CAJ | 학술논문

采用溶胶-凝胶法制备Y0.06Sr0.94Ti1-xFexO3-δ(x为原子分数。x=0.2，0.3，0.4，0.5)混合导体材料，用X射线衍射(XRD)分析该材料的物相，采用交流阻抗法和电子阻塞电极法分别测定其总电导率与离子电导率，研究铁含量对Y0.06Sr0.94TiO3混合导体材料的结构及电性能的影响。结果表明该材料属于单一立方相钙钛矿结构；在测试温度范围内，Y0.06Sr0.94Ti1-xFexO3-δ的总电导率和离子电导率都随温度升高而增大；随 Fe 掺杂量增加，总电导率和离子电导率都增大。在800℃下Y0.06Sr0.94Ti1-xFexO3-δ(x=0.2，0.3，0.4，0.5)的总电导率为0.019～0.12 S/cm，离子电导率为0.0106～0.0153 S/cm。根据传导活化能可以看出，x从0.3增加到0.4时材料的传导机制发生改变。
채용용효-응효법제비Y0.06Sr0.94Ti1-xFexO3-δ(x위원자분수。x=0.2，0.3，0.4，0.5)혼합도체재료，용X사선연사(XRD)분석해재료적물상，채용교류조항법화전자조새전겁법분별측정기총전도솔여리자전도솔，연구철함량대Y0.06Sr0.94TiO3혼합도체재료적결구급전성능적영향。결과표명해재료속우단일립방상개태광결구；재측시온도범위내，Y0.06Sr0.94Ti1-xFexO3-δ적총전도솔화리자전도솔도수온도승고이증대；수 Fe 참잡량증가，총전도솔화리자전도솔도증대。재800℃하Y0.06Sr0.94Ti1-xFexO3-δ(x=0.2，0.3，0.4，0.5)적총전도솔위0.019～0.12 S/cm，리자전도솔위0.0106～0.0153 S/cm。근거전도활화능가이간출，x종0.3증가도0.4시재료적전도궤제발생개변。
A single phase perovskite Y0.06Sr0.94Ti1-xFexO3-δ(x=0.2, 0.3, 0.4, 0.5) was synthesized at 1 350 ℃ in air by sol-gel method and its mixed ionic-electronic conductivity was investigated as a function of the Fe content. The total electrical conductivities and the oxygen ionic conductivities of Y0.06Sr0.94Ti1-xFexO3-δ(x=0.2, 0.3, 0.4, 0.5) ceramics were investigated by AC impedance spectroscopy and electron-blocking electrode, respectively. With increasing Fe-doping amount and temperature, the total electrical conductivity of Y0.06Sr0.94Ti1-xFexO3-δincreases in the temperature range of 400~900 ℃. On the other hand, the ionic conductivity of Y0.06Sr0.94Ti1-xFexO3-δ increases significantly with Fe-doping amount and temperature increasing between 650 and 950℃. The total electrical conductivities and ionic conductivities of Y0.06Sr0.94Ti1-xFexO3-δ(x=0.2, 0.3, 0.4, 0.5) are 0.019~0.12 S/cm and 0.010 6~0.015 3 S/cm at 800℃, respectively. The conduction mechanism of Y0.06Sr0.94Ti1-xFexO3-δ(x=0.3) is different from that of Y0.06Sr0.94Ti1-xFexO3-δ(x=0.4) according to the total electrical conductivity and ionic activation energy.