【摘要】 用高分子凝胶法制备了氧化物固体电解质SrCe0．85Y0.15O2．925,研究了单体与网络剂的配比、烧结温度等参数对相平衡关系和材料性能的影响．结果表明:当单体与网络剂的质量比是5:1,在1300℃烧结可以合成出单相钙钛矿结构的SrCe0．85Y0．15O2．925．样品的致密性随着烧结温度的升高而提高,在1300℃烧结出的样品密度大约为理论密度的95％;电导率随着样品密度的增大而增大,700℃时样品的电导率大于0．10 mS·m-1．更多还原

【Abstract】 Nanometer-sized SrCe0.85Y0.15O2.925 powder was synthesized as middle or low temperature solid electrolyte by the polyacrylamide gel method. The acrylamide was used as monomer, N,N-methylenebis-acrylamide was used as lattice reagent and the ammonium peroxydisulfate was used as evocatingagent. The characterization of powders was studied by XRD and TEM. The results show that the monomer and lattice reagent were burned out at 700℃by FT-IR spectrum, the particle-diameter distribution of powders was about 20-28 nm and a specific surface area was about 38-46 m2·g-1. The fired samples from650℃to 1000℃there were triple phases including Ce2Y2O7,Ce2Sr2O5 and CeO2, the sample at 1200℃there were SrCe0.85Y0.15O2.925 and a small amount CeO2. The single phase SrCe0.85Y0.15O2.925 material can be obtained at 1300℃. The density of sample become larger gradually along with the increase of firing temperature and the conductivity of sample become larger gradually along with the increase of density. The conductivity of sample was higher than 1.0×10-1mS·m-1 at 700℃.更多还原