Cu_(1.1)Mn_(1.9)O_4材料的组织及导电性和热稳定性的研究

The electrical conductivity and stability of Cu_(1.1)Mn_(1.9)O_4 material

通过固相和溶胶-凝胶法分别制备了尖晶石结构的 Cu1．1 Mn1．9 O 4粉末.Cu1．1 Mn1．9 O 4材料750℃的电导率为30 S/cm,室温~800℃加热和冷却有少量第二相溶入和析出,与 SOFC 阴极材料 La0．8 Sr0．2 MnO 3（LSM）在750℃/500 h 共烧时表现出很好的化学稳定性.

Cu1 .1 Mn1 .9 O 4 powder was prepared by solid reaction method and sol-gel method.The electrical conduc-tivity of Cu1 .1 Mn1 .9 O 4 powder was 30 S/cm at 750 ℃,and a small amount of second phase was dissolved and precipitated from it in heating and cooling process when the temperature rising from RT to 800 ℃ or decreasing from 800 ℃ to RT.It showed a good chemical stability when Cu1 .1 Mn1 .9 O 4 sintered with La0.8 Sr0.2 MnO 3 （LSM） for 500 h at 500 ℃.