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Korean Chemical Engineering Research,
Vol.50, No.1, 1-5, 2012
Vol.50, No.1, 1-5, 2012
Ba0.5Sr0.5Co0.8Fe0.2O3-δ 중공사 분리막의 제조 및 물성
Fabrication and Property of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Hollow Fiber Membranes
외경 1.02 mm, 내경 0.437 mm를 갖는 Ba0.5Sr0.5Co0.8Fe0.2O3-δ 중공사를 상전이 방적기술로 제조하였다. 초기 Ba0.5Sr0.5Co0.8Fe0.2O3-δ 선구 분말은 착체중합법을 이용하여 합성하였고, 900 ℃ 에서 하소하였다. 합성한 분말을 고분자 용액에 분산시킨 후 이중관형 노즐을 통해 중공사를 사출하였다. 최종적으로 산소분리에 사용 가능한 치밀 Ba0.5Sr0.5Co0.8Fe0.2O3-δ 중공사막을 1,080 ℃ 에서 2 시간 동안 소결하여 얻을 수 있었다. 또한 0.58 mm의 매우 얇은 분리막임에도 불구하고, BSCF 중공사 분리막은 602.5 MPa의 적당한 기계적 강도를 유지하였다.
Ba0.5Sr0.5Co0.8Fe0.2O3-δ hollow fiber with o.d. 1.02 mm and i.d. 0.437 mm were fabricated by a phaseinversion spinning technique.The starting Ba0.5Sr0.5Co0.8Fe0.2O3-δ precursor was synthesized by the polymerized complex method and then calcined at 900 ℃. As-prepared powder was dispersed in a polymer solution, and extruded as form of hollow fiber through a spinneret. Finallydense Ba0.5Sr0.5Co0.8Fe0.2O3-δ hollow fiber membrane was obtained by
sintering for 2 h at 1,080 ℃ for the application of oxygen separation. In addition, despite a very thin membrane with 0.58 mm, the BSCF hollow fiber membrane possessed a proper mechanical strength of 602.5 MPa.
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