浆料组成对相转变方法制备陶瓷基体孔结构的影响  

Casting slurry composition tailoring on microstructure of ceramic substrate prepared by phase inversion method

作　　者：胡亚文[1] 朱腾龙[1] 牛玉霜 杨志宾[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《中国科技论文》2015年第10期1225-1228,共4页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20130023120023)

摘　　要：为了制备孔结构适于浸渍的固体氧化物燃料电池（SOFC）陶瓷基体,本文以N-甲基吡咯烷酮（NMP）为溶剂、聚苯醚砜（PESF）为黏结剂,与Gd0.1Ce0.9O2-δ（GDC）粉体混合,然后经流延成型后浸入非溶剂中（水、水和NMP的混合溶液）,通过相转变反应形成基体素坯,在1 400℃烧结得到GDC陶瓷基体。通过扫描电子显微镜、阿基米德排水法及压汞仪等,研究了PESF和NMP含量,以及非溶剂的组成对GDC陶瓷基体的孔形貌、孔分布和孔隙率的影响。试验结果表明：采用质量分数为10%的PESF（m（PESF）∶m（GDC））和质量分数为60%的NMP（m（NMP）∶m（GDC））,且非溶剂为水时,可以得到孔隙率（〉40%）、孔形貌（直通孔）和孔分布（1~10μm）都适于SOFC电极浸渍要求的直通孔陶瓷基体。The porous Gd0.1Ce0.9O2-δ（GDC）ceramic backbones have been prepared through phase inversion method,which are beneficial for infiltration in fabrication of solid oxide fuel cells（SOFC）.GDC powders were mixed with proper amount of solvent（NMP）and binder（PESF）to form slurry,and then the slurry was tape-casted into slurry film on the tape-casting machine.After the tape-casting process,the film was immerged into the non-solvent（water or mixture of water and NMP）to make phase-inversion process happen.Finally,the green tapes obtained in the phase-inversion process were sintered at 1 400℃to form ceramic substrate.The effects of PESF and NMP contents and non-solvent composition on the pore morphology,porosity and pore distribution were systematically studied.The results showed that,when 10% PESF（m（PESF）：m（GDC））,60% NMP（m（NMP）：m（GDC））and water as non-solvent were used,the optimized results of porosity（above 40%）and pore morphology（finger-like pores）and pore distribution（1-10μm）for SOFC ceramic substrate could be obtained.

关 键 词：直通孔 相转变 固体氧化物燃料电池 

分 类 号：TQ174.1[化学工程—陶瓷工业] TM911.4[化学工程—硅酸盐工业]