Surface phenomena in conducting materials based on lanthanum chromite

Microstructure of refractories with participation of lanthanum chromite

“…A mechanism was presented in [3] for lanthanum chromite electrical conductivity. The leading role was demonstrated in electrical conductivity of polarons that primarily diffuse over grain boundaries.…”

“…The electrical conductivity of lanthanum chromite at 1750°C according to data in [3] is 58.9 W -1 × m -1 . Lanthanum chromite alloyed with calcium of composition La 0.96 Ca 0.04 CrO 3 at 1750°C has an electrical conductivity equal to 240 W -1 × m -1 .…”

“…In this connection material electrical conductivity is affected considerably by grain surface development, and also the stability of the surface chemical composition. In [4] surface phenomena were considered in electrically conducting multiphase material based on lanthanum chromite. In particular, the x-ray electron spectrum was analyzed for the surface of grains in a two-phase resistive composite of lanthanum chromite -yttrium oxide.…”

“…for this extrusion was used to prepare a U-shaped structure for resistive objects made of lanthanum chromite. This molding method for electric heaters is promising fro creating heaters with a single current lead.The resistance properties of multiphase materials based on lanthanum chromite govern not only the electrical conductivity of lanthanum chromite, but also distribution within the volume of the refractory of dielectric and electrically conducting components [3,4]. A mechanism was presented in [3] for lanthanum chromite electrical conductivity.…”

“…The resistance properties of multiphase materials based on lanthanum chromite govern not only the electrical conductivity of lanthanum chromite, but also distribution within the volume of the refractory of dielectric and electrically conducting components [3,4]. A mechanism was presented in [3] for lanthanum chromite electrical conductivity.…”