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PEMFC용 복합소재 분리판을 위한 2단계 제조공법의 제조 조건에 대한 연구
허성일(Heo, Seong-Il),오경석(Oh, Kyeong-Seok),윤진철(Yun, Jin-Cheol),양유창(Yang, Yoo-Chang),한경섭(Han, Kyung-Seop) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06
The 2-step manufacturing method consisting of preforming and stamping processes was developed to manufacture composite bipolar plates for PEMFCs. The preform was composed of expanded graphite, graphite flake and phenol resin. Precuring conditions were optimized by checking the electrical conductivity, flexural strength and microstructure. Precuring temperature (100?C) slightly above the melting point of phenol powders (90?C) induced moderate curing, but also prevented excessive curing. Preforms utilizing the tangled structure of expanded graphite were easily fabricated at low pressure of 0.07-0.28MPa. The proper precuring time, 5min, was determined to fabricate the preform stably because insufficient and excessive precuring deteriorated the flexural strength of composite bipolar plates.