【摘要】 添加H₃BO₃,SrCl₂或SrF₂等助熔剂显著提高了焙烧得到的SrCe_0.95Yb_0.05O_3-α陶瓷粉料的比重。添加2％SrF₂使比重接近理论值。用此陶瓷粉料在较低温度较短时间条件下烧结即可得到密度符合固体电解质要求的烧结体。DTA、TG、XRD分析结果表明,助熔剂促使SrCeO₃在较低温度下开始生成并使反应完全。交流阻抗谱、氢浓差电池电动势测定结果表明,助熔剂对电导率、离子活化能无明显影响。973K以下温度的质子迁移数接近1。更多还原

【Abstract】 Small amount of H3BO3, SrCl2 or SrF2 improved the specific gravity of calcined SrCeO3based powder. The addition of 2% SrF2made the specific gravity close to the theoretical. The results of DTA, TG and XRD shown that the addition of fluxes accelerates the formation of SrCeO3. Using the precursor powder, ceramics having density above 94% of the theoratical have been sintered. The measurements of AC impedance and EMF of hydrogen concentration cell shown that the addition of SrF2does not degrade the material properties. The proton transference number is close to unit in the temperature range of 773-973K.更多还原