Electrical and thermal characterization of Sm3+ doped ceria electrolytes synthesized by combustion technique

摘要: Abstract Nanocrystalline samarium doped ceria electrolyte [Ce0.9Sm0.1O1.95] was synthesized by citrate gel combustion technique involving mixtures of cerium nitrate oxidizer (O) and citric acid fuel (F) taken in the ratio O/F = 1. The as-combusted precursors were calcined at 700 °C/2 h to obtain fully crystalline nano particles. It further made into cylindrical pellets compaction sintered 1200 °C with different soaking periods 2, 4 6 h. characterized for microstructures, electrical conductivity, thermal conductivity diffusivity properties. In addition, derived powder also analysed crystallinity, BET surface area, particle size morphology. Sintered samples attained nearly 98% theoretical density 1200 °C/6 h. microstructures exhibit dense grains less than 500 nm. measurements showed value order 10−2 S cm−1 600 °C activation energy 0.84 eV between temperatures 100 650 °C room temperature values determined as 0.5 × 10−6 m2 s−1 1.2 W m−1 K−1, respectively.