Crystal structure, oxygen nonstoichiometry and diffusion mobility in some ferrites-nickelites

Abstract

1 Abstract. Crystal structure, thermal expansion, oxygen non-stoichiometry, electrical conductivity and diffusion characteristics of two analogous LaFe 0.7 Ni 0.3 O 3-δ and PrFe 0.7 Ni 0.3 O 3-δ compositions were investigated depending on temperature (20-1000 °C) and oxygen partial pressure (0.6-21000 Pa). The found oxygen diffusion and oxygen exchange coefficients for the both compositions at similar conditions are near to each other and varied in the range of 1·10 -7 -1·10 -5 cm 2 ·s -1 and 5·10 -6 -1·10 -4 cm·s -1 , respectively.