Glycine nitrate process에 의한 SOFC용 Ni-YSZ cermets 제조
Synthesis of Ni-YSZ cermets for SOFC by glycine nitrate process
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초록
SOFC용 Ni-YSZ(Yttria Stabilized Zirconia) composite powders를 glycine nitrate process를 이용하여 만들었다. ZrO(NO3)2·2H2O, Y(NO3)3·6H2O, Ni(NO3)2·6H2O와 glycine을 출발원료로 하였으며 Ni의 부피비를 변화시켜 각기 그들의 소결 및 환원 특성을 알아보았다. Ni과 YSZ 상들이 상호 연결된 균질하게 분포된 다공성 미세구조를 관찰 할 수 있었으며Ni의 첨가량에 따라 기공률이 민감하게 변화함을 알 수 있었다. 35 vol% 이상의 Ni 를 함유한 Ni-YSZ cermet가 SOFC용전극재료로 사용되는데 필요한 30 % 이상의 공극을 갖는 조성임을 알 수 있었다.
Abstract
Ni-YSZ (Yttria Stabilized Zirconia) composite powders for SOFC were fabricated by glycine nitrate process. ZrO(NO3)2·2H2O, Y(NO3)3·6H2O, Ni(NO3)2·6H2O and glycine were chosen as the starting materials. The structural properties of the sintered Ni-YSZ cermets have been investigated with respect to the volume contents of Ni. A porous microstructure consisting of homogeneously distributed Ni and YSZ phases together with well-connected grains was observed. The sintered Ni-YSZ cermets showed a porous microstructure consists of homogeneously distributed Ni and YSZ phases and the grains were well-connected. It was found that the open porosity is sensitive to the volume content of Ni. The Ni-YSZ cermet containing 35 vol% Ni seems to be suitable for the electrode material of SOFC since it provides sufficient open porosity higher than 30 %.
참고문헌 (10)
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