The synthesis and transport properties of the cuprates La2-x Sr1+x Cu2O6+deltaстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The cuprates La2 - x Sr1 + x Cu2O6 + delta(x = 0, 0.1, 0.2) are synthesized by solid-state method. Their dc conductivity was studied over the 373 to 1173 K temperature range and 10 to 2.1 x 10(4) Pa oxygen partial pressure range by using four-probe technique. It is shown that the cuprate conductivity in air is maximal at similar to 673 K; it is 60 S/cm for La2SrCu2O6.09; 68 S/cm, for La1.9Sr1.1Cu2O6.18; and 81 S/cm, for La1.8Sr1.2Cu2O6.10. The thermal expansion coefficient of La2SrCu2O6.09 is determined by thermomechanical method and high-temperature X-ray diffraction method; its value (16 ppm K-1) shows that the material is compatible with the ceria-based solid electrolytes during the thermal cycling.