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采用溶胶–凝胶法制备Y_(0.08)Sr_(0.92)Ti_(1–x)Fe_xO_(3–δ)(x=0.2,0.3,0.4,0.5)混合导体材料,用X射线衍射(XRD)分析该材料的物相组成,采用交流阻抗法和电子阻塞电极法分别测定材料的总电导率与离子电导率,研究铁含量对Y_(0.08)Sr_(0.92)Ti_(1–x)Fe_xO_(3–δ)混合导体材料的结构、电性能及阻抗行为的影响。结果表明:样品均为单一立方相钙钛矿结构;在测试温度范围内,随Fe掺杂量增加,Y_(0.08)Sr_(0.92)Ti_(1–x)Fe_xO_(3–δ)的总电导率和离子电导率都随着温度的升高而增大。800℃以下,Y_(0.08)Sr_(0.92)Ti_(1–x)Fe_xO_(3–δ)(x=0.2,0.3,0.4,0.5)的总电导率为0.017~0.110 S·cm–1,离子电导率为0.010~0.024 S·cm–1。
The mixed conductor materials of Y_ (0.08) Sr_ (0.92) Ti_ (1-x) Fe_xO_ (3-δ) (x = 0.2,0.3,0.4,0.5) were prepared by sol-gel method and characterized by X-ray diffraction The phase composition of the material, the total electrical conductivity and ionic conductivity of the material were measured by AC impedance method and electronic blocking electrode method respectively. The effect of iron content on the microstructure of Y_ (0.08) Sr_ (0.92) Ti_ (1-x) Fe_xO_ (3- δ) mixed conductor material structure, electrical properties and impedance behavior. The results show that the samples are single cubic phase perovskite structure. The total electrical conductivity of Y_ (0.08) Sr_ (0.92) Ti_ (1-x) Fe_xO_ (3-δ) Both the rate and ionic conductivity increase with increasing temperature. The total conductivities of Y_ (0.08) Sr_ (0.92) Ti_ (1-x) Fe_xO_ (3-δ) (x = 0.2,0.3,0.4,0.5) were 0.017 ~ 0.110 S · cm- Conductivity is 0.010 ~ 0.024 S · cm-1.