The effect of silver (Ag) exsolution on the electrical conductivity of strontium-doped lanthanum manganite (La 1-x-y Sr x Ag y MnO 3-δ , LSAM) and ferrite (La 1-x-y Sr x Ag y FeO 3-δ , LSAF) perovskites was investigated. The single-phase Ag-doped materials formed at 800 °C using modified Pechini method and revealed thermal stability in oxidizing atmosphere up to sintering temperature of the materials at 1,200 °C. The exsolution of the metallic Ag nanoparticles was performed at 420-500 °C in

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... cing atmosphere of 5% H 2 /N 2 . Scanning electron microcopy results exhibited the metallic Ag phase nanoparticles on the surface of the oxide backbone with a good contact of Ag to the surface of the perovskite after exsolution. The electrical conductivity of the materials was investigated in the temperature range of 50-900 °C in air and isothermally in 5% H 2 /N 2 at 420 and 500 °C by means of four probe DC measurement method, and reached 80-230 S·cm -1 for undoped and Ag-doped LSF and LSM. The electrical conductivity results showed improving conductivity in Ag-doped single-phase and Ag nanoparticle decorated perovskites after Ag exsolution. The results revealed the dependence of electrical conductivity on the atmosphere, temperature and Ag exsolution time.