Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Compaction of Hydrogen Storage Alloy Powders Using Polymer Binders

고분자 결합제를 이용한 수소저장합금 분말의 성형

  • Song, Kyu-Tae (Department of Metallurgical Engineering, Kyung Pook National University) ;
  • Kim, Chan-Jung (Department of Metallurgical Engineering, Kyung Pook National University) ;
  • Choi, Byung-Jin (Department of Metallurgical Engineering, Kyung Pook National University) ;
  • Kim, Dai-Ryong (Department of Metallurgical Engineering, Kyung Pook National University)
  • 송규태 (경북대학교 금속공학과) ;
  • 김찬중 (경북대학교 금속공학과) ;
  • 최병진 (경북대학교 금속공학과) ;
  • 김대룡 (경북대학교 금속공학과)
  • Published : 1994.06.30
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Abstract

Compaction techniques of hydrogen storage alloy 'powders, to solve the problems due to disintegration during the cyclic hydriding and dehydriding, by using polytetrafluoroethylene (PTFE) and silicon sealant as a polymer binder were studied. Optimum conditions of compaction were as follows. Binder content, 10 % for PTFE and 5 % for silicon sealant ; particle size of alloy powders, $-25{\mu}m$ ; compacting pressure, $4ton/cm^2$. Compacts obtained were easily activated and had a good strength even after 30 cycles of hydriding and dehydriding. PTFE added compacts showed very good rate capability, however, in the silicon added compacts hydrogen absorption rate was somewhat slow because of higher elasticity and adhesiveness of the binder.

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Acknowledgement

Supported by : 한국과학재단