摘要
应用溶胶-凝胶法在1000℃下合成了磷灰石型电解质La_(9.33)Si_6O_(26),并采用正交实验法研究了水硅比、硅浓度以及pH值对样品合成的影响。合成的样品经XRD表征为单相的磷灰石结构,其比表面积为4.7m^2/g。合成的La_(933)Si_6O_(26)粉末样品经1500℃烧结10h,相对密度达83.8%,采用交流阻抗谱法测得其800℃时的氧离子电导率为1.15×10^(-3)S·cm^(-1)。
The electrolyte of apatite structure La9.33Si6O26 is synthesized by the sol-gel process. The dependence of the nature of the phases is studied by the orthogonal experiment of varying several parameters such as the by： drolysis rate, the silicon concentration and pH value. The obtained powders are apatite phase determined by XRD analysis, and the specific surface area of these oxyapatite materials is 4. 7m^2/g. After sintering at 1500℃ for 10h of the powders, the relative density of the sample is 83.8%, and the ionic conductivity is 1.15× 10^-3 S ·cm^-1 at 800℃ measured by AC impedance spectroscopy.
基金
江苏省高校自然科学研究计划(05KJB430047)
