Electrolyte Sheet for Solid Oxide Fuel Cell, Process for Producing the Same, and Solid Oxide Fuel Cell
申请人:Hata Kazuo
公开号:US20100159355A1
公开(公告)日:2010-06-24
This invention provides an electrolyte sheet for solid oxide fuel cells, characterized in: being formed by a doctor blade method or an extrusion molding method; being a scandia partially stabilized zirconia sheet, wherein 4 mol % to 6 mol % scandia is doped in a solid zirconia; a crystal structure thereof has a polycrystalline structure having a main body of tetragonal and including monoclinic phase, wherein a ratio of monoclinic phase (M), calculated by below described formula (1) from a diffraction peak intensity using X-ray diffraction, is 1% to 80%; and a Weibull modulus (m) thereof is not less than 10:
a ratio of monoclinic phase(
M
:%)=[monoclinic(1,1,1)+monoclinic(−1,1,1)}/tetragonal and cubic(1,1,1)+monoclinic(1,1,1)+monoclinic(−1,1,1)}]×100 (1).
本发明提供了一种用于固体氧化物燃料电池的电解质膜,其特征在于:采用医生刮板法或挤出成型法形成;是一种部分稳定的氧化锆钇膜,其中在固体氧化锆中掺杂了4摩尔%至6摩尔%的氧化钇;其晶体结构具有主体为四方晶系并包含单斜相的多晶结构,其中通过使用X射线衍射计算得到的单斜相(M)的比例(%),由下述公式(1)计算,为1%至80%;其Weibull模数(m)不小于10:单斜相(M:%)= [单斜(1,1,1)+单斜(-1,1,1)}/四方和立方(1,1,1)+单斜(1,1,1)+单斜(-1,1,1)}]×100(1)。