Oxygen non-stoichiometry and electrical conductivity of the binary strontium cobalt oxide SrCoOx

✍ Scribed by V.V Vashook; M.V Zinkevich; H Ullmann; J Paulsen; N Trofimenko; K Teske

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 834 KB
• Volume: 99
• Category: Article
• ISSN: 0167-2738
• DOI: 10.1016/s0167-2738(97)00192-6

✦ Synopsis

Strontium cobaltite was investigated using solid-electrolyte coulometry and resistivity measurements in the temperature range 20-10508C and oxygen partial pressures 0.5-400 Pa. Two observed oxygen desorption / sorption maxima within the temperature range 500-9508C correlate with phase transitions of this compound as reported in the literature. An additional oxygen desorption / sorption maximum was found at a temperature of 965-10008C, which is explained an order-disorder transition of the cubic high-temperature phase. The dependencies of equilibrium values of oxygen content as well as specific resistivity on temperature and oxygen partial pressure were founded for the cubic phase.