee ),정성기 ( Sung Gi Jung ),유승화 ( Seung Hwa Yoo ),조규진 ( Gyou Jin Cho ) 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.3
The steel powder slags, consisted of 90 wt% of carbon and iron oxides, can ba simply reduced to carbon and iron. In this research, we studied the physicochemical characteristics of thermal spray coated films prepared using the reduced powder slags as a highly valuable powders for the thermal spray coatings. After the reduced powder slags were divided into three fractions(65 to 90㎛, 90 to 106㎛, and 106 to 125㎛) based on the particle sizes, we carried out the thermal spray coating using each samples under the same thermal spray coating condition and found out that the particles with the sizes of 106 to 125㎛ had the best deposition efficiency. The microstructures of the coated films were investigated using XRD and XPS, and the adhesion strength and corrosion resistance were studied as well.