bazr0.9y0.1o3质子导体的制备及烧结性能分析word格式论文.docxVIP

优秀毕业论文 精品参考文献资料 Abstract Solid oxide fuel cells (SOFCs) provide many advantages over other type of fuel cells because of high energy conversion efficiency,no pollutants,fuel flexibility and environmental safety. High temperature proton conductors (HTPCs) oxides have gained widespread interest as electrolyte materials alternative to oxygen-ion conductors because water vapor produces at anode side without diluting the fuel, which reduced the complexity of battery systems. Compared to other proton conductors,zirconium barium based proton conductor is chemically stable in intermediate temperatures rang of 400℃~700℃, as no reaction with acidic gases such as CO2 happen,together with no water vapour to form carbonates and hydroxides. However, zirconium barium electrolyte has poor conductivity due to higher grain boundary resistance since poor sintering behavior.Therefore,improvement of the zirconium barium matrix sintering performance is one of the research focuses for the realization of applications. In this paper, nanoceramic powders of proton conducting BaZr0.9Y0.1O3-delta (BZY10) have been prepared at low crystallization temperature by inorganic sol-gel synthesis route. Fators that influencing the performance of BZY10 powder, including the calcined temperature,pH,complexing agents,holding time were investigated on morphology of the crystal, average particle size and barium carbonate (BaCO3) content. It is found that when the calcined temperature is 1000 ° C,pH = 8 ~ 9,the ration of citric acid to EDTA is 1,the average particle size is the smallest， regardless of the holding time. Different content of lithium oxide (Li2O) ,zinc oxide (ZnO) and bismuth oxide (Bi2O3) sintering aids were investigated on the zirconium barium morphology, sintering properties and electrical conductivity,and the sintering aids 5mol% of Bi2O3 dopanted electrolyte sintering temperature move up by about 100 ℃and at 1500 ℃, the relative density of electrolyte is up to 95