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用柠檬酸络合法制备出双掺杂CeO2基粉体材料,考察了柠檬酸用量、焙烧温度、升温速率和成胶温度等制备条件对粉体材料BET比表面积、孔容、平均孔径和平均粒径的影响。柠檬酸用量和焙烧温度对粉体材料的这些性能影响较大,升温速率只是对平均粒径产生影响,成胶温度对BET比表面积没有影响,对孔容和平均孔径影响也很小,对平均粒径影响大一些。通过对不同柠檬酸用量和不同焙烧温度所得样品进行XRD表征,发现双掺杂并未改变CeO2晶型,但晶胞参数略有增大,表明掺杂离子进入CeO2晶格。柠檬酸用量几乎不影响平均晶粒大小,而焙烧温度对平均晶粒产生较大影响,焙烧温度越高,平均晶粒越大。不同掺杂元素对粉体材料的表面性能也产生一定影响,掺杂Ca2+的平均粒径比同主族的Mg2+和Sr2+小。通过对不同制备条件的考察,为制备固体氧化物电解质粉体材料提供了基础。
The doping CeO2-based powder was prepared by citric acid complexation method. The effects of preparation conditions such as the amount of citric acid, calcination temperature, heating rate and temperature on the BET surface area, pore volume, average pore size and average Effect of particle size. The amount of citric acid and calcination temperature have great influence on these properties of the powder material, the heating rate only affects the average particle size, the gelation temperature has no effect on the BET specific surface area, and has little effect on the pore volume and the average pore size. Particle size greater impact. By XRD characterization of samples with different amounts of citric acid and different calcination temperature, it was found that double doping did not change the crystalline form of CeO2, but the unit cell parameters increased slightly, indicating that doping ions enter the CeO2 lattice. The amount of citric acid almost does not affect the average grain size, while the calcination temperature has a greater impact on the average grain size. The higher the calcination temperature, the larger the average grain size. Different doping elements also have certain influence on the surface properties of the powder materials. The average particle size of doped Ca2 + is smaller than that of Mg2 + and Sr2 + of the main group. Through the investigation of different preparation conditions, the preparation of solid oxide electrolyte powder materials provided the basis.