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OALib Journal期刊
ISSN: 2333-9721
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低温燃烧合成制备ce0.8y0.2o1.9电解质
Abstract:
？以柠檬酸为还原剂,以硝酸盐为氧化剂,使用溶胶-凝胶低温燃烧工艺制备ce0.8y0.2o1.9纳米粉体,研究了溶液的凝胶化和硝酸盐与柠檬酸的摩尔比对粉体的微观结构及烧结性能的影响.结果表明:柠檬酸(ca)与金属离子(mn+)的摩尔比(nca/nn+m)和溶液的ph值决定了金属离子的络合,柠檬酸与金属离子的络合物通过氢键凝胶化.当燃烧反应中硝酸盐与柠檬酸的比值为1.5时,粉体具有很好的成型和烧结性能.将素坯在1350℃保温4h,得到的烧结体晶粒尺寸为0.46μm,相对密度95%以上,700℃时的离子电导率为0.034s·cm-1.
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