摘要
采用柠檬酸溶胶-凝胶法合成了La0.9-xNdxSr0．1MnO3（X=0．05，0，10，0．15），用X射线衍射（XRD）分析粉体的晶格类型，交流阻抗测试分析试样的电导率变化。结果表明：La0.9-xNdxSr0．1MnO3与LaMn03晶格类型相同，仍为钙钛矿型，仅仅是晶格结构发生了畸变。各组分试样的电导率均随着温度的升高而增大。在823～973K温度范围内，x=0．1的样品La08Nd0lSr0．1Mn03的导电率最大，其电导率为22．9×10^-4～24．0×10^-4S·cm^-1，并且活化能最小为0．13Ea／eV。该体系的电导率与温度的关系符合阿伦尼鸟斯定律。
La0.9-xNdxSr0.1MnO3 （x=0.05, 0.10, 0. 15） are synthesized with citric acid sol-gel method. Lattice style is tested by XRD and the conductivity of the samples is analyzed by AC impedance. The result shows that., the perovskite-type lattice style of La0.9 xNdxSr0.1MnO3 is the same as that of LaMnO3, only differs in the lattice structure. The conductivity of each sample increases with a rise in temperature. At 823-973K, the conductivity of La0.9-xNdxSr0.1MnO3 （x=0.10） is always the highest, which is between 22. 9 ×10^-4 -24.0 × 10^-4 S · cm^-1 , and has the smallest activation energy, which is 0.13Ea/eV. The relationship between electrical conductivity and temperature is found to conform to Arrhenius law.
出处
《中国材料科技与设备》
2007年第6期63-65,共3页
Chinese Materials Science Technology & Equipment
